> > I'd like to convert the output of a 12V 4000 Series CMOS IC to the
> > digital input of my PIC16C76 which is running at 5V.

>         In my mind that would actually be the easier of the two cases
(only
> marginally). I'd recommend a single transistor, either BJT or FET, doesn't
> really matter. TTYL

For a single input a transistor or FET is about as easy as you are going to
get. (Two resistors or a resistor and zener are arguably simpler but have
secondary complications).

If you wanted absolute minimum parts count then a FET with a suitably rated
gate threshold would allow use of a single FET and nothing else. Pullup
provided by PIC. Many FETS will be suitable for this task as 12v falls
happily in their on gate voltage range.



        RM
.

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