Crystal oscillator frequencies
Introduction Crystal oscillators can be manufactured for oscillation over a wide range of frequencies, from a few kilohertz up to several hundred megahertz. Many applications call for a crystal oscillator frequency conveniently related to some other desired frequency, so hundreds of standard crystal frequencies are made in large quantities and stocked by electronics distributors. Using frequency dividers, frequency multipliers and phase locked loop circuits, it is practical to derive a wide range of frequencies from one reference frequency.The UART column shows the highest common baud rate (under 1,000,000), assuming a clock pre-divider of 16 is resolved to an exact integer baud rate. Though some UART variations have fractional dividers, those concepts are ignored to simplify this table. Frequency (MHz) comm UART A/V RTC Notes and Primary uses 0.032000     Real-time clock, watches; allows binary division to 1 kHz signal (25×1 kHz). 0.032768     215 allows binary division to 1 Hz. Real-time clock, quartz watches and clocks; common low-speed for microcontrollers. Very common. Available as TCXO. 0.038000     Used with FM stereo encoder chip BA1404 and similar. 0.065536     216 allows binary division to 1 Hz and 32.768 kHz. Real-time clock. 0.077500     Real-time clock, quartz watches and clocks; also the DCF77 frequency 0.100000     105 allows decade division to 1 Hz and 1 kHz. Real-time clock, quartz watches and clocks, DMM dual slope ADCs (suppresses 50 Hz noise) 0.120000     DMM dual slope ADCs (suppresses 60 Hz noise) 0.131072     217 allows binary division to 1 Hz and 32.768 kHz. Found in Fluke 17/19 DMM's 0.262144     218 allows binary division to 1 Hz and 32.768 kHz. Found in Bulova Precisionist high-frequency quartz watches. 0.383000     Ceramic resonator, in e.g. Polaroid Sonia Transducer for distance 0.429000   radio (filter)  Ceramic resonator used in some intermediate frequency filters. Common in oscillators of 36 kHz infrared remote controls (divided by 12) 0.455000   radio (filter)  Ceramic resonator used in FM broadcasting intermediate frequency filters. Common in oscillators of 38 kHz infrared remote controls (divided by 12), cheaper than crystal but less stable frequency 0.460800  28800 radio  Ceramic resonator used in HART. UART clock allows integer division to common baud rates up to 28,800(×16×1) or 57,600(×8×1). 0.480000   radio (filter)  Ceramic resonator used in some intermediate frequency filters and low-cost oscillators. Also used in DTMF generator oscillators. 0.500000   radio (filter)  Ceramic resonator used in some intermediate frequency filters and low-cost oscillators 0.524288    219 allows binary division to 1 Hz and 32.768 kHz. 1.000 106 allows decade division to 1 Hz and 1 kHz. Reference frequency. Common standard frequency. Harmonics fall on integer MHz frequencies. 1.048576  220 allows binary division to 1 Hz and 32.768 kHz. Real-time clock. 1.008  1200   UART clock allows integer division to common baud rates up to 1,200(×8×105). Used in some 1200 baud modems. 1.544 DS1    Bit clock for DS1 systems (±32 ppm, ANSI T1.102). 1.8432  115200   UART clock allows integer division to common baud rates up to 115,200(×16×1) or 230,400(×8×1). Since older UARTs used this frequency to derive common baud rates up to 115,200, then multiples of this frequency are able to do the same, such as 3.6864 / 5.5296 / 7.3728 / 9.216 / 11.0592 / 12.9024 / 14.7456 / 16.5888 / 18.432 / 20.2752 / 22.1184 / 23.9616 / 25.8048 / 27.648 / 29.4912 / 31.3344 / 33.1776 / 35.0208 / 36.864 / ..., and is why these MHz frequencies are commonly used. 2.048 E1    Allows binary division to 1 kHz (211×1 kHz). Bit clock for E1 systems (±50 ppm, ITU G3703). 2.097152     221 allows binary division to 1 Hz and 32.768 kHz; real-time clock; also for DDS generators with 1 Hz step 2.4576  38400   UART clock allows integer division to common baud rates up to 38,400(×16×4) or 76,800(×16×2). 2.500 Ethernet    Ethernet clock for 10 Mbit/s 2.560     Allows binary division to 10 kHz (28×10 kHz) 2.8224 2400 audio  Used in CD-DA systems and CD-ROM drives; allows binary division to 44.1 kHz (64×44.1 kHz), 22.05 kHz, and 11.025 kHz. DSD64 bitrate. Frequencies also used are 5.6448 MHz, 11.2896 MHz, 16.9344 MHz, 22.5972 MHz, 33.8688 MHz and 45.1584 MHz. 2.880  7200   UART clock allows integer division to common baud rates up to 7,200(×16×25) or 14,400(×8×25). Audio clock allows integer division for 48 / 96 / 192 ksps. 3.072  128000 audio  Allows binary division to 3 kHz (210×3 kHz); can be used to generate 60 Hz signals (51200×60 Hz). Used in audio systems, for 48 kHz (64×), 96 kHz (32×), 192 kHz (16×), 384 kHz (8×) 3.088 DS1    2×1.544, the bit clock for DS1 systems (±32 ppm, ANSI T1.102). Available as TCXO and OCXO. 3.2768     Allows binary division to 100 Hz (32,768×100 Hz, or 215×100 Hz) and to 50 Hz, used in e.g. wattmeters and DC-AC converters 3.560 Amateur Radio A common QRP frequency (80-meter band), also called 3560 kHz. Other less common crystals for the same band are 3.535, 3.550 (SKKC), 3.579 (digital modes) MHz. See also 7.025 MHz. 3.575611   PAL  PAL M color subcarrier 3.579545   NTSC  NTSC M color subcarrier; see colorburst. More specifically, 315/88 = 3.579 MHz. Because these are very common and inexpensive they are used in many other applications, for example DTMF generators 3.582056   PAL  PAL-N color subcarrier 3.595295   NTSC  NTSC M color subcarrier, plus horizontal scan rate (15,750). Used for a rainbow color test, produces color through the entire 360 degrees of phase shift. Unusual. 3.640   radio  8×455 kHz AM broadcast band intermediate frequency; also often used in infrared remote controls as the clock source 3.6864 W-CDMA 230400   UART clock allows integer division to common baud rates up to 230,400(×16×1) or 460,800(×8×1). Also used in W-CDMA systems. 3.93216     Allows binary division to 60 Hz (65536×60 Hz, 216×60 Hz), used e.g. in wattmeters, DC-AC converters and NTSC vertical sync generators 4.000     Common general low-power microcontroller frequency. Common as cheap ceramic resonators where frequency stability is of less concern than cost. 4.032  7200   UART clock allows integer division to common baud rates up to 7,200(×16×35) or 14,400(×8×35), used for some 1200, 2400, and 4800 baud modems. 4.096 ISDN 256000   Allows binary division to 1 kHz (212×1 kHz). Used in ISDN systems. 4.190     Ceramic resonator used in some intermediate frequency filters and low-cost oscillators, common 4.194304     222 allows binary division to 1 Hz and 32.768 kHz. Real-time clock. For DDS generators with 1 Hz step. Also found in the original Game Boy. 4.320  1800   Used for measuring 1pps deviations in 1/50th seconds per day (24h × 60m × 60s × 50). UART clock allows integer division to common baud rates up to 1,800(×16×150) or 7,200(×8×75). Audio clock allows integer division for 48 / 96 ksps. 4.3218   audio  Used in CD-DA systems and CD-ROM drives; allows integer division to 44.1 kHz (98×44.1 kHz), 22.05 kHz, and 11.025 kHz. Frequencies also used are 8.6436 MHz and 17.2872 MHz. 4.332 RDS    3648× the RDS signal bit rate of 1187.5 bit/s. While the frequency of 4.332 MHz is the most commonly used crystal resonator, its multiples (2×4.332 MHz = 8.664 MHz or 4×4.332 MHz = 17.328 MHz) have been used also. 4.43361875   PAL/NTSC  PAL B/D/G/H/I and NTSC M4.43 color subcarrier. Also used in Compact Disc players and recorders where the crystal frequency is slightly pulled to 4.41 MHz and then divided by 100 to give the 44.1 kHz sampling frequency. See also twice the frequency, 8.867238 MHz. 4.608 57600 audio  UART clock allows integer division to common baud rates up to 57,600(×16×5) or 115,200(×8×5). Audio clock allows integer division for 48 / 96 / 192 ksps. Allows integer division to 1024 kHz and binary division to lower frequencies that are whole multiples of 1 Hz. Common microcontroller clock frequency. Frequency of the Master Timing Unit (MTU) OCXO of the Space Shuttle. 