Up until now, I've really only played around with a 16F87x using a 4-MHz
crystal and 2 22 pF ceramic disc caps...

Osc1      Osc2
|         |    Please excuse the
|         |    crudeness of this
|---|0|---|    diagram, but I
|         |    don't have time
=== 22pF  ===   to make it to
|         |    scale...
|         |
|_________|
      |
     Gnd

I buy el cheapo XTAL's from Digikey, 4 MHz 20 pF Cload.  I'd like to go to
20 MHz crystals for some 16F87x projects, and the 16C7x5 USB jobs need a 6
or 24 MHz, and the 18F45x can handle up to a 40 MHz.  Can I basically just
swap out the 4 MHz with the other part, even if the other part is a Series
capacitance crystal?  Or do I need to modify it somehow?  Accuracy is
important to me, but not critical...100 ppm or so is acceptable.  Thanks!

Mike Hord


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