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/