M41T81M6E

Real Time Clock Overview

The M41T81M6E is a low-power serial real-time clock (RTC) IC manufactured by STMicroelectronics. It features an integrated 32.768 kHz oscillator and communicates via a two-wire I²C bus interface supporting the 400 kHz protocol. The device provides non-volatile time-of-day clock/calendar functionality with automatic leap year correction valid until 2100. It includes 20 bytes of SRAM for user data, alarm interrupts, watchdog timer, and programmable square wave output. The component operates within a supply voltage range of 2 V to 5.5 V and is housed in an 8-pin SOIC package.

Real Time Clock Feature Summary

• Integrated 32.768 kHz oscillator with built-in load capacitance
• I²C serial interface with 400 kHz support
• Automatic power failure detection and battery switchover
• 20 bytes of non-volatile SRAM for calendar, alarm, and user data

Real Time Clock Applications

• Portable electronic devices requiring precise timekeeping
• Industrial systems with battery backup requirements
• Consumer appliances needing calendar and alarm functions

Real Time Clock Procurement Notes

Verify component status as the M41T81M6E may be obsolete or discontinued. Confirm availability through authorized distributors and check for direct replacement options such as the M41T81M6F. Ensure that ordering suffixes do not imply functional changes without explicit manufacturer documentation.

Real Time Clock Selection Notes

Select this RTC for applications requiring low power consumption and simple I²C integration. Consider the M41T81S variant for new designs if specified by the manufacturer. Verify operating temperature ranges (-40°C to +85°C) and voltage compatibility (2.0 V to 5.5 V) against system constraints.

Real Time Clock Part Context

The M41T81M6E belongs to the M41T81 series of serial RTCs from STMicroelectronics. This family is