ISL1218 Description
ISL1218 Low Power RTC with Battery Backed SRAM The ISL1218 device is a low power real time clock with timing and crystal pensation, clock/calendar, power fail indicator, periodic or polled alarm, intelligent battery backup switching and battery-backed user SRAM. The oscillator uses an external, low-cost 32.768kHz crystal. The real time clock tracks time with separate registers for hours, minutes, and seconds.