> >When purchasing a crystal, how do I tell the diff between series-cut
> >and parallel-cut?  The 16F872 datasheet specifies parallel req'd, as
> >series may give a diff freq.
> >
>
> Check the catalog listings.  Digikey and Mouser both specify
> a load capacitance or list them as 'series' for each crystal type.
>
> If they list a load capacitance (typically around 20pF),
> they're parallel crystals. If they say 'series', they're series. :=)

I've wondered about this too, the only descriptions I've been able to
get were physics of crystals and other such nonsense! :)

Not what they are, but how to use them.

The parallel crystals specify the load capacitance, and I've used those
and they work great.

So how do you use the series?  With the same capacitors?  What rating?
I've seen "series" crystal circuits with several buffers and stuff, way
too much to be practical.

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