re: Max voltage on any pin.

   John, I just went back through my data books and only MCLR is specified
to handle +14V. The other pins are 7.5V. When I saw that reply it set off
an `alarm' so I had to check it out. Use a transistor or MOSFET buffer for
a higher voltage load.

   - Tom

At 08:54 PM 4/16/97 -0500, you wrote:
>[re port pin RA4]
>|     Yep, that's why its open drain.  Must limit to +14V and if driving a
>|     relay, watch out for back EMF.
>
>Is the +14 limit documented anyplace?  All of the PIC books I've seen
>document the max on "any pin other than /Mclr" as Vdd.  Does Microchip
>"officially" allow RA4 higher?
>
>