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DS1284 - (DS1284 / DS1286) Watchdog Timekeepers

Datasheet Summary

Description

The DS1284/DS1286 watchdog timekeepers are self-contained real-time clocks, alarms, watchdog timers, and interval timers in a 28-pin JEDEC DIP and encapsulated DIP package.

Features

  • Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years; Valid Leap Year Compensation Up to 2100 Watchdog Timer Restarts an Out-of-Control Processor Alarm Function Schedules Real-Time-Related Activities Embedded Lithium Energy Cell Maintains Time, Watchdog, User RAM, and Alarm Information Programmable Interrupts and Square-Wave Outputs Maintain JEDEC Footprint All Registers are Individually Addressable via the Address and Data Bus Accuracy is Bet.

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Datasheet preview – DS1284

Datasheet Details

Part number DS1284
Manufacturer Dallas Semiconductor
File Size 426.62 KB
Description (DS1284 / DS1286) Watchdog Timekeepers
Datasheet download datasheet DS1284 Datasheet
Additional preview pages of the DS1284 datasheet.

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Full PDF Text Transcription

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DS1284/DS1286 Watchdog Timekeepers www.maxim-ic.com GENERAL DESCRIPTION The DS1284/DS1286 watchdog timekeepers are self-contained real-time clocks, alarms, watchdog timers, and interval timers in a 28-pin JEDEC DIP and encapsulated DIP package. The DS1286 contains an embedded lithium energy source and a www.DataSheet4U.com quartz crystal, which eliminates the need for any external circuitry. The DS1284 requires an external quartz crystal and a VBAT source, which could be a lithium battery. Data contained within 64 8-bit registers can be read or written in the same manner as byte-wide static RAM. Data is maintained in the watchdog timekeeper by intelligent control circuitry that detects the status of VCC and write protects memory when VCC is out of tolerance.
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