I have successfully overclocked a 20Mhz 16C73 to 57Mhz.  It could
possibly run faster, but that was the fastest can oscillator I could find
at the time.  VCC was 5.01 V and the chip ran cool.

My guess is that if you always ran the chips at near the high end of the
VCC range (5 V and above) you could get them to run at least double
their rated speed.


----- Original Message -----
From: Wagner Lipnharski <wagner@USTR.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Thursday, November 25, 1999 7:12 AM
Subject: Re: overclocking a PIC


> Peter Forde wrote:
> >
> >   As a matter of curiosity, how fast can you overclock a PIC with
> > injecting an external clock signal?
> >
> >   I'm experimenting with PIC16F877-04/P, and been injecting into CLKIN
> > from an EXO 16MHz clock generator.  Usually use the 4 MHz divided output
> > from this but sometimes I select the 16 MHz output, when the PIC still
> > seems to work perfectly well.  Doesn't get warm or anything.
>