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
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