4.7547   radio (ISM)  Oscillator for 315 MHz FSK/ASK superheterodyne receivers with 10.7 MHz intermediate frequency (common Chinese ISM band use for small RF remote controls), multiplied 64× (4.7547×64+10.7=315)  4.897     Reference clock for some 315 MHz transmitters and receivers, e.g. garage door openers. (Alternative frequencies for the same chipsets: 6.0630 MHz for 390 MHz, 6.4983 MHz for 418.00 MHz, 6.7458 MHz for 433.92 MHz; swapping them can swap the band.) 4.9152 CDMA 38400   Used in CDMA systems; divided to 1.2288 MHz baseband frequency as specified by J-STD-008.UART clock allows integer division to common baud rates up to 38,400(×16×8) or 76,800(×8×4). 5.000     Common standard frequency. Commonly available as TCXO and OCXO. 5.034965   NTSC  Integer multiple of the 59.94 Hz (84000×) vertical refresh and the 15.734 kHz (320×) horizontal scan rates 5.0688  57600   UART clock allows integer division to common baud rates up to 14,400(×16×22) or 57,600(×8×11). 5.120     Allows binary division to 10 kHz (29×10 kHz) 5.185   radio  Used in radio transceivers, clock for some microcontrollers 5.5296  115200   UART clock allows integer division to common baud rates up to 115,200(×16×3) or 230,400(×8×3). 5.6448 14400 audio  Used in CD-DA systems and CD-ROM drives; allows binary division to 44.1 kHz (128×44.1 kHz), 22.05 kHz, and 11.025 kHz. DSD128 bitrate (2× 2.8224 MHz). Frequencies also used (multiplies of 5.6448) are 11.2896 MHz, 16.9344 MHz, 22.5972 MHz, 33.8688 MHz and 45.1584 MHz. 6.000 USB    Common in low-speed (1.5Mbit/s) USB devices such as computer keyboards. 6.063     Reference clock for some 390 MHz transmitters and receivers, e.g. garage door openers. (Alternative frequencies for the same chipsets: 4.8970 MHz for 315.00 MHz, 6.4983 MHz for 418.00 MHz, 6.7458 MHz for 433.92 MHz; swapping them can swap the band.) 6.144  38400 audio  Digital audio systems - DAT, MiniDisc, sound cards; 128×48 kHz (27×48 kHz). UART clock allows integer division to common baud rates up to 38,400(×16×10) or 256,000(×8×3). 6.176 DS1    4×1.544, the bit clock for DS1 systems (±32 ppm, ANSI T1.102). Available as TCXO and OCXO. 6.400     Binary multiple of 100 kHz (64×100 kHz), 50 kHz, 25 kHz, 12.5 kHz. Half of the common standard 12.8 MHz. 6.4512  115200   21×307.2 kHz; UART clock allows integer division to common baud rates up to 57,600(×16×7) or 115,200(×8×7). See also 3×, 19.3536 MHz. 6.480 SONET 28800   Used to generate (×8) 51.84 MHz, the SONET STS-1 frequency (with accuracy of 20 =ppm). 6.4983     Reference clock for some 418 MHz transmitters and receivers, e.g. TV remote extenders or wireless sensors. (Alternative frequencies for the same chipsets: 4.8970 MHz for 315.00 MHz, 6.0630 MHz for 390 MHz, 6.7458 MHz for 433.92 MHz; swapping them can swap the band.) 6.5536     Allows binary division to 100 Hz (65,536×100 Hz, or 216×100 Hz); used also in red boxes 6.6128   radio (ISM)  Oscillator for 433.92 MHz FSK/ASK superheterodyne receivers with 10.7 MHz intermediate frequency (common ISM band use for small RF remote controls), multiplied 64× (6.6128×64+10.7=433.92)  6.7458     Reference clock for some 433.92 MHz ISM band transmitters and receivers, e.g. wireless sensors. (Alternative frequencies for the same chipsets: 4.8970 MHz for 315.00 MHz, 6.0630 MHz for 390 MHz, 6.4983 MHz for 418.00 MHz; swapping them can swap the band.) Available as TCXO. 6.750   SDTV  SDTV NTSC 4:3 pixel clock (352×480i@29.97) 7.023 Amateur Radio CW Paradise in China. A common QRP frequency (40-meter band). Used with Pixie QRPP transceiver. Other less common frequencies are 7.030 (QRP, digital), 7.035, 7.040, 7.045, 7.048, 7.050, 7.055 (SKKC), 7.060, 7.070 (digital), 7.110 (QRP), 7.114, 7.122 MHz. 7.15909   NTSC  NTSC M color subcarrier (2×3.579545 MHz) 7.200 DARC 1800   UART clock allows integer division to common baud rates up to 1,800(×16×250) or 7,200(×8×125). Audio clock allows integer division for 48 / 96 ksps. Half of the more common 14.4 MHz. Reference clock for DARC. 7.3728  460800   UART clock allows integer division to common baud rates up to 460,800(×16×1) or 921,600(×8×1). 7.600 Radio PLL clock for pilot tone (400×19 kHz) in FM stereo. 8.000 CAN    Used in CAN bus systems and with many small microcontroller systems. Common general microcontroller frequency (i.e. STM32 Nucleo boards, 3.3V AVR-based Arduino boards). Common as cheap ceramic resonators where frequency stability is less concern than cost. 8.184 GPS    Half the 16.368 MHz frequency; same use in different chipsets. 8 times the 1.023 MHz C/A GPS signal chipping rate. Multiplied by 192.5 to get the 1575.42 MHz L1 frequency and multiplied by 150 to get the 1227.60 MHz L2 frequency. 8.192 ISDN 256000 audio  Allows binary division to 1 kHz (213×1 kHz). Used in ISDN systems. Used in OKI Speech Processor. Common audio clock, 256×32 kHz (see also 11.2896, 12.288, 16.384, 18.4323, 22.5792, 24.576 MHz). Typical TDM/PCM audio interface clock, 1/6 of 49.152 MHz. 8.388608     223 allows binary division to 1 Hz and 32.768 kHz. Real-time clock; also for DDS generators with 1 Hz step 8.4672  1800 audio  Used in CD-DA systems and CD-ROM drives; allows integer division to 44.1 kHz (192×44.1 kHz), 22.05 kHz, and 11.025 kHz. UART clock allows integer division to common baud rates up to 1,800(×16×294) or 7,200(×8×147). Frequencies also used are 11.2896 MHz, 16.9344 MHz, 22.5972 MHz, 33.8688 MHz and 45.1584 MHz. 8.6436   audio  Used in CD-DA systems and CD-ROM drives; allows integer division to 44.1 kHz (196×44.1 kHz), 22.05 kHz, and 11.025 kHz. Frequencies also used are 4.3218 MHz and 17.2872 MHz. 8.664 RDS    The RDS signal bit rate is at 1.1875 kbit/s. While the frequency of 4.332 MHz is the most commonly used crystal resonator, its multiples (2×4.332 MHz = 8.664 MHz or 4×4.332 MHz = 17.328 MHz) have been used also. 8.867248.867238   PAL  PAL B/G/H color subcarrier (2×4.433618 MHz) 9.000   SDTV  SDTV PAL/NTSC 16:9 pixel clock (480×480i@29.97, 480×576i@25) 9.216  576000 audio  UART clock allows integer division to common baud rates up to 115,200(×16×5) or 576,000(×16×1). Audio clock allows integer division for 48 / 96 / 192 ksps. Allows integer division to 1024 kHz and binary division to lower frequencies that are whole multiples of 1 Hz. Master clock for some Japanese variants of DOCSIS. 9.29063   radio (ISM)  Oscillator for 308 MHz FSK/ASK superheterodyne receivers with 10.7 MHz intermediate frequency (less common band used for small RF remote controls), multiplied 32× (9.29063*32+10.7=308)  9.50939   radio (ISM)  Oscillator for 315 MHz FSK/ASK superheterodyne receivers with 10.7 MHz intermediate frequency (common Chinese ISM band used for small RF remote controls), multiplied 32× (9.50939*32+10.7=315)  9.54545   NTSC  2/3 of the 14.31818 MHz NTSC clock, 1/3 of the 28.636 MHz clock; common clock for microcontrollers and older processors. Exactly 210/22  MHz. 9.600  4800   UART clock allows integer division to common baud rates up to 4,800(×16×125) or 9,600(×8×125). Available as TCXO and OCXO. Used in 19.2 and 48 MHz PLL generators. Can be used as seed clock for 48 and 60 GHz PLL oscillators and in frequency synthesizers for mobile radio as the common channel spacings can be easily derived. 9.8304 CDMA 38400   Used in CDMA systems (2×4.9152 MHz); divided to 1.2288 MHz baseband frequency. UART clock allows integer division to common baud rates up to 38,400(×16×16) or 76,800(×8×16). 