This part comes in flavors - Digikey's description table is here... http://tinyurl.com/o86d8ro Under "Descriptions" distinctions such as as "SER", "SRL", & "UNIPOL" are noted. The data sheet is not forthcoming about what this means, and Google does'nt seem to know either. Could someone explain, or point me at an explanation? Thanks. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .