Implementing Flawless Designs with Accurate I²C Real-Time Clocks

Abstract: This application note presents an overview of the operational characteristics of accurate I²C real-time clocks (RTCs), including the DS3231, DS3231M, and DS3232. It focuses on general application guidelines that facilitate use of device resources for power management, I²C communication circuit configurations, and I²C characteristics relative to device power-up sequences and initializations. Additional discussions on decoupling are provided to support developing strategies for mitigating power-supply pushing of device frequency.