DATASHEET
ISL1220 FN6315
Rev 1.00
August 7, 2015 Low Power RTC with 8 Bytes of Battery Backed SRAM and Separate FOUT
The ISL1220 device is a low power real time clock with
timing and crystal compensation, clock/calendar, power fail
indicator, periodic or polled alarm, intelligent battery backup
switching, battery-backed user SRAM and separate FOUT
and IRQ outputs.
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. Ordering Information
PART
NUMBER
(Note) PART
MARKING ISL1220IUZ-T 1220Z VDD
RANGE Features Real Time Clock/Calendar
-Tracks Time in Hours, Minutes, and Seconds
-Day of the Week, Day, Month, and Year Frequency Output pin
-15 Selectable Output Frequencies Single Alarm with Separate Interrupt pin …