9.84375   radio (ISM)  Used as clock in some 315 MHz remote fob and IoT transmitters (multiplied by 32); 13.560 MHz used for 433.92 MHz 9.900   SDTV  SDTV NTSC pixel clock (528×480i@29.97) 10.000     107 allows decade division to 1 Hz and 1 kHz. Common standard frequency. Commonly available as TCXO, the most common OCXO and GPS-disciplined oscillator available. Common stratum 3 Network Time Protocol frequency. Common general microcontroller frequency. Common as cheap ceramic resonators where frequency stability is less concern than cost. 10.106 Amateur Radio A common QRP frequency (30-meter band). Other crystals are 10.116 (QRP), 10.118, 10.120 (SKKC), 10.140 (digital) MHz. See also 7.025 MHz. 10.125   SDTV  SDTV PAL/NTSC pixel clock (544×480i@29.97, 544×576i@25) 10.230 GPS    Found in some GPS receivers. Equals the P(Y) GPS signal chipping rate. 10 times the 1.023 MHz C/A GPS signal chipping rate. Multiplied by 154 to get the 1575.42 MHz L1 frequency and multiplied by 120 to get the 1227.60 MHz L2 frequency. Available as OCXO and TCXO. 10.240 DOCSIS/TD-SCDMA    Allows binary division to 10 kHz (210×10 kHz). Common as a clock in CB radio PLL frequency synthesizers to generate the 5 kHz or 10 kHz reference signal. Used in frequency synthesizers in some cordless phones and in many radio frequency transceivers. Master clock for DOCSIS/EuroDOCSIS. Used in cable modem termination systems. Used to derive symbol and chip rate in conventional TD-SCDMA systems. Available as OCXO and TCXO. 10.245 FM radio    Used in radio receivers; mixes with 10.7 MHz intermediate frequency (IF) yielding 455 kHz signal, a common second IF for FM radio 10.368 DECT 14400   Reference clock for DECT phones. Available as TCXO. Other frequencies are 13.824 and 20.736 MHz. UART clock allows integer division to common baud rates up to 14,400(×16×45) or 28,800(×8×45) 10.416667 Ethernet    Multiplied by 12 to 125 MHz Gigabit Ethernet GMII GTXCLK clock, FDDI clock 10.70 FM radio  radio (filter)  Most common crystal or ceramic resonator for first intermediate frequency filter in FM radio; common in other applications due to ubiquity and low cost, filter bandwidth varies (e.g. ±250/230/180/150/110 kHz to both sides from the 10.7 MHz frequency) 11.0592  230400   UART clock allows integer division to common baud rates up to 230,400(×16×3) or 460,800(×8×3); common clock for Intel 8051 microprocessors 11.2896 14400 audio  Used in CD-DA systems and CD-ROM drives; allows binary division to  (256×44.1 kHz), 22.05 kHz, and 11.025 kHz. DSD256 bitrate (4x2.8224 MHz). Frequencies also used are 16.9344 MHz, 22.5972 MHz, 33.8688 MHz and 45.1584 MHz. UART clock allows integer division to common baud rates up to 14,400(×16×49) and 28,800(×8×49). 11.454544 teletext    Used in some teletext circuits; 2×5.727272 MHz (clock frequency of NTSC M teletext; PAL B uses 6.9375 MHz, SECAM uses 6.203125 MHz, PAL G uses 6.2031 MHz, and PAL I uses 4.4375 MHz clock) 11.520  28800   UART clock allows integer division to common baud rates up to 28,800(×16×25) or 57,600(×8×25). 12.000 USB/CAN    Used in USB 1.0 and 2.0 systems (with accuracy of 500 ppm) as the reference clock for the full-speed PHY rate of 12 Mbit/s, or multiplied up using a PLL to clock high speed PHYs at 480 Mbit/s; common clock for Intel 8051 microprocessors; also used in CAN bus systems. Common general microcontroller frequency. Common as cheap ceramic resonators where frequency stability is less concern than cost. 12.272727   SDTV  Clock rate for exactly square pixels in interleaved 4:3 640×480i@29.97 NTSC video ( MHz). In practice the more commonly available 12.288 MHz frequency is close enough for most applications. 12.288  76800 audio  Digital audio systems - DAT, MiniDisc, sound cards; 256×48 kHz (28×48 kHz). UART clock allows integer division to common baud rates up to 76,800(×16×20) or 256,000(×16×3) 12.352 DS1    8x1.544, the bit clock for DS1 systems (±32 ppm, ANSI T1.102). Available as TCXO and OCXO. 12.40625 teletext    Used in some teletext circuits; 2×6.203125 MHz (clock frequency of SECAM teletext; PAL B uses 6.9375 MHz, NTSC M uses 5.727272 MHz, PAL G uses 6.2031 MHz, and PAL I uses 4.4375 MHz clock) 12.72813   radio (ISM)  Oscillator for 418 MHz FSK/ASK superheterodyne receivers with 10.7 MHz intermediate frequency (less common band used for small RF remote controls), multiplied 32x (12.72813x32+10.7=418)  12.800     Common standard frequency, common reference clock; binary multiple of 100 kHz (128×100 kHz), 50 kHz, 25 kHz, 12.5 kHz. Commonly available as TCXO and OCXO. Common stratum 3 frequency. 12.9024  115200   UART clock allows integer division to common baud rates up to 115,200(×16×7) or 230,400(×8×7) 12.960  1800   UART clock allows integer division to common baud rates up to 1,800(×16×450) or 7,200(×8×225) 13.000 GSM/UMTS    Commonly used as a reference clock for GSM and UMTS handsets. (13 MHz is exactly 48 times the GSM bit rate). Commonly available as TCXO and OCXO. 13.22563   radio (ISM)  Oscillator for 433.92 MHz FSK/ASK superheterodyne receivers with 10.7 MHz intermediate frequency (less common band used for small RF remote controls), multiplied 32x (13.22563*32+10.7=433.12)  13.500   SDTV  Master clock for PAL/NTSC DVD players, Digital TV receivers, etc. (13.5 MHz is an exact multiple of the PAL and NTSC line frequencies); pixel clock for 4:3 SDTV PAL/NTSC (720×480i@29.97, 720×576i@25, 352×480p@59.94). CCIR-601 PAL samplerate (864×625 resolution incl. blanking, or 720×576 visible), CCIR-601 NTSC samplerate (858×525 incl. blanking, 720×480 visible) 13.5168  76800   UART clock allows integer division to common baud rates up to 76,800(×16×11) 13.560 RFID    Common contactless smartcard frequency (ISO/IEC 14443). Also used as clock in some 433.92 MHz remote fob transmitters (multiplied by 32); 9.84375 MHz used for 315 MHz 13.824 DECT 57600   Reference clock for DECT phones. Available as TCXO. UART clock allows integer division to common baud rates up to 57,600(×16×15) or 576,000(×8×3). Other frequencies are 10.368 and 20.736 MHz. 13.875 teletext    Used in some teletext circuits; 2×6.9375 MHz (clock frequency of PAL B teletext; SECAM uses 6.203125 MHz, NTSC M uses 5.727272 MHz, PAL G uses 6.2031 MHz, and PAL I uses 4.4375 MHz clock) 14.048 Amateur Radio A common amateur radio frequency (20-meter band). Other crystals are 14.050 (SKCC), 14.060 (QRP), 14.070 (digital) MHz. See also 7.025 MHz. 14.112  1800 audio  Digital audio systems - 294×48 kHz, 320×44.1 kHz. UART clock allows integer division to common baud rates up to 1,800(×16×490) or 7,2000(×8×245). Available as TCXO. 14.250 FM radio  PAL  used as sampling frequency for ADCs for digitizing the 10.7 MHz intermediate frequency in software-defined radio implementations of AM/FM radio receivers. Pixel clock of some PAL CCD cameras (raw image resolution of 912×625). Used in PAL version in some early Apple computers, e.g. Apple II Europlus. 14.318182   NTSC  NTSC M color subcarrier (4×3.579545 MHz). Common seed clock for modern PC motherboard clock generator chips, clock for ISA bus, also common on CGA and VGA cards and in some 8-bit computers. Exactly 315/22 MHz. 4f(sc) sampling for NTSC or 525/60 (raw image size 910×525, visible 768×475), SMPTE 244M standard. 14.350   NTSC  Pixel clock of some NTSC CCD cameras. 14.400 PDC 7200   UART clock allows integer division to common baud rates up to 7,200(×16×125) or 14,400(×8×125). Also a reference clock for PDC clock. Reference clock of some consumer GPS receivers. 14.7456  921600   UART clock allows integer division to common baud rates up to 921,600(×16×1); common clock for small microcontrollers 14.750   SDTV  Clock rate for exactly square pixels in SDTV PAL 4:3 interleaved 768×576i@25 video ( MHz). In practice the more commonly available 14.7456 MHz frequency is close enough for most applications. 