This document describes the features and functions of M41T62, M41T63, M41T64, and M41T65 serial real-time clock (RTC) products, including 400 kHz I2C serial interface, memory mapped registers, timekeeping current, operating voltage range, low-power mode, programmable square wave output, and programmable alarm.
The document describes the M41T6x family of low-power serial real-time clocks (RTCs) featuring a built-in 32.768 kHz oscillator and an I2C interface. These devices include memory-mapped registers for timekeeping, alarm functions, and optional features like programmable square wave output and watchdog timers.
| Operating voltage range | 1.3 V to 4.4 V |
|---|---|
| Timekeeping current at 3 V | 350 nA |
| Operating temperature range | -40 to +85 °C |
| Clock frequency | 32.768 kHz |
The devices operate with an I2C bus voltage ranging from 1.3 V to 4.4 V.
The M41T62 requires an external crystal, while the M41T62 LCC package includes an embedded crystal requiring no external components.