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 Temperature 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
• 1µA Typical Battery Current
• Pb-Free (RoHS Compliant)

APPLICATIONs
• Utility Meters
• POS Equipment
• Medical Devices
• Security Systems
• Vending Machines
• White Goods
• Printers and Copiers