ISL1221 Datasheet (Renesas)

ISL1221, Low Power RTC

DATASHEET ISL1221 Low Power RTC with Battery Backed SRAM and Event Detection FN6316 Rev 1.00 July 15, 2010 The ISL1221 device is a low power real time clock with Event Detect and Time Stamp function, timing and crystal compensation, clock/calendar, power fail indicator, periodic or polled alarm, intelligent battery backup switching with separate FOUT output and 2 Bytes of battery-backed user SRAM.

The oscillator uses an external, low-cost 32.768kHz crystal.

The real time clock tracks time wit