> > So in the end bypass caps stabilize your power supply to your chips
>reducing
> > the amount of noise on those power supply lines.
> >
> > Sprinkle liberally.
>
>What value cap would you use?
>--
>D. Jay Newman           !

While .1 uF seems to be most common, values around that are quite
acceptable.  Sometimes you'll see the cost of a .1 uF a bit higher
than surrounding values; supply and demand.  Sometimes it's cheaper.
It seems to be kind of random.

Depending on the application, for a PIC I frequently use a .1 uF
X7R or X5R ceramic, and if I think the power rail is liable to dip
at all I'll stick a 2.2 uF tantalum on there as well.  Ceramic caps
provide good high frequency bypassing, while tantalum caps
have a fairly low ESR and high values in relatively smaller packages.

Mike H.

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