> Read the data sheet.
> The maximum voltage for the open drain output is well specified.
Olin, can you name the exact datasheet and page you are referring to? Maybe
16F84A?

I once got an answer to this question
from a uChip guy who said that on a (nowadays extinct) 16c84 14V was fine.

Wouter van Ooijen

Van Ooijen Technische Informatica: http://www.voti.nl
Jal compiler for PIC uC's:  http://www.xs4all.nl/~wf/wouter/pic/jal

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