 Infineon Technologies (then Siemens) licensed MIFARE Classic from Mikron in 1994 and developed both stand alone and integrated designs with MIFARE product functions.Infineon currently produces various derivatives based on MIFARE Classic including 1K memory (SLE66R35) and various microcontrollers (8 bit (SLE66 series), 16 bit (SLE7x series), and 32 bit (SLE97 series) with MIFARE implementations, including devices for use in USIM with Near Field Communication.Motorola tried to develop MIFARE product-like chips for wired-logic version but finally gave up.