name: X28HC64 function: 5 volt byte alterable E2PROM package: PLASTIC DIP,28 manufacturer: XICOR added-by: SPAMDOGG +--()--+ NC | 1 28| Vcc A12 | 2 27| WE- A7 | 3 26| NC A6 | 4 25| A8 A5 | 5 24| A9 A4 | 6 23| A11 A3 | 7 22| OE- A2 | 8 21| A10 A1 | 9 20| CE- A0 |10 19| I/O7 I/O0 |11 18| I/O6 I/O1 |12 17| I/O5 I/O2 |13 16| I/O4 Vss |14 15| I/O3 +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/