Epson X1B000481000411, Real Time Clock Serial-I2C, 10-Pin 3.2x2.5 Ceramic Package

The Epson Real Time Clock Module has a I2C Bus interface with a fast mode of 400 kHz. It has a backup power supply switching function in which the voltages are monitored to switch between normal mode and backup mode. It has self-monitoring interruption as Crystal oscillation stop.

Current consumption is 240 nA per 3V
Time stamp function
Interrupt output
Auto repeat wakeup timer interruption