DATASHEET
ISL12022 FN6659
Rev 3.00
Nov 22, 2011 Low Power RTC with Battery-Backed SRAM and Embedded Temp Compensation
В±5ppm with Auto Daylight Saving Features 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 Resealв„ў function and
128 bytes of battery-backed user SRAM. 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
-В±5ppm Over -40В°C to +85В°C The oscillator uses an external, low-cost 32.768kHz crystal.
The real time clock tracks time with separate registers for
hours, minutes, and seconds. The device has calendar
registers for date, month, year and day of the week. The
calendar is accurate through 2099, with automatic leap year
correction. 10-bit Digital Temperature Sensor Output
-В±2В°C Accuracy Customer Programmable Day Light Saving Time Daylight Savings time adjustment is done automatically, using
parameters entered by the user. Power fail and battery
monitors offer user-selectable trip levels. A time stamp
function records the time and date of switchover from VDD to …