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DS12885

Maxim Integrated Products
Part Number DS12885
Manufacturer Maxim Integrated Products
Description Real Time Clock
Published Mar 7, 2006
Detailed Description Rev 0; 6/05 Real-Time Clock General Description The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed...
Datasheet PDF File DS12885 PDF File

DS12885
DS12885

Overview
Rev 0; 6/05 Real-Time Clock General Description The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287.
The devices provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 114 bytes of batterybacked static RAM (113 bytes in the DS12C887 and DS12C887A).
The DS12887 integrates a quartz crystal and lithium energy source into a 24-pin encapsulated DIP package.
The DS12C887 adds a century byte at address 32h.
For all devices, the date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years.
The devices also operate in either 24-hour or 12-hour format with an AM/PM indicator.
A precision temperature-compensated circuit monitors the status of VCC.
If a primary power failure is detected, the device automatically switches to a backup supply.
A lithium coin-cell battery ...


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