name: x20c17 function: 2k*8 CMOS High Speed AUTOSTORE Nonvolatile Static RAM package: Plastic CERDIP,24 manufacturer: Xicor +--()--+ a7 | 1 24| Vcc a6 | 2 23| a8 a5 | 3 22| a9 a4 | 4 21| *we a3 | 5 20| *oe a2 | 6 19| a10 a1 | 7 18| *ce a0 | 8 17| i/o7 i/o0 | 9 16| i/o6 i/o1 |10 15| i/o5 i/o2 |11 14| i/o4 Vss |12 13| i/o3 +------+ This pinout came from the Chipdir: http://www.chipdir.org/