PCF8563 300 mW Electronic IC Chips timer ic Real - time clock / calendar

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PCF8563 Real-time clock/calendar

General 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 I²C-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 on 32.768 kHz quartz crystal

■ Century flag

■ Wide operating supply voltage range: 1.0 to 5.5 V

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

■ 400 kHz two-wire I²C-bus interface (at VDD = 1.8 to 5.5 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 ²C-bus slave address: read A3H; write A2H

■ Open drain interrupt pin.

Applications

■ Mobile telephones

■ Portable instruments

■ Fax machines

■ Battery powered products.

Quick reference data

Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Block diagram

Pin configuration

Device diode protection diagram