At 10:23 PM 2/6/2014, you wrote:
>Anything to watch out for when using these, design considerations,
>capacitor values (currently 22pF)...?

Load caps should be correct for the xtal. They're calculated the same way
as for any crystal.

The biggest difference with the tiniest crystals is that they have very low
power handling capability- maybe 100uW max. vs. 1 mW max for HC-49 crystals
(see the data sheet).

Exceed the max numbers and you get excessive aging or even failure.

It's difficult to get any kind of guarantee on this, but you can measure
the crystal current and calculate the max power (I^2*R), where R is the max
ESR (see the data sheet- varies with crystal frequency). The tiny crystals
tend to have significantly worse ESR than larger ones.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the rewar=
d"
speff@interlog.com             Info for manufacturers: http://www.trexon.co=
m
Embedded software/hardware/analog  Info for designers:  http://www.speff.co=
m



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