I would suggest using capacitors separate from the resonator (i.e. a two-pin
device which is a resonator only as opposed to a three-pin device which also
contains caps internally).  I have been told by my Microchip field service
engineer to use separate caps from the resonator on the 17C44 to maintain
better control on the capacitance values.  He said sometimes the internal
cap values vary and can go outside the range required for good startup and
stability.

We have another design with a 16C57 that does use the three-pin
cap/resonator device and its works just fine.  The field service engineer
said the amplifier circuitry internally in the 17C44 is more critical of the
external capacitance values than on the 16C57.

I would say unless you have a board space problem or you are trying to shave
a few cents off the cost, you should go with the external caps.

>How do I go about connecting a *two* pin resonator to an '84? The schematics
>I've seen so far show a *three* pin device, with a pin to ground. And are
>external
>caps required?