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PCF8564AU-5BB-1

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PCF8564AU-5BB-1 数据手册

PCF8564A

Real time clock and calendar

Rev. 02 — 30 September 2010

Product data sheet

1. General description

The PCF8564A is a CMOS¹real-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 a 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

Century flag

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

Mobile telephones

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.

12 3 4 5 6 7...45

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