DESCRIPTION

The DS1283 Watchdog Timekeeper Chip is a self–contained real time clock, alarm, watchdog timer, and interval timer in a 28–pin JEDEC DIP or 28–pin SOIC surface mount package. The DS1283 is specifically designed to maintain internal operations from a single low voltage supply. In fact, the only two external components required by the DS1283 are a battery and crystal.

FEATURES

• Keeps track of hundredths of seconds, seconds, minutes, hours, days, date of the month, months, and years; valid leap year compersation up to 2100

• Watchdog timer restarts an out–of–control processor

• Alarm function provides notice of real time related occurrences

• Designed for battery operation

• Programmable interrupts and square wave outputs maintain 28–pin JEDEC footprint

• All registers are individually addressable via the address and data bus

• Accuracy is better than ±2 minutes/month at 25°C

• 50 bytes of user nonvolatile RAM

• Optional 28–pin SOIC surface mount package

• Low–power CMOS circuitry is maintained on less than 1 µA in standby mode

• Optional industrial temperature range –40°C to +85°C