PC8564A-1 データシートの表示（PDF） - NXP Semiconductors.

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PC8564A-1

Real time clock and calendar

NXP Semiconductors. 

PCF8564A

Real time clock and calendar

Rev. 3 — 26 August 2013

Product data sheet

1. General description

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. The built-in word address register 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

 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

 Alarm and timer functions

 Two integrated oscillator capacitors

 Programmable clock output for peripheral devices (32.768 kHz, 1.024 kHz, 32 Hz, and

1 Hz)

 Internal Power-On Reset (POR)

 I2C slave address: read A3h, write A2h

3. Applications

 Timing devices

 Time of the day tracking

 Process timing

 Alarm

 Portable instruments

 Electronic metering

 Battery powered products

1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 20.

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