DESCRIPTION

The PCF8563 is a CMOS real-time clock/calendar optimized for low power consumption. A programmable clock output, interrupt output and voltage-low detector are also provided. All address and data are transferred serially via a two-line bidirectional I 2 C-bus. Maximum bus speed is 400 kbits/s. The built-in word address register is incremented automatically after each written or read data byte.

FEATURES

● Provides year, month, day, weekday, hours, minutes and seconds based on32.768 kHz quartz crystal

● Century flag

● Wide operating supply voltage range: 1.0 to 5.0 V

● Low back-up current; typical 0.25 µA at V D D = 3.0 V and Tamb = 25 °C

● 400 kHz two-wire I 2 C-bus interface (at V D D = 1.8 to 5.0 V)

● Programmable clock output for peripheral devices: 32.768 kHz, 1024 Hz, 32 Hz and 1 Hz

● Alarm and timer functions

● Voltage-low detector

● Integrated oscillator capacitor

● Internal power-on reset

● I 2 C-bus slave address: read A3H; write A2H

● Open drain interrupt pin.