Hi Scott, A typical proccessor crystal will have 20 to 50pF of load capacitance. If there is a capacitor from each uP pin to ground, these are assumed to be in series to give the load capacitance value. Any crystal that you can get will probably work. If you have a problem with it not starting, it may be the load caps. Let me know the required load on the new crystal, and I'll send some capacitors over (assuming you are OK with SMT soldering). The 50ppm number is the "make accuracy" of the crystal in part per million, for our purposes 50ppm will be fine. From your comments it is a surface mount PCB, so probably no markings on the capacitors :o(. Have a look at Digikey and Newark, to see if they do the frequency, I know they do lots in the HC49 smt package. Best of luck Cheers Paul --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com
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Re: Dead Crystal - Replacement?
2014-06-04 by Paul