name: 27C040 function: 512kx8 CMOS EPROM package: 32-pin Ceramic DIL,32 manufacturer: AMD added-by: Vince Sutton +--()--+ Vpp | 1 32| Vcc A16 | 2 31| A18 A15 | 3 30| A17 A12 | 4 29| A14 A7 | 5 28| A13 A6 | 6 27| A8 A5 | 7 26| A9 A4 | 8 25| A11 A3 | 9 24| /OE (/G) A2 |10 23| A10 A1 |11 22| /CE - /PGM (/P) A0 |12 21| DQ7 DQ0 |13 20| DQ6 DQ1 |14 19| DQ5 DQ2 |15 18| DQ4 Vss |16 17| DQ3 +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/