> Hi folks , Does anybody knows which chips is this ? Tks. Made by GTE, and I would guess the part number is 5380 (I have a feeling se= veral manufacturers made that part number) and I would suspect the Sxxxx is= the mask number for the code that is in it.=20 The 8325 on the bottom line will be the date code (25th week of 1985, which= would be about right for that chip I would guess), and all the lines in th= e middle are probably the in-house part number for the company who ordered = it. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .