PCF8564A Datasheet (NXP Semiconductors) - Real-time Clock/Calendar

PCF8564A, Real-time Clock/Calendar

The PCF8564A is a CMOS1 real-time clock 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 the two-line bidirectional I2C-bus.

Maximum bus speed is 400 kbit/s.

PCF8564A Features

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

* Wide clock operating voltage: 1.0 V to 5.5 V

* Low back-up current typical 250 nA at 3.0 V and 25 C

* 400 kHz two-wire I2C interface (1.8 V to 5.5 V)

* Low-voltage detector