14.850     Used in some transceivers and cellular radios as a reference clock for frequency synthesis. Available as TCXO. 15.000     Used as clock in ZX8301 computer (divided to 7.5 MHz). Frequency used in photoacoustic imaging. Sometimes available as OCXO. Used in dual-frequency 315/390 MHz RF key fobs (multiplied by 21 or 26). 15.360 3G 38400   UART clock allows integer division to common baud rates up to 38,400(×16×25) or 128,000(×8×15). Also used as a 3G reference clock. Used as reference clock in some Bluetooth systems. 15.600     Used in Kenwood TS-590 transceivers. Audio clock allows integer division for 48 ksps. Available as TCXO. 16.000 CAN  HGC  Used in CAN bus systems, some USB devices. 2.4 GHz ISM transceivers. Common general microcontroller frequency (i.e. Arduino Uno and Nano boards). Common as cheap ceramic resonators where frequency stability is less concern than cost. Pixel clock for Hercules Graphics Card. Also used for ZigBee, Bluetooth and BLE, WiFi. 16.200   HDTV  Sampling clock for MUSE HDTV systems (). Rarely used as reference clock in some Bluetooth systems. 16.257   EGA  Pixel clock generator in MGA and EGA video cards (640×350@60 Hz) 16.36760016.36766716.368000 GPS    Commonly used for down-conversion and sampling in GPS-receivers. Generates intermediate frequency signal at 4.092 MHz. 16.3676 or 16.367667 MHz are sometimes used instead of 16.368 MHz to avoid perfect lineup between sampling frequency and GPS spreading code. 16.368 MHz is a reference clock of some consumer GPS receivers. 16.368 MHz is 16 times the 1.023 MHz C/A GPS signal chipping rate; multiplied by 96.25 to get the 1575.42 MHz L1 frequency and multiplied by 75 to get the 1227.60 MHz L2 frequency. 16.369 GPS    Reference clock for some GPS systems. Available as TCXO. 16.375   SDTV  SDTV NTSC 16:9 pixel clock (864×480i@29.97), square pixels (854×480 would be ideal, 864×480 is close enough and a multiple of 16 and 32 for MPEG compression blocks) 16.384  256000   Allows binary division to 1 kHz (214×1 kHz). Reference clock of some consumer GPS receivers. Common audio clock, 256×64 kHz, 512×32 kHz (see also 8.192, 11.2896, 12.288, 18.432, 22.5792, 24.576 MHz). Commonly available as TCXO and OCXO. 16.5888  115200   UART clock allows integer division to common baud rates up to 115,200(×16×9) or 230,400(×8×9). 16.67     Core speed of some microcomputers (relatively common in Motorola 68000 family); bus clock; double to 33.33 MHz, quadruple to 66.67 MHz, multiply by 6 to 100 MHz; IOAPIC clock speed, half the PCI bus frequency 16.777216     224 allows binary division to 1 Hz and 32.768 kHz. Real-time clock; also for DDS generators with 1 Hz step 16.800  1200   Common standard reference frequency for PLL circuits in radio transmitters and receivers, commonly used for frequency synthesis with adjustment in 2.5, 5 or 6.25 kHz steps (6720×5 kHz, 3360×5 kHz or 2688×5.25 kHz). UART clock allows integer division to common baud rates up to 1,200(×16×875) or 2,400(×8×875). Commonly available as TCXO, VCXO and VCTCXO. Used as reference clock in some Bluetooth systems. Reference clock for some GPS systems. 16.9344  7200 audio  Used in CD-DA systems and CD-ROM drives; allows integer division to 44.1 kHz (384×44.1 kHz), 22.05 kHz, and 11.025 kHz. UART clock allows integer division to common baud rates up to 7,200(×16×147) or 14,400(×8×147). 6x2.8224 MHz (DSD64 bitrate). Frequencies also used are 11.2896 MHz, 22.5972 MHz, 33.8688 MHz and 45.1584 MHz. 17.2032 USB 76800 audio PLL conversion by 10/7 to 24.576 MHz and by 21/16 = 22.5792 MHz, which are 256× audio sampling frequencies 48 kHz and 44.1 kHz, respectively. UART clock allows integer division to common baud rates up to 76,800(×16×14). 17.2872   audio  Used in CD-DA systems and CD-ROM drives; allows integer division to 44.1 kHz (392×44.1 kHz), 22.05 kHz, and 11.025 kHz. Frequencies also used are 4.3218 MHz and 8.6436 MHz. 17.328 RDS    The RDS signal bit rate is at 1.1875 kbit/s. While the frequency of 4.332 MHz is the most commonly used crystal resonator, its multiples (2×4.332 MHz = 8.664 MHz or 4×4.332 MHz = 17.328 MHz) have been used also. 17.664 DSL 9600   UART clock allows integer division to common baud rates up to 9,600(×16×115) or 19,200(×8×115); DSL clock: 17.664 MHz (VDSL) ... 8×2.208 MHz (ADSL ADC sampling rate) 17.734475   PAL  PAL B/G/H color subcarrier (4×4.433618 MHz); 4f(sc) sampling for PAL or 625/50, gives 1135×625 pixels incl. blankings, or 948×575 visible 18.000   SDTV/HDTV  SDTV PAL/NTSC pixel clock for 16:9 (960×480i@29.97, 480×480p@59.94, 960×576i@25, 480×576p@50) 18.096 Amateur Radio A WARC band (17-meter), QRP. Another crystal is 18.086 MHz. See also 7.025 MHz, 10.106 MHz. 18.432  576000 audio  UART clock allows integer division to common baud rates up to 230,400(×16×5) or 576,000(×16×2). Audio clock allows integer division for 48 / 96 / 192 ksps. Integer division for 50 Hz and 60 Hz. 18.75 Ethernet    Used to generate 75 MHz (×4) and 150 MHz (×8) clocks. 18.816  4800 audio/DAT  Double the master channel bitrate clock. 9.408 MHz, of Digital Audio Tape systems; 392×48 kHz. The 9.408 MHz clock is divided by 72, 18, 12, and 6 to obtain the pilot, first sync frequency, second sync frequency, and erase frequency. Available as TCXO. 18.9375   PAL  Common CCIR/PAL CCTV camera clock frequency (total frame size 1212×625, incl. blankings, @ 25 Hz) 19.06992919.06993019.06992019.069900   NTSC  Common EIA/NTSC CCTV camera clock frequency (total frame size 1212×525, incl. blankings, @29.97 Hz) 19.200 3G 9600 DVB  UART clock allows integer division to common baud rates up to 9,600(×16×125) or 19,200(×8×125). Also used as a 3G reference clock, due to being a least common multiple of W-CDMA chip rate 3.84 MHz (5x) and 200 kHz channel raster (96x). Commonly available as TCXO and OCXO. Also used in some DVB receiver chipsets. Reference clock of some consumer GPS receivers. Used as reference clock in some Bluetooth systems. Common stratum 3 frequency. Raspberry Pi 3 (and earlier) main clock crystal (54 MHz for Raspberry Pi 4), can be replaced with more accurate source (TCXO, OCXO, GPS-disciplined) if needed. Used in some DECT, GPS, BLE systems. 19.353619.354  115200   3×6.4512 MHz; 63×307.2 kHz; UART clock allows integer division to common baud rates up to 57,600(×16×7×3) or 115,200(×8×7×3). 19.440 DS1/T1/E1, Ethernet 1800   Used in DS1/T1/E1 systems as a packet clock. Used as reference clock in some Bluetooth systems. Commonly available as TCXO and OCXO. Gigabit Ethernet, used to generate 77.76 MHz (×4), 155.52 MHz (×8), 311.04 MHz (×16), 622.08 MHz (×32). 19.53125 Ethernet    Gigabit Ethernet, used to generate 78.125 MHz (×4), 156.25 MHz (×8), 312.5 MHz (×16), 625 MHz (×32); multiplies to 10 GHz MAC-side bitrate, post-serdes; 156.25 MHz = 1/66 of 10.3125 GHz, 1/64 of 10.0 GHz 19.6608 CDMA 76800   Used in CDMA systems (4×4.9152); divided to 1.2288 MHz baseband frequency; UART clock allows integer division to common baud rates up to 38,400(×16×32) or 76,800(×16×16). 19.67   SDTV  SDTV PAL 16:9 pixel clock (WSVGA 1024×576i@25), square pixels 19.680 CDMA 1200   Used in CDMA(IS-95)/CDMA2000 systems; divided to 1.2288 MHz baseband frequency; Used as reference clock in some Bluetooth systems. Commonly available as TCXO. 19.800 CDMA  SDTV  Used in some CDMA systems. Used as reference clock in some Bluetooth systems. SDTV NTSC pixel clock (528×480p@59.94) 20.000 Ethernet 500000   10 Mbit/s Ethernet. Commonly available as TCXO and OCXO. Common stratum 3 Network Time Protocol frequency. Common general microcontroller frequency. Common as cheap ceramic resonators where frequency stability is less concern than cost. Allows binary division to 10 MHz. Used in some WiFi and Bluetooth systems. 