name: 54ALS318 function: 256-RAM, 32x8, open-collect package: DIP,20 manufacturer: TI added-by: Long John Silicon +--()--+ A0 | 1 20| VCC A1 | 2 19| D7 A2 | 3 18| D6 A3 | 4 17| D5 A4 | 5 16| D4 NC | 6 15| D3 R/W! | 7 14| D2 S1! | 8 13| D1 S2! | 9 12| D0 GND |10 11| NC +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/