The Renesas low power RTC 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 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. 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.

15 selectable frequency outputs
Automatic backup to battery or super capacitor
On-Chip oscillator compensation
2 bytes battery-backed user SRAM
I2C interface
400kHz data transfer rate
Pb-free available (RoHS compliant)