DS12887A - Maxim Integrated

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

DS12887A
Manufacturer

Maxim Integrated
ChipWorker Part#

CW48799533
Category

Real Time Clock IC
Package

DIP-24
Description

Real Time Clock Multiplexed 114Byte Clock/Calendar/Alarm 24Pin EDIP
Documentation

Datasheet

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DS12887A Specifications

Attribute	Attribute Value

Part Number	DS12887A
Manufacturer	Maxim Integrated
ChipWorker Part#	CW48799533
Category	Real Time Clock IC
Documentation	Datasheet
Mounting Style	Through Hole
Number of Pins	24 Pin
Case/Package	DIP-24
Supply Voltage (DC)	4.50V (max)
Number of Outputs	8 Output
Clock Speed	32.8 kHz
Memory Size	114 B
Supply Voltage	4.5V ~ 5.5V
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Operating Temperature	0℃ ~ 70℃
Product Lifecycle Status	Unknown
Packaging	Tube
RoHS	Non-Compliant
Lead-Free Status	Contains Lead

Product Description

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 battery-backed 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 can be connected to the VBAT input pin on the DS12885 to maintain time and date operation when primary power is absent. The device is accessed through a multiplexed byte-wide interface, which supports both Intel and Motorola modes.

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