Description
Rev 0; 6/05 Real-Time Clock General .
The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287.
Features
* Drop-In Replacement for IBM AT Computer Clock/Calendar
* RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Through 2099
* Binary or BCD Time Representation
* 12-Hour or 24-Hour Clock with AM and PM in 12-Hour Mode
* D
Applications
* Embedded Systems Utility Meters Security Systems Network Hubs, Bridges, and Routers
Typical Operating Circuit
CRYSTAL VCC
DS83C520
w
w
X1 AS R/W DS CS AD(0
* 7) IRQ MOT
. D w
X2 VCC RESET RCLR
t a
S a
e h
t e
U 4
. c
m o
DS12885
SQW VBAT
* Optional Industrial Temperature Ra