20.141601 Ethernet    Gigabit Ethernet. Used to generate 80.566406 MHz (×4) or 161.132812 MHz (×8), 1/128 and 1/64 of 10.3125 GHz of copper Gigabit Ethernet wire bit rate 20.25 TV/MAC  PAL/NTSC/SDTV  Common sampling rate of luma+chroma video components in the Multiplexed Analogue Components standard. Pixel clock for SDTV PAL/NTSC (544×480p@59.94, 544×576p@50). 20.2752  115200   UART clock allows integer division to common baud rates up to 115,200(×16×11) or 230,400(×8×11). 20.480  256000   Allows binary division to 10 kHz (211×10 kHz). Commonly available as TCXO and OCXO. 20.736 DECT 28800   Reference clock for DECT phones. Available as TCXO. Other frequencies are 10.368 and 13.824 MHz. 21.050 Amateur Radio A common QRP frequency (15-meter band), SKCC. Other crystal is 21.060 MHz. See also 7.025 MHz. 21.47727   NTSC  NTSC M color subcarrier (6×3.579545 MHz). Common seed clock for many older computer systems, e.g. the NTSC-region NES, divided by 12 to CPU clock (1.789773 MHz); see 26.601712 MHz for PAL NES systems. 22.1184  460800   UART clock allows integer division to common baud rates up to 460,800(×16×3) or 921600(×8×3). Twice the 11.0592 MHz frequency. 22.5792 28800 audio  Used in CD-DA systems and CD-ROM drives; allows binary division to 44.1 kHz (512×44.1 kHz), 22.05 kHz, and 11.025 kHz. DSD512 bitrate (8x2.8224 MHz). Frequencies also used are 11.2896 MHz, 16.9344 MHz, 33.8688 MHz and 45.1584 MHz. UART clock allows integer division to common baud rates up to 28,800(×16×49) or 57,800(×8×49). 22.625     Used in Yaesu FT-817, FT-857, and FT-897 transceiver. Available as TCXO. 23.104 GPS    Reference clock for some GPS systems. Available as TCXO. 23.9616  115200   UART clock allows integer division to common baud rates up to 115,200(×16×13) or 230,400(×8×13). 24.000 USB Bluetooth headphones 500000   High-speed USB (24 MHz × 20 = 480Mbit/s); LCD monitor some MCU also Bluetooth headphones. Used in some WiFi, Bluetooth and BLE systems. 24.54   SDTV  SDTV NTSC 4:3 pixel clock (640×480p@59.94) 24.5535 GPS    Reference clock for some GPS systems. Available as TCXO. Almost 24 times the 1.023 MHz C/A code chipping rate. 24.576 FireWire  256000 audio  Digital audio systems - DAT, MiniDisc, AC'97, sound cards; 512×48 kHz (29×48 kHz); also used as bus reference clock in FireWire systems (with accuracy of 100 ppm). 3x8.192 MHz. 49.1520 MHz (2x24.576) also used. Also a crystal for systems handling CCIR-601 SDTV video (here see also 26.8 MHz). 24.704 DS1    16x1.544, the bit clock for DS1 systems (±32 ppm, ANSI T1.102). Available as TCXO and OCXO. 24.906 Amateur Radio A common QRP frequency (12-meter band). See also 7.025 MHz. 25.000 Ethernet    Fast Ethernet MII clock (100 Mbit/s/4-bit nibble) (with accuracy of 100 ppm); also multiplied by 5 to 125 MHz Also used on some laptop optical drives Gigabit Ethernet GMII GTXCLK clock, FDDI clock; used as input for 100 MHz PCI Express clock generators Used in some ISM radio systems. 25.175   VGA  Common Video Graphics Array pixel clock (i.e., 320/640×200/350/400@70 (320×200@70 Hz, 640×200@70, 320×350@70, 640×350@70, 640×400@70, VGA 640×480@60), all 31.46875 kHz horizontal)  25.8048  230400   UART clock allows integer division to common baud rates up to 230,400(×16×7) or 460,800(×8×7) 26.000 GSM/UMTS  DVB   Commonly used as a reference clock for GSM and UMTS/3G handsets. (26 MHz is exactly 96 times the GSM bit rate). Commonly available as TCXO and OCXO. Also used in some DVB receiver chipsets used on portable DVD players. Reference clock of some consumer GPS receivers. Used in Long-CZ J8, Motorola F3 phones and some early Bluetooth USB dongles. Common with ESP8266 and ESP32 chips (40 MHz is also supported). Used in some WiFi, WLan, Bluetooth, BLE, NFC and GSM systems. 26.2144     Popular for 102.4 kS/s, 204.8 kS/s or similar sampling systems, when a power-of-two size FFT follows the sampling. In this case the FFT ''frequency bins'' end up to be at "nice" frequencies for humans. Also allows integer division to 25 Hz and multiples of 25 Hz (50 Hz, 100 Hz, 200 Hz); 26.2144 MHz = 100×218 = 25×220.26.5625 Fibre Channel    Quadrupled to 106.250 MHz Fibre Channel clock 26.601712   PAL  6x the 4.43361875 color subcarrier frequency; clock crystal of the PAL region NES consoles, divided by 16 to CPU clock (1.662607 MHz), see 21.47727 MHz for NTSC region systems 26.800   SDTV  Common crystal in SDTV video handling systems (especially NTSC, square-pixel, or dual-mode systems; CCIR601 systems also use 24.576 MHz) 26.8436 Digital signal generator    Exact frequency is 2^28/10 Hz. Used to drive a DDS synthesizer with 28-bit accumulator; gives output from 0 to 2.68435 MHz in 0.1 Hz steps. Instek SFG-1000 series is one example. 26.975 RC    27 MHz band, band 0/1 (grey/brown), "split" frequency; radio-controlled models of cars, boats, aircraft 26.995 RC    27 MHz band, band 1 (brown); radio-controlled models of cars, boats, aircraft 27.000   SDTV  Master clock for PAL/NTSC DVD players, Digital TV receivers, some modems etc. (27 MHz is an exact multiple of the PAL and NTSC line frequencies). Master clock for MPEG-2 video systems (also uses multiples - 54 MHz, 81 MHz). Pixel clock for SDTV (720×480p@59.94, 720×576p@50), divides by 2 to 13.5 MHz clock (720×480i@59.94, 720×576i@25) and by 4 to 6.75 MHz, very common 27.025 RC    27 MHz band, band 1/2 (brown/red), "split" frequency; radio-controlled models of cars, boats, aircraft 27.045 RC    27 MHz band, band 2 (red); some radio-controlled models of cars, boats, aircraft 27.075 RC    27 MHz band, band 2/3 (red/orange), "split" frequency; radio-controlled models of cars, boats, aircraft 27.095 RC    27 MHz band, band 3 (orange); some radio-controlled models of cars, boats, aircraft 27.12 RFID    Twice 13.56 MHz, common contactless smartcard frequency (ISO/IEC 14443). Used in RFID/NFC systems. 27.125 RC    27 MHz band, band 3/4 (orange/yellow), "split" frequency; radio-controlled models of cars, boats, aircraft; common crystal in vintage walkie talkies 27.145 RC    27 MHz band, band 4 (yellow); some radio-controlled models of cars, boats, aircraft; gate and garage door remote controls; toy walkie talkies; between channels 15 and 16 of the CB radio 27.175 RC    27 MHz band, band 4/5 (yellow/green), "split" frequency; radio-controlled models of cars, boats, aircraft 27.195 RC    27 MHz band, band 5 (green); radio-controlled models of cars, boats, aircraft 27.225 RC    27 MHz band, band 5/6 (green/blue), "split" frequency; radio-controlled models of cars, boats, aircraft 27.255 RC    27 MHz band, band 6 (blue); some radio-controlled models of cars, boats, aircraft 27.456 GPS    Reference clock for some GPS systems. Available as TCXO. 27.648 DECT 115200   UART clock allows integer division to common baud rates up to 115,200(×16×15) or 576,000(×16×3). Twice the 13.824 MHz of DECT master clock. 28.060 Amateur Radio A common QRP frequency (10-meter band). See also 7.025 MHz. 28.3046 3270  Twelve times the coax bit rate of IBM 3270 networks. 28.224 modems 7200 audio  UART clock allows integer division to common baud rates up to 7,200(×16×245) or 14,400(×8×245); used in some faxes and modems; modem and fax rates (504×56000, 580×48000, 840×33600, 980×28800, 1960×14400, 2352×12000, etc. ); also divides to common audio frequencies (147×192000, 588×48000, 640×44100, 1280×22050, 2560×11025) 28.322   VGA  Common Video Graphics Array pixel clock (i.e., 720×350/400@70 Hz, 31.46889 kHz horizontal) 28.37516  28.375   PAL  Master clock for some PAL CCD cameras; 2 periods per pixel, 1816 periods per scan line, 567500 periods per frame. With frequency of 28.37516 video clock for all PAL Amiga computers. 