On Fri, 1 Mar 2002 13:11:07 -0600, Nick Veys wrote:

>> >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. :=3D)
>
>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.
>

Sorry, I've never dug that deep into them.


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

Me too. Come to think of it, I don't think that I've ever used a
series crystal.

>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.

Again, sorry, I'm clueless. I'm sure that somebody on the list can
help on this.


Regards, Bob

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