name: 7483 function: 4-bit Adder package: DIP16,16 manufacturer: added-by: +--()--+ A4 | 1 16| B4 SIGMA3 | 2 15| SIGMA4 A3 | 3 14| C4 B3 | 4 13| CO Vcc | 5 12| GND SIGMA2 | 6 11| B1 B2 | 7 10| A1 A2 | 8 9| SIGMA1 +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/