Difference between LVPECL and PECL
I suspect this question is related to your previous one.

The part you are using, the Si530 programmable crystal oscillator, is avaialble in several variants. Depending on the part number you order, you could have an output with 3.3 V LVPECL outputs, 2.5 V LVPECL outputs, or another standard. 

ECL logic was initially specified for systems with -5 V supplies. Later, it was remembered that voltages are all relative, and these parts could be used nearly as well in systems with +5 V supplies, and these systems were called PECL systems.

When ECL parts operating on 3.3 V were developed, these were called LVECL or LVPECL parts. Still later, parts were developed to operate from 2.5 V supplies, and these are also generically called LVPECL parts, making the term LVPECL somewhat ambiguous. Furthermore, just plain "ECL" and "PECL" continue to be used as a catch-all term for all parts (5 V, 3.3 V, and 2.5 V) that have a similar differential open-emitter output structure, so saying something is "PECL" doesn't mean it isn't LVPECL.

In my comment, I referred to "3.3 V PECL" to specify this particular voltage level, instead of just "LVPECL" which would not have specified whether the 3.3-V or 2.5-V variant was meant. 3.3 V PECL and 3.3 V LVPECL are two words for the same thing. 

Since your oscillator has 3.3-V (LV)PECL output, and the chip you want to use it with (MC100EP016A) has 3.3-V (LV)PECL inputs, you do not need any translator for your situation.

If you did in fact want to connect a 3.3-V (LV)PECL clock signal to a 5-V PECL receiver, you could also do that using AC coupling, and still not require any translator chip. On Semi App Note AN8040 gives a run-down of several ECL termination techniques. You want to connect the receiver as shown in section 6, but remember that the driver also needs some pull-down resistance (~100-200 ohms) which isn't shown in the diagrams in the app note.