28.636363   NTSC  Master clock for some NTSC CCD cameras. Video clock for all NTSC Amiga computers. Twice the 14.31818 MHz frequency, shares its other uses, e.g. seed clock of PC ISA bus. Exactly 315/11 MHz. 8×3.598545 MHz of the NTSC colorburst. Used in some microcontroller based NTSC console emulators. See 35.46895 MHz for corresponding PAL systems. 28.800  14400 DVB-T  Used in some DVB-T USB dongle TV receivers, namely the RTL-SDR ones used for software-defined radio. UART clock allows integer division to common baud rates up to 14,400(×16×125) or 28,800(×8×125). 29.4912  921600   UART clock allows integer division to common baud rates up to 921,600(×16×2). 29.50   SDTV  SDTV PAL 4:3 pixel clock (768×576p@50), square pixels 30.000     Common CPU clock. Used in some ISM wireless systems. 30.240   VGA  Early Macintosh video pixel clock (VGA 640×480@66 Hz) 30.720 3G 38400   A 3G reference clock; twice the 15.36 MHz, 8x the 3.84 MHz WCDMA chip rate. Reference clock in W-CDMA systems; can be multiplied by 16 to 491.52 MHz common for driving DACs in WCDMA wireless base stations or by 32 to 983.04 MHz for UMTS base stations or by 8 to 245.76 MHz, other common DAC sampling frequency. UART clock; allows integer division to common baud rates (800×38400 baud or 800×32×1,200 baud). Available as VCXO, TCXO and OCXO. 31.3344  115200   UART clock; allows integer division to common baud rates (272×115200 baud or 272×96×1,200 baud). CPU frequency or multiple of it (as well as video and system master clocks) in older Apple Macintosh computers (Classic, LC, etc.). 31.50   VGA  VGA pixel clock (VESA modes 640×350@85, 640×400@85, VGA 640×480@72/75, all hsync 37.9 kHz) 32.000 LoRa    common crystal for LoRa RF chips by Semtech, available as TCXO; also used for Zigbee, 6LowPan, RF4CE, Bluetooth and BLE 32.75   SDTV  SDTV NTSC pixel clock (864×480p@59.94, close to FWVGA) 32.768     Allows binary division to 1 kHz (215×1 kHz). Reference clock of some consumer GPS receivers. Commonly available as TCXO and OCXO. 33.1776  115200   UART clock; allows integer division to common baud rates. (288×115200 baud or 288×96×1,200 baud) 33.33     Common CPU clock, PCI bus clock 33.554432     225 allows binary division to 1 Hz and 32.768 kHz. Real-time clock; also for DDS generators with 1 Hz step 33.8688  115200 audio  Used in CD-DA systems and CD-ROM drives; allows integer division to 44.1 kHz (768×44.1 kHz), 22.05 kHz, and 11.025 kHz. 12x2.8224 MHz (DSD64 bitrate). Also allows integer division to common UART baud rates up to 115200.Available as a TCXO. Frequencies also used are 11.2896 MHz, 16.9344 MHz, 22.5972 MHz and 45.1584 MHz. 34.368 E3 38400   E3 data rate clock. UART clock; allows integer division to common baud rates. (895×38400 baud or 895×32×1200 baud) 34.950  RC     35 MHz band, channel 55;  radio-controlled models of aircraft 34.960  RC     35 MHz band, channel 56;  radio-controlled models of aircraft; VGA pixel clock (GTF mode PAL 768×576@60, hsync 35.82 kHz) 34.970  RC     35 MHz band, channel 57; radio-controlled models of aircraft 34.980  RC     35 MHz band, channel 58; radio-controlled models of aircraft 34.990  RC     35 MHz band, channel 59; radio-controlled models of aircraft 35.000  RC     35 MHz band, channel 60;  radio-controlled models of aircraft 35.010  RC     35 MHz band, channel 61;  radio-controlled models of aircraft 35.020  RC     35 MHz band, channel 62;  radio-controlled models of aircraft 35.0208  115200   UART clock; allows integer division to common baud rates. (304×115200 baud or 304×96×1,200 baud) 35.030  RC     35 MHz band, channel 63;  radio-controlled models of aircraft 35.040  RC     35 MHz band, channel 64;  radio-controlled models of aircraft 35.050  RC     35 MHz band, channel 65;  radio-controlled models of aircraft 35.060  RC     35 MHz band, channel 66; radio-controlled models of aircraft 35.070  RC     35 MHz band, channel 67;  radio-controlled models of aircraft 35.080  RC     35 MHz band, channel 68;  radio-controlled models of aircraft 35.090  RC     35 MHz band, channel 69; radio-controlled models of aircraft 35.100  RC     35 MHz band, channel 70;   radio-controlled models of aircraft 35.110  RC     35 MHz band, channel 71;   radio-controlled models of aircraft 35.120  RC     35 MHz band, channel 72;  radio-controlled models of aircraft 35.130  RC     35 MHz band, channel 73;   radio-controlled models of aircraft 35.140  RC     35 MHz band, channel 74;   radio-controlled models of aircraft 35.150  RC     35 MHz band, channel 75;  radio-controlled models of aircraft 35.160  RC     35 MHz band, channel 76; radio-controlled models of aircraft 35.170  RC     35 MHz band, channel 77; radio-controlled models of aircraft 35.180  RC     35 MHz band, channel 78; radio-controlled models of aircraft 35.190  RC     35 MHz band, channel 79;  radio-controlled models of aircraft 35.200  RC     35 MHz band, channel 80;   radio-controlled models of aircraft 35.210  RC     35 MHz band, channel 81;   radio-controlled models of aircraft 35.220  RC     35 MHz band, channel 82;   radio-controlled models of aircraft 35.230  RC     35 MHz band, channel 83;  radio-controlled models of aircraft 35.240  RC     35 MHz band, channel 84;   radio-controlled models of aircraft 35.250  RC     35 MHz band, channel 85; radio-controlled models of aircraft 35.2512  115200   UART clock; allows integer division to common baud rates. (306×115200 baud or 306×96×1,200 baud) 35.260  RC     35 MHz band, channel 86; radio-controlled models of aircraft 35.270  RC     35 MHz band, channel 87; radio-controlled models of aircraft 35.280  RC     35 MHz band, channel 88; radio-controlled models of aircraft 35.290  RC     35 MHz band, channel 89; radio-controlled models of aircraft 35.300  RC     35 MHz band, channel 90; radio-controlled models of aircraft 35.328 DSL 38400   UART clock; allows integer division to common baud rates. (64×552000 baud, 256×138000 baud, 460×38400 baud or 460×32×1,200 baud); DSL clock: 2×17.664 MHz (VDSL) ... 16×2.208 MHz (ADSL ADC sampling rate) 35.46895  35.468   PAL  8×4.43361875 MHz of the PAL colorburst (color subcarrier). Used in some microcontroller based PAL console emulators. See 28.6363 MHz for the corresponding NTSC systems. 35.50   VGA  VGA pixel clock (VESA mode 720×400@85, hsync 37.9 kHz) 36.000   VGA/SDTV  Video Graphics Array pixel clock (VESA modes VGA 640×480@85 with hsync 43.3 kHz, SVGA 800×600@56 with hsync 35.2 kHz. Pixel clock for SDTV PAL/NTSC (FWVGA 960×480p@59.94, 960×576p@50). 36.864  460800 audio  UART clock allows integer division to common baud rates up to 460,800(×16×5). Audio clock allows integer division for 48 / 96 / 192 ksps. 37.400 Used in some WiFi and Bluetooth systems. 38.400 3G 38400 DVB  UART clock; allows integer division to common baud rates (500×38,400 baud or 500×32×1,200 baud). Also used as a 3G reference clock, due to being a second (2×19.2 MHz) least common multiple of W-CDMA chip rate 3.84 MHz (5x) and 200 kHz channel raster (96x). Also used in some DVB receiver chipsets. Used as reference clock in some Bluetooth systems, DECT phones, WiFi. 38.88 DS1/T1/E1    Used in DS1/T1/E1 systems as a packet clock (2×19.44 MHz). Commonly available as TCXO and OCXO. 39.000 GSM/UMTS    3×13 MHz. Commonly used as a reference clock for GSM and UMTS handsets. (39 MHz is exactly 144 times the GSM bit rate). Available as TCXO. 39.33   SDTV  SDTV PAL 16:9 pixel clock (1024 WSWGA, 1024×576p@50), square pixels 40.000     Common CPU clock, WiFi, OFDM. FPU oscillator for Commodore A3630 card and found in dual band miniPCIe WiFi cards. VGA pixel clock (VESA mode SVGA 800×600@60 with hsync 37.9 kHz). Allows binary division to 10 MHz. Used with ESP8266 and ESP32 chips (26 MHz is also supported and seems more common). Used in some WiFi, Bluetooth and BLE, RFID/NFC, SimpleLink systems. 