MicroChip says the lowest voltage I can operate the
16C558 on is 3.0V

ISD says I have to supply 2.7 to 3.3V to the ISD chip

Anybody with a good suggestion what my actual design
goal for Vcc should be?  3.15V would split the difference
between the 3.3V upper bound and the 3.0V lower bound.
But I know that limits are what you make them. So, anybody
who'se run a PIC chip in a 3V logic family circuit who can
advise?

Also, I need to clock with a XTAL (I need the timebase),
will it work reliably at 3.0V???

Annie doesn't like running at the ragged edge of her
voltage spec.


--
Anniepoo
Need loco motors?
http://www.idiom.com/~anniepoo/depot/motors.html