PCF8563 Datasheet, PDF (1/30 Pages) NXP Semiconductors – Real-time clock/calendar

PCF8563
Real-time clock/calendar
16 April 1999
Product specification
1. 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.
2. Features
s Provides year, month, day, weekday, hours, minutes and seconds based on
32.768 kHz quartz crystal
s Century flag
s Wide operating supply voltage range: 1.0 to 5.5 V
s Low back-up current; typical 0.25 µA at V_DD = 3.0 V and T_amb = 25 °C
s 400 kHz two-wire I²C-bus interface (at V_DD = 1.8 to 5.5 V)
s Programmable clock output for peripheral devices: 32.768 kHz, 1024 Hz,
32 Hz and 1 Hz
s Alarm and timer functions
s Voltage-low detector
s Integrated oscillator capacitor
s Internal power-on reset
s I²C-bus slave address: read A3H; write A2H
s Open drain interrupt pin.
3. Applications
s Mobile telephones
s Portable instruments
s Fax machines
s Battery powered products.