40.320  115200   UART clock; allows integer division to common baud rates. (350×115200 baud or 350×96×1,200 baud) 40.655  RC     40 MHz band, channel 50; radio-controlled models of cars, boats 40.665  RC     40 MHz band, channel 66; radio-controlled models of cars, boats 40.675  RC     40 MHz band, channel 51; radio-controlled models of cars, boats 40.680         common crystal in garage door remotes and other remote controls; multiply by 32/3 to 433.92 MHz 40.685  RC     40 MHz band, channel 52; radio-controlled models of cars, boats 40.695  RC     40 MHz band, channel 53; radio-controlled models of cars, boats 40.705  RC     40 MHz band, channel 70; radio-controlled models of cars, boats 40.715  RC     40 MHz band, channel 54; radio-controlled models of cars, boats 40.725  RC     40 MHz band, channel 55; radio-controlled models of cars, boats 40.735  RC     40 MHz band, channel 56; radio-controlled models of cars, boats 40.745  RC     40 MHz band, channel 74; radio-controlled models of cars, boats 40.755  RC     40 MHz band, channel 75; radio-controlled models of cars, boats 40.765  RC     40 MHz band, channel 57; radio-controlled models of cars, boats 40.775  RC     40 MHz band, channel 58; radio-controlled models of cars, boats 40.775  RC     40 MHz band, channel 77; radio-controlled models of cars, boats 40.785  RC     40 MHz band, channel 59; radio-controlled models of cars, boats 40.795  RC     40 MHz band, channel 79; radio-controlled models of cars, boats 40.805  RC     40 MHz band, channel 80; radio-controlled models of cars, boats 40.815  RC     40 MHz band, channel 81; radio-controlled models of cars, boats 40.825  RC     40 MHz band, channel 82; radio-controlled models of cars, boats 40.835  RC     40 MHz band, channel 83; radio-controlled models of cars, boats 40.875  RC     40 MHz band, channel 85; radio-controlled models of cars, boats 40.885  RC     40 MHz band, channel 86; radio-controlled models of cars, boats 40.915  RC     40 MHz band, channel 87; radio-controlled models of cars, boats 40.935  RC     40 MHz band, channel 93; radio-controlled models of cars, boats 40.945  RC     40 MHz band, channel 94; radio-controlled models of cars, boats 40.960     Allows binary division to 10 kHz (212×10 kHz) 40.975  RC     40 MHz band, channel 91;  radio-controlled models of cars, boats 40.985  RC     40 MHz band, channel 92;  radio-controlled models of cars, boats 40.985  RC     40 MHz band, channel 98;  radio-controlled models of cars, boats 42.93   VGA  VGA pixel clock (GTF mode PAL 768×576@72, hsync 43.27 kHz) 43.16   VGA  VGA pixel clock (GTF mode VGA 640×480@100, hsync 50.9 kHz) 44.736 DS3 38400   DS3 data rate clock. UART clock; allows integer division to common baud rates. (1165×38400 baud or 1165×32×1200 baud) 44.90   VGA  VGA pixel clock (industry standard XGA 1024×768i@43, hsync 35.5 kHz) 45.1584  57600 audio  Used in CD-DA systems and CD-ROM drives; allows binary division to 44.1 kHz (1024×44.1 kHz), 22.05 kHz, and 11.025 kHz. 16x2.8224 MHz (DSD rate). UART clock allows integer division to common baud rates up to 57,600(×16×49) or 115,200(×8×49). Available as a TCXO. Frequencies also used are 11.2896 MHz, 16.9344 MHz, 22.5972 MHz and 33.8688 MHz. 45.51   VGA  VGA pixel clock (GTF mode PAL 768×576@75, hsync 45.15 kHz) 48.000 USB  VGA/HDTV  found in old VGA cards, High-speed USB (48 MHz × 10 = 480Mbit/s). HDTV pixel clock (1280×1080i@25), variant compatible with CRT-based 31.250 kHz horizontal deflection HDTVs. Used in some WiFi and Bluetooth systems. 49.1520 FireWire  audio  Digital audio systems - DAT, MiniDisc, AC'97, sound cards; 1024×48 kHz (210×48 kHz); also used as bus reference clock in FireWire systems (with accuracy of 100 ppm). Twice the more-standard frequency of 24.576 MHz. 6x8.192 MHz. Available as TCXO. 49.408 DS1    32x1.544, the bit clock for DS1 systems (±32 ppm, ANSI T1.102). 49.450549   HDTV  HDTV NTSC pixel clock (1280×1080i@29.97, 1280×1080p@29.97); 49.5/1.001 49.500   HDTV  HDTV ATSC pixel clock (1280×1080i@25/30, 1280×1080p@24/25/30). VGA pixel clock (VESA 800×600@75, hsync 46.9 kHz) 49.83049.86049.890 RC    toy remote controls, walkie-talkies 50.000 Ethernet    Fast Ethernet (2×25 MHz), VGA pixel clock (VESA mode 800×600@72, hsync 48.1 kHz) PCI Express clock source, doubled to 100 MHz. Amigakit ZorRAM memory cards. 50.09 Amateur Radio A common QRP frequency (6-meter band). Other crystal can be 50.4 MHz. 3rd overtone. See also 7.025 MHz. 51.840 SONET 115200 VGA  UART clock; allows integer division to common baud rates. (450×115200 baud or 450×96×1,200 baud); SONET STS-1 frequency (with accuracy of 20 =ppm); VGA pixel clock (GTF mode 768×576@85, hsync 51.42 kHz). Can be generated from 6.48 MHz xtal. 52.000     Used in some WiFi, WLAN and GSM systems. 52.416 modems 115200   UART clock; allows integer division to common baud rates. (455×115200 baud or 455×96×1,200 baud) and to modem and fax rates (936×56000, 1092×48000, 1560×33600, 1820×28800, 3640×14400, 4368×12000, etc. ); also divides to some common audio frequencies (273×192000, 1092×48000) 53.125 Fibre Channel    Fibre Channel clock 54.000   PAL/NTSC/HDTV  Raspberry Pi 4 (BCM2711) main clock crystal (19.2 MHz for Raspberry Pi 3 and earlier). Clock for digital video systems (27 MHz is an exact multiple of the PAL and NTSC line frequencies). 2x the 27 MHz master clock for MPEG-2 video systems (see also 81 MHz). HDTV pixel clock (1440×1080i@25), variant compatible with CRT-based 31.250 kHz horizontal deflection HDTVs. 55.6319   HDTV  HDTV NTSC pixel clock (4:3 1440×1080i@29.97, 1440×1080p@23.976/29.97); 55.6875/1.001 55.6875   HDTV  HDTV ATSC pixel clock (4:3 1440×1080i@25/30, 1440×1080p@24/25/30) 56.30   VGA  VGA pixel clock (VESA mode SVGA 800×600@85, hsync 53.7 kHz) 56.448 modems 115200   2×28.224 MHz; used in some faxes and modems; UART clock, allows integer division to common baud rates (490×115200, 1024×38400, 2048×19200, etc.) and to modem and fax rates (1008×56000, 1160×48000, 1680×33600, 1960×28800, 3920×14400, 4704×12000, etc. ); also divides to common audio frequencies (294×192000, 1176×48000, 1280×44100, 2560×22050, 5120×11025) 61.440 WCDMA/3G    Used in wireless base stations; 2x30.72 MHz 62.57   VGA  VGA pixel clock (GTF mode PAL 768×576@100, hsync 61.1 kHz) 65.00   VGA  VGA pixel clock (VESA mode XGA 1024×768@60, hsync 48.4 kHz) 66.667     common CPU clock, PCI bus clock 67.108864     226 allows binary division to 1 Hz and 32.768 kHz. Real-time clock; also for DDS generators with 1 Hz step 68.18   VGA  VGA pixel clock (GTF mode SVGA 800×600@100, hsync 63.6 kHz) 70.656 DSL 38400   (2x35.328) UART clock; allows integer division to common baud rates. (128×552000 baud, 512×138000 baud, 920×38400 baud or 920×32×1,200 baud);DSL clock: 4×17.664 MHz (VDSL) ... 