描述 Description

The PCF8564A is a CMOS 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 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.

特性 Features

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 ℃
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
Target ApplicationsTiming devicesTime of the day tracking
Process timing
Alarm
Portable instruments
Electronic metering
Battery powered products

應(yīng)用 Application

Timing devicesTime of the day tracking
Process timing
Alarm

Portable instruments
Electronic metering
Battery powered products