Low Power RTC with Battery-Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Daylight Saving

The ISL12022 device is a low power real time clock with an embedded Temp sensor for oscillator compensation, clock/calendar, power fail, low battery monitor, brownout indicator, single periodic or polled alarms, intelligent battery-backup switching, Battery Reseal? function and 128 bytes of battery-backed user SRAM.

Features

? Real Time Clock/Calendar

- Tracks Time in Hours, Minutes and Seconds

- Day of the Week, Day, Month and Year

? On-chip Oscillator Compensation Over the Operating Temp Range

- ±5ppm Over -40°C to +85°C

? 10-bit Digital Temperature Sensor Output

- ±2°C Accuracy

? Customer Programmable Day Light Saving Time

? 15 Selectable Frequency Outputs

? 1 Alarm

- Settable to the Second, Minute, Hour, Day of the Week, Day, or Month

- Single Event or Pulse Interrupt Mode

? Battery Reseal? Function to Extend Battery Shelf Life

? Automatic Backup to Battery or Super Capacitor

- Operation to VBAT = 1.8V

- 1.0μA Battery Supply Current

? Battery Status Monitor

- 2 User Programmable Levels

- Seven Selectable Voltages for Each Level

? Power Status Brownout Monitor

- Six Selectable Trip Levels, from 2.295V to 4.675V

? Oscillator Failure Detection

? Time Stamp for First VDD to VBAT, and Last VBAT to VDD

? 128 Bytes Battery-Backed User SRAM

? I2C Bus?

- 400kHz Clock Frequency

? 8 Ld SOIC Package

? Pb-Free (RoHS Compliant)

Applications

? Utility Meters

? POS Equipment

? Medical Devices

? Security Systems

? Vending Machines

? White Goods

? Printers and Copiers