Datasheet

1. General description
The PCF8563 is a CMOS
1
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
I
2
C-bus. Maximum bus speed is 400 kbit/s. The register address is incremented
automatically after each written or read data byte.
2. Features and benefits
 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 Aat V
DD
= 3.0 V and T
amb
=25C
 400 kHz two-wire I
2
C-bus interface (at V
DD
= 1.8 V to 5.5 V)
 Programmable clock output for peripheral devices (32.768 kHz, 1.024 kHz, 32 Hz, and
1Hz)
 Alarm and timer functions
 Integrated oscillator capacitor
 Internal Power-On Reset (POR)
 I
2
C-bus slave address: read A3h and write A2h
 Open-drain interrupt pin
3. Applications
 Mobile telephones
 Portable instruments
 Electronic metering
 Battery powered products
PCF8563
Real-time clock/calendar
Rev. 10 — 3 April 2012 Product data sheet
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 18.