AB-RTC-XL-32.768KHZ-2-T1
Overview
The AB-RTC-XL-32.768KHZ-2-T1 is an ultra-low power Real-Time Clock (RTC) module that integrates a CMOS oscillator and a 32.768 kHz crystal into a single 1.5 x 3.2 mm package. It is designed for extreme power efficiency, featuring a typical timekeeping current of just 190nA and an operating voltage range that extends down to 0.9V. This I2C-compatible device provides full calendar and alarm functions while simplifying PCB design by eliminating the need for external crystal matching.
Why Choose This Part
This module combines high accuracy and low power by integrating the crystal and oscillator, which avoids common tuning issues and parasitic capacitance problems. Its ability to operate across a wide voltage range from 0.9V to 5.5V makes it versatile for different battery chemistries, and the programmable offset register allows for precise frequency adjustment.
Applications
Key Specifications
Getting Started
Communicate with the device via the I2C interface at a standard address to access the clock and calendar registers. Ensure that the internal Power-On Reset (POR) is accounted for during startup and use the alarm interrupt pins to wake a host microcontroller from deep sleep. For prototyping, use a DFN-8 to DIP adapter or include a 0.1uF bypass capacitor close to the VDD pin on your PCB layout.
