NB6LQ572 2.5V / 3.3V Differential 4:1 Mux w/Input .
NB6LQ572 - 2.5V / 3.3V Differential 4:1 Mux w/Input Equalizer to 1:2 LVPECL Clock/Data Fanout / Translator
NB6LQ572M - 2.5V / 3.3V Differential 4:1 Mux w/Input Equalizer to 1:2 CML Clock/Data Fanout / Translator