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#

CW2188263
Category

Real Time Clock IC
Package

EDIP-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#	CW2188263
Category	Real Time Clock IC
Documentation	Datasheet
Mounting Style	Through Hole
Number of Pins	24 Pin
Case/Package	EDIP-24
Supply Voltage (DC)	4.50V (max)
Operating Voltage	4.5V ~ 5.5V
Number of Outputs	8 Output
Supply Current	15 mA
Number of Positions	24 Position
Clock Speed	32.768 kHz
Memory Size	114 B
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	0 ℃
Supply Voltage	4.5V ~ 5.5V
Supply Voltage (Max)	5.5 V
Supply Voltage (Min)	4.5 V
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Size-Length	34.04 mm
Size-Width	18.29 mm
Size-Height	9.4 mm
Operating Temperature	0℃ ~ 70℃
Product Lifecycle Status	Unknown
Packaging	Each
RoHS	RoHS Compliant
Lead-Free Status	Lead Free

Product Description

The DS12887A+ is a Real-time Clock is 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 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.
Drop-in replacement for IBM AT computer clock/calendar
Binary or BCD time representation
Selectable Intel or Motorola bus timing
Interfaced with software as 128 RAM locations
14 Bytes of clock and control registers
Interrupt output with three independently maskable interrupt flags
Time-of-day alarm once per second to once per day
Periodic rates from 122µs to 500ms
End-of-clock update cycle flag
Programmable square-wave output
Automatic power-fail detect and switch circuitry

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