Hi:
I need to select a buffer for a 3.3V logic sigal from CPLD. The signal is a few MHz can have to travel 3 feet long of PCB track.
If the pcb track impedance is 75Ohm, and I use 75Ohm parallel termination. Then the current consumption is 3.3V/75Ohm=44mA. But the SN74LVC1G17 output is 24mA.
I can not find another proper logic buffer for this case. Is there a dedicated buffer for driving tranmission line or coaxial cable with parallel termination?
Thank you!