Use, I believe it was from 2 hp printers. The underside of the Motorola is blank, however the TI chip has 35Exx where xx appears to be a 2 digit seria= l number I've got 9,10,11,33,35,36,58,59, etc. I don't believe its helpful in my situation but thanks for the tip anyways. On Wed, May 11, 2011 at 4:40 AM, wrote: > > Recently I desoldered several old PCB's I got around 25 mysterious chip= s > > that seem to be manufactured by Texas Instruments. They are labeled > 81C285T > > on what (usually) is the part number line and 210895 on the date line > > (August, 21, 1995) in a 16 SOIC package. I also got what i apparently a > pin > > for pin compatible chip marked as INB627, 1821-0895, by Motorola? from = an > > identical PCB from another [same model] board. > > > > I cannot find a datasheet for either of these chips (yes, google has > failed > > me) and it would be greatly appreciated if someone could send me a link > to > > it > > Are these PCBs from an HP manufactured product? The 1821-0895 number look= s > like an HP in-house part number. > > One trick that may be worth trying is to look on the underside of the > chips, there may be a generic part number there, I had this happen with a= n > HP plotter that I acquired. The company had two of them, one faulty, one > working, and by swapping the pluggable chips between them identified the > faulty item. HP wouldn't supply a chip, so I said my bench could be a tra= sh > can for it. On looking at the underside of the chip I found '6802', and t= he > chip was a Motorola one, so replacing it with a 6802 from another piece o= f > equipment got me a working plotter for nothing. > -- > Scanned by iCritical. > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .