DS1283

DS1283 DS1283 Watchdog Timekeeper Chip FEATURES PIN ASSIGNMENT INTA X1 X2 NC A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 V CC WE INTB(INTB) V BAT 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 RCLR SQW OE INTP CE DQ7 DQ6 DQ5 DQ4 DQ3 Designed for battery operation www.DataSheet4U.com Programmable interrupts and square wave outputs maintain 28–pin JEDEC footprint dress and data bus All registers are individually addressable via the ad 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 DS1283 28–PIN DIP (600 MIL) INTA X1 X2 NC A5 1 2 3 28 27 26 25 24 23 22 21 20 19 18 17 16 15 V CC WE INTB(INTB) VBAT RCLR SQW OE INTP CE DQ7 DQ6 DQ5 DQ4 DQ3 Optional industrial temperature range –40°C to +85°C 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 b...