name: DS12B887 function: Real Time Clock package: DIP,24 manufacturer: Dallas Semiconducor added-by: Ron Coble +--()--+ NC | 1 24| Vcc NC | 2 23| SQW NC | 3 22| NC AD0 | 4 21| RCLR AD1 | 5 20| NC AD2 | 6 19| IRQ AD3 | 7 18| NC AD4 | 8 17| DS AD5 | 9 16| NC AD6 |10 15| R/W AD7 |11 14| AS GND |12 13| CS +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/