Hello,
I am confused about the maximum "I/O voltage tolerance" rating of this part. It appears that the forward voltage drop of the internal diodes is around 0.7 V (from my breadboarding tests), while the absolute maximum voltage the datasheet suggests to put on the I/O pins is Vcc+0.3 V. This is not enough to make the diodes conduct. Is this suggesting that short voltage spikes are acceptable, while constant overvoltage past Vcc+0.3 V is not recommended?
Thank you,
Sam