"I2C bus interface RTC moduleOverviewThis module is an I2C bus interface-compliant real-time clock which includes a 32.768 kHz DTCXO.
In addition to providing a calendar (year, month, date, day, hour, minute, second) function + a clock counter function, it provides an abundance of other functions including an alarm function, Wakeup timer function, time update interrupt function + 32.768 kHz output function.
Thanks to the battery backup switchover function + the interface power supply input pin, RX8900 can support various power supply circuitries.
C-MOS process for low current consumption, which enables long-term battery back-up.
Features:Features built-in 32.768 kHz DTCXO, high levels of stability.
Supports I2C bus's high-speed mode (up to 400 kHz)Alarm interrupt function for day, date, hour, + minute settingsWakeup timer interruptionTime update interrupt function (sec, min)Temperature compensated 32.768 kHz output with OE functionLeap year auto-correctionInterface range: 2.5 V - 5.5 VTime-keeping range: 1.6 V - 5.5 VLow current consumption: 0.70µA/3 V (Typ.
)Built-in backup switchover circuit (trickle charge)"