Olin opined: > But if you're talking about a dozen chips that were purchased all at the > same time or in a couple of lots, I wouldn't draw ***ANY*** conclusions > whatsoever from what you measure. Absolutely none. Of course, if the dozen chips are all you'll ever need for the application, and you carefully characterize those (and perhaps a few spares), then you're all set. Bob Ammerman RAm Systems -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads