name: 54ALS317 function: 256-RAM, 64x4, open-collect package: DIP,20 manufacturer: TI added-by: Long John Silicon +--()--+ A0 | 1 20| VCC A1 | 2 19| D3 A2 | 3 18| Q3 A3 | 4 17| D2 A4 | 5 16| Q2 A5 | 6 15| D1 R/W! | 7 14| Q1 S1! | 8 13| D0 S2! | 9 12| Q0 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/