PCF85263ATT/AJ
Overview
The PCF85263ATT/AJ is an ultra-low power CMOS Real-Time Clock and calendar optimized for highly integrated battery-backed applications. It features a versatile battery management circuit that handles automatic switching between main and backup power, along with a programmable offset register for fine-tuning clock frequency accuracy.
Why Choose This Part
This RTC offers exceptional flexibility with two independent interrupt generators and a built-in watchdog timer, reducing the need for external supervisory ICs. Its wide operating voltage range from 0.9V to 5.5V ensures functionality across various power rail configurations, while the automatic battery switchover simplifies robust power path design.
Applications
Key Specifications
Getting Started
To begin development, interface the PCF85263 via the I2C bus and ensure the 32.768 kHz crystal is placed close to the pins to minimize parasitic capacitance. Use the programmable offset register to calibrate for crystal frequency deviations caused by temperature or manufacturing tolerances.
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