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.

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

Applications

■ Timing devices

◆ Time of the day tracking

◆ Process timing

◆ Alarm

■ Portable instruments

■ Electronic metering

■ Battery powered products

PCF8564AU/5BD/1属于集成电路（IC） > 实时时钟。恩智浦半导体公司制造生产的PCF8564AU/5BD/1实时时钟实时时钟 (RTC) 为几乎所有需要保持精确时间的电子设备提供时间和/或日期信息。时钟类型有二进制计数器、时钟/日历/监控器、历时计时器、幻时钟芯片、便携式系统控制器、温度记录器、时间事件记录器和计时器时钟外设。其包含 2 B 至 2 MB 不等的存储器，接口选项有 I2C、并行、串行、SPI、1 线式、2 线式、3 线式和 4 线式。