Product Summary

The DS1286+ Watchdog Timekeeper is a self-contained real time clock, alarm, watchdog timer, and interval timer in a 28-pin JEDEC DIP package. The DS1286+ contains an embedded lithium energy source and a quartz crystal which eliminates the need for any external circuitry. The DS1286+ information includes hundredths of seconds, seconds, minutes, hours, day, date, month, and year.

Parametrics

DS1286+ absolute maximum ratings: (1) Voltage on Any Pin Relative to Ground: -0.3 to +7.0V; (2) Operating Temperature: 0°C to 70°C; (3) -40°C to +70°C; 4) Soldering Temperature: 260°C for 10 seconds.

Features

DS1286+ features: (1) Keeps track of hundredths of seconds, seconds, minutes, hours, days, date of the month, months, and years; valid leap year compensation up to 2100; (2) Watchdog timer restarts an out-of-control processor; (3) Alarm function schedules real time-related activities; (4) Embedded lithium energy cell maintains time, watchdog, user RAM, and alarm information Programmable interrupts and square wave outputs maintain 28-pin JEDEC footprint; (5) All registers are individually addressable via the address and data bus; (6) Accuracy is better than +/- 1 minute/month at 25°C; (7) Greater than 10 years of timekeeping in the absence of VCC; (8) 50 bytes of user NV RAM.

Diagrams

DS1286+ Pin Assignment

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