Interfacing AVRs (and Arduinos) to voltages higher than Vdd
[ad_1] What is good, is that, by design rather than luck, up to +20mA can be pushed into an HC input without triggering destructive latch-up. Tale a look at page 28 in this Philips (now Nexperia) application note. BTW, I am not sure if 20mA continuous is possible – the internal resistance might get aRead more about Interfacing AVRs (and Arduinos) to voltages higher than Vdd[…]
