PCF85163 - NXP

PCF85163 Real-time clock and calendar

The PCF85163 is a CMOS1 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 I2C-bus. Maximum bus speed is 400 kbit/s. The register address is incremented automatically afte.

Features

„ Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal „ Century flag „ Clock operating voltage: 1.8 V to 5.5 V „ Low backup current; typical 0.25 μA at VDD = 3.0 V and Tamb = 25 °C „ 400 kHz two-line I2C-bus interface (at VDD = 1.8 V to 5.5 V) „ Programmable clock output for peripheral devices (32.768 kHz, 1.024 kHz, 32 Hz, and 1 Hz) „ Alarm and timer functions „ Internal Power-On Reset (POR) „ I2C-bus slave address: read A3h and write A2h „ Open-drain interrupt pin 3. Applications „ Mobile telephones „ Portable instruments „ Electronic metering.