Intersil ISL12022IBZ

Description
The ISL12022 is a low-power real-time clock (RTC) with an embedded temperature sensor for oscillator compensation. It features a clock/calendar, power fail and low battery monitors, a brownout indicator, single periodic or polled alarms, intelligent battery-backup switching, a 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: ±5ppm over -40°C to 85°C
10-bit digital temperature sensor output: ±2°C accuracy
Customer-programmable daylight 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