That reminds me that I once had a problem with a resonator (ZTT 20.00MZ 
thru-hole 3-pin resonator) and since then I almost always put a guard ring 
around the resonator/crystal on the PCB.



On Friday 15 June 2007 12:59, Harold Hallikainen wrote:
> ... It doesn't cover every chip and does not
> consider layout issues, but it's a start.
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