ISL1220IUZ Datasheet PDF - Intersil

●The ISL1220IUZ 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, 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.

● Real time clock/calendar

● 15 Selectable frequency outputs

● Single alarm with separate interrupt pin

● Automatic backup to battery or super capacitor

● Power failure detection

● On-chip oscillator compensation

● 8-byte Battery-backed user SRAM

● 400nA Battery supply current