32×2.208 MHz (ADSL ADC sampling rate) 72.000   HDTV  HDTV pixel clock (FHD/2K 1920×1080i@25), variant compatible with CRT-based 31.250 kHz horizontal deflection HDTVs 74.175824274.176   HDTV  HDTV NTSC pixel clock (HD/WXGA 1280×720p@23.976/29.97/59.94, 1920×1080i@29.97, 1920×1080p@23.976/29.97); 74.25/1.001; very common Multiply by 91/250 to get 27 MHz. 74.250   HDTV  HDTV ATSC pixel clock (HD/WXGA 1280×720p@24/25/30/50/60, 1920×1080i@25/30, 1920×1080p@24/25/30); very common; also 1920×1080i@25, variant compatible with CRT-based 31.250 kHz horizontal deflection HDTVs. Multiply by 4/11 to get 27 MHz. 75.0   VGA  VGA pixel clock (VESA mode XGA 1024×768@70, hsync 56.5 kHz) 77.760 SONET/SDH 115200   UART clock; allows integer division to common baud rates. (675×115200 baud or 675×96×1,200 baud). Commonly available as TCXO and OCXO. Multiplies to clock for communication for SONET/SDH/ATM, 1.5×51.840 MHz (SONET STS-1 frequency). Can be generated from 19.44 MHz xtal. 78.125 Ethernet    Gigabit Ethernet, multiplies to 10 GHz MAC-side bitrate, post-serdes; 78.125 MHz = 1/132 of 10.3125 GHz, 1/128 of 10.0 GHz; often generated from 19.53125 MHz xtal 78.8   VGA  VGA pixel clock (VESA mode XGA 1024×768@75, hsync 60.0 kHz) 80.000   audio  common CPU clock; used in some audio applications, available as TCXO. Allows binary division to 10 MHz. 80.566406 Ethernet    Gigabit Ethernet. Multiplies (×128) to 10.3125 GHz, copper wire bit rate. Can be generated from 20.141601 xtal. 81.000   PAL/NTSC/SDTV  Clock for digital video systems (27 MHz is an exact multiple of the PAL and NTSC line frequencies). 3x the 27 MHz master clock for MPEG-2 video systems (see also 81 MHz). 81.62   VGA  VGA pixel clock (GTF mode XGA+ 1152×864@60, hsync 53.70 kHz) 83.46   VGA  VGA pixel clock (GTF mode WXGA 1280×800@60, hsync 49.68 kHz) 85.86   VGA  VGA pixel clock (GTF mode FWXGA 1368×768@60, hsync 47.7 kHz) 88.75   VGA  VGA pixel clock (WXGA+ 1440×900@60) 92.160 WCDMA/3G    Used in wireless base stations; 3x30.72 MHz 94.5   VGA  VGA pixel clock (VESA mode XGA 1024×768@85, hsync 68.7 kHz) 98.901099   HDTV  HDTV NTSC pixel clock (1280×1080p@59.94); 2x49.450549, 99/1.001 99.000   HDTV  HDTV ATSC pixel clock (1280×1080p@50/60) 100.000     108 allows decade division to 1 Hz and 1 kHz. PCI Express clock. Standard frequency, available as OCXO. 106.250 Fibre Channel    Fibre Channel clock for 1.0625 gigabaud rate 106.47   VGA  VGA pixel clock (GTF mode WXGA+ 1440×900@60, hsync 55.92 kHz) 106.5 radio    Used as an IF LO in microwave transceivers, e.g. on the amateur 10 GHz band. Multiplied by 96 to produce 10.224 GHz signal. Available as OCXO. 108.0   VGA  VGA pixel clock (VESA modes XGA+ 1152×864@75 with hsync 675 kHz, SXGA-/UVGA 1280×960@60 with hsync 60.0 kHz, SXGA 1280×1024@60 with hsync 64 kHz) 111.2638   HDTV  HDTV NTSC pixel clock (4:3 1440×1080p@59.94); 111.375/1.001 111.375   HDTV  HDTV ATSC pixel clock (4:3 1440×1080p@50/60); 2x55.6875 113.31   VGA  VGA pixel clock (GTF mode XGA 1024×768@100, hsync 81.4 kHz) 116 radio    Used as an IF LO in 144 MHz transverters. Available as TCXO. Sometimes used as GPS-disciplined OCXO. 119.65   VGA  VGA pixel clock (GTF mode XGA+ 1152×864@85, hsync 77.1 kHz) 122.61   VGA  VGA pixel clock (GTF mode SXGA+ 1400×1050@60, hsync 65.22 kHz) 122.880 WCDMA/3G    Standard frequency, available as TCXO, VCXO. Used in wireless base stations; 4x30.72 MHz 124.54   VGA  VGA pixel clock (GTF mode SXGA-/UVGA 1280×960@72, hsync 72.07 kHz) 125.000 Ethernet    Gigabit Ethernet GMII GTXCLK clock, FDDI clock 129.86   VGA  VGA pixel clock (GTF mode SXGA-/UVGA 1280×960@75, hsync 75.15 kHz) 134.217728     227 allows binary division to 1 Hz and 32.768 kHz. Real-time clock; also for DDS generators with 1 Hz step 135.0   VGA  VGA pixel clock (VESA mode SXGA 1280×1024@75, hsync 80.0 kHz) 143.47   VGA  VGA pixel clock (GTF mode XGA+ 1152×864@100, hsync 91.5 kHz) 147.14   VGA  VGA pixel clock (GTF mode WSXGA+ 1680×1050@60, hsync 65.22 kHz) 148.351648   HDTV  SMPTE 424, HDTV NTSC pixel clock (FHD/2K 1920×1080p@59.94); 148.5/1.001.Multiply by 91/500 to get 27 MHz. 148.5   HDTV/HDMI  SMPTE 424, HDTV ATSC pixel clock (FHD/2K 1920×1080p@50/60); 2x74.25.VGA pixel clock (VESA mode 1280×960@85, hsync 85.9 kHz). Standard HDMI pixel clock (4k YUV 4:2:0@30). Multiply by 4/22 to get 27 MHz. 149.34   VGA  VGA pixel clock (GTF mode SXGA+ 1400×1050@72, hsync 78.77 kHz) 150.000     common reference oscillator, TCXO 153.600 WCDMA/3G    Standard frequency. Used in wireless base stations, available as TCXO, VCXO. 5x30.72 MHz. Popular frequency of SAW filters for intermediate frequency in microwave systems. 154.0   VGA  VGA pixel clock (WUXGA 1920×1200@60) 155.520 SONET/SDH    3×51.840 MHz (SONET STS-1 frequency), SONET/SDH clock. Can be generated from 19.44 MHz xtal. 155.85   VGA  VGA pixel clock (GTF mode SXGA+ 1400×1050@75, hsync 82.2 kHz) 156.25 Ethernet    10 Gigabit Ethernet clock, 64-bit signal Multiplies by 64 to 10.0 GHz (MAC-side serial bitrate) or by 66 to 10.3125 GHz (wire-side serial bitrate, after encoding). In video-over-IP systems, often with 148.5 and 148.351648 MHz. 157.5   VGA  VGA pixel clock (VESA mode SXGA 1280×1024@85, hsync 91.1 kHz) 161.132812 Ethernet    Gigabit Ethernet, 66-bit signal. Multiplies (×64) to 10.3125 GHz, copper wire bit rate. Can be generated from 20.141601 xtal. 162.0   VGA  VGA pixel clock (VESA mode UXGA 1600×1200@60, hsync 75.0 kHz) 165.0   HDMI/DVI  HDMI/DVI serial clock for 1080p@60 (TMDS encoding) 175.5   VGA  VGA pixel clock (VESA mode UXGA 1600×1200@65, hsync 81.3 kHz) 178.99   VGA  VGA pixel clock (GTF mode SXGA-/UVGA 1280×960@100, hsync 101.7 kHz) 179.26   VGA  VGA pixel clock (GTF mode SXGA+ 1400×1050@85, hsync 93.76 kHz) 184.320 WCDMA/3G    Used in wireless base stations; 6x30.72 MHz 187.50 Ethernet    10x18.75 MHz; see also 75 MHz, 150 MHz 189.0   VGA  VGA pixel clock (VESA mode UXGA 1600×1200@70, hsync 87.5 kHz) 190.96   VGA  VGA pixel clock (GTF mode SXGA 1280×1024@100, hsync 108.5 kHz) 193.16   VGA  VGA pixel clock (GTF mode WUXGA 1920×1200@60, hsync 74.52 kHz) 196.608 E1    Allows division to 1 kHz (3×2^16×1 kHz). Bit clock for E1 systems. 48x4.096 MHz, 96x2.048 MHz. 202.5   VGA  VGA pixel clock (VESA mode UXGA 1600×1200@75, hsync 93.8 kHz) 204.8   VGA  VGA pixel clock (VESA mode 1792×1344@60, hsync 83.6 kHz) 214.39   VGA  VGA pixel clock (GTF mode SXGA+ 1400×1050@100, hsync 111.2 kHz) 218.3   VGA  VGA pixel clock (VESA mode 1856×1392@60, hsync 86.3 kHz) 229.5   VGA  VGA pixel clock (VESA mode UXGA 1600×1200@85, hsync 106.3 kHz) 234.0   VGA  VGA pixel clock (VESA mode 1920×1440@60, hsync 90.0 kHz) 234.59   VGA  VGA pixel clock (QHD 2560×1440@60) 261.0   VGA  VGA pixel clock (VESA mode 1792×1344@75, hsync 106.3 kHz) 268.435456     228 allows binary division to 1 Hz and 32.768 kHz. Real-time clock; also for DDS generators with 1 Hz step 280.64   VGA  VGA pixel clock (GTF mode UXGA 1600×1200@100, hsync 127.1 kHz) 288.0   VGA  VGA pixel clock (VESA mode 1856×1392@75, hsync 112.5 kHz) 297.0   VGA/HDMI  VGA pixel clock (VESA mode 1920×1440@75, hsync 112.5 kHz). High-speed HDMI pixel clock (2x148.5, 4k YUV 4:2:0@60, RGB@30). 311.04 SONET/SDH    6×51.840 MHz (SONET STS-1 frequency), SONET/SDH clock. 312.5 Ethernet    Gigabit Ethernet, multiplies (×32) to 10 GHz MAC-side bitrate, or (×33) to 10.3125 GHz copper-wire serial bitrate; often generated from 19.53125 MHz xtal 312.787   VGA  VGA pixel clock (21.5:9 3440×1440@60)    radio (ISM)  SAW resonators for Chinese 315 MHz ISM band RF remote control fobs 322.265625 Ethernet    Gigabit Ethernet, PHY, 66-bit signal. Multiplies (×32) to 10.3125 GHz, copper wire bit rate. Can be generated from 20.141601 xtal. 336.375   VGA  VGA pixel clock (QHD 2560×1440@85)    radio (ISM)  SAW resonators for 433.92 MHz ISM band RF remote control fobs 448.5   VGA  VGA pixel clock (21.5:9 3440×1440@85) 483.120   VGA  VGA pixel clock (QHD 2560×1440@120) 531.52   VGA  VGA pixel clock (4K UHD 3440×1440@100) 533.250   VGA  VGA pixel clock (4K UHD 3840×2160@60) 586.586   VGA  VGA pixel clock (QHD 2560×1440@144) 622.08 SONET/SDH    12×51.840 MHz (SONET STS-1 frequency), SONET/SDH clock. 625.0 Ethernet    Gigabit Ethernet, multiplies (×16) to 10 GHz MAC-side bitrate 644.160   VGA  VGA pixel clock (21.5:9 3440×1440@120) 678.100   VGA  VGA pixel clock (QHD 2560×1440@165) 1075.804   VGA  VGA pixel clock (4K UHD 3840×2160@120)
References