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DS1287A Datasheet Real Time Clock

Manufacturer: Dallas Semiconductor

Overview: DS1287A DS1287A Real Time Clock.

Datasheet Details

Part number DS1287A
Manufacturer Dallas Semiconductor
File Size 47.42 KB
Description Real Time Clock
Datasheet DS1287A_DallasSemiconductor.pdf

General Description

AD0–AD7 NC MOT CS AS R/W DS RESET IRQ drain) SQW VCC GND RCLR Multiplexed address/data bus No connection Bus type selection Chip select Address strobe Read/write input Data strobe Reset input Interrupt request output (open Square wave output +5 volt supply Ground RAM clear • Programmable square wave output signal • Bus-compatible interrupt signals (IRQ) • Three interrupts are separately software-maskable and testable – Time-of-day alarm once/second to once/day – Periodic rates from 122 ms to 500 ms – End of clock update cycle DESCRIPTION The DS1287A is identical to the DS1287 with the addition of the RAM clear pin.

For a complete description of operating conditions, electrical and mechanical characteristics, bus timing, and pin descriptions see the DS12887A data sheet.

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Key Features

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