PCF85053A Datasheet - NXP

PCF85053A Bootable CPU RTC

The PCF85053A is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption and automatic switching to battery on primary power loss. Featuring clock output, ALRT (interrupt) output and 128 bytes of battery backup SRAM. The PCF85053A includes two I2C buses. The primary I2C bus has.

PCF85053A Features

* Voltage range addresses common supply rails

* VDD supply voltage from 1.7 V to 3.6 V

* VBAT battery supply voltage from 1.55 V to 3.6 V

* Two independent I2C interfaces with up to 400 kHz speed

* Primary I2C bus with Read/write capability on RTC and SRAM reg

PCF85053A-NXP.pdf