PCF8563, PCF Datasheet - NXP

PCF8563 Real-time clock/calendar

The PCF8563 is a CMOS1 Real-Time Clock (RTC) and calendar optimized for low power consumption. A programmable clock output, interrupt output, and voltage-low detector are also provided. All addresses and data are transferred serially via a two-line bidirectional I2C-bus. Maximum bus speed is 400 kbi.

PCF8563 Features

* Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal

* Century flag

* Clock operating voltage: 1.0 V to 5.5 V at room temperature

* Low backup current; typical 0.25 A at VDD = 3.0 V and Tamb = 25 C

* 400 kHz two-wire I2C-bus int

PCF-856.pdf