M41T82RM6E

Real Time Clock Overview

The M41T82RM6E is a low-power serial I²C real-time clock (RTC) manufactured by STMicroelectronics. It features a built-in 32.768 kHz oscillator and an external crystal-controlled SO-8 package. The device includes eight bytes of register map for clock/calendar functions in BCD format, plus additional registers for alarms, watchdog, counter, and square wave outputs. It incorporates seven bytes of user SRAM and automatic leap year correction. A power sense circuit detects failures and switches to battery supply. Operating voltage ranges from 2V to 5.5V, with a maximum timing current of 10µA at 5.5V.

Real Time Clock Feature Summary

• I²C interface with automatic address increment
• Built-in power failure detection and battery switchover
• Automatic calendar corrections for leap years and month lengths
• Two alarm interrupts and programmable watchdog timer

Real Time Clock Applications

• Industrial systems requiring precise timekeeping
• Consumer electronics with battery backup needs
• Data logging devices requiring non-volatile time storage

Real Time Clock Part Context

The M41T82RM6E belongs to the M41T8x family of RTCs, which also includes variants like M41T81, M41T83, and evaluation tools such as STEVAL-IFR001V1. This specific part is packaged in SO-8 and is designed for applications needing reliable timekeeping with minimal power consumption. It serves as a component within broader system designs rather than a standalone development tool.

Real Time Clock Replacement Considerations

Direct replacements include other M41T8x series parts like M41T82M6F or M41T81M6F, depending on feature requirements. Cross-model compatibility should be verified against pinout and register maps. No official substitute part numbers are explicitly confirmed in the provided data.