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

The ISL12023 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

• Clock Output with 15 Selectable Frequencies

• 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

• Separate FOUT, IRQ, and LVRST Outputs

• I2C Bus™

- 400kHz Clock Frequency

• 14 Ld TSSOP Package

• Pb-Free (RoHS Compliant)