Renesas Electronics ISL1208IB8Z-TK, Real Time Clock, 8-Pin SOIC

The Renesas Electronics is real time clock/calendar, low power RTC with battery backed SRAM.there is timing and crystal compensation, power fail indicator, periodic or polled alarm, intelligent battery backup switching

Single event or pulse interrupt mode
Power failure detection
On-chip oscillator compensation
2 Bytes Battery-Backed User SRAM
I2C interface
400kHz data transfer rate
400nA battery supply current