PCF85053A Description
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.
PCF85053A Key Features
- Voltage range addresses mon 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 registers
- Secondary I2C bus with read/write capability on RTC and SRAM registers enabled by primary I2C
- Both I2C interface supports clock timeout of 35 ms max
- Crystal patibility & accuracy
- Quartz oscillator circuit with integrated load capacitors (no external capacitors required)
- Configurable: CL = 6 pF, CL = 7 pF, or CL = 12.5 pF