Chuck Guzis wrote:
If it's a 3.3v microcontroller on the other side,
it's a good reason
for selecting one with 5V tolerant inputs, I guess.
Sadly those seem to be going away. A lot of the new stuff is not 5V
tolerant.
Some of the Xilinx FPGAs (e.g., Virtex-6) aren't even 3.3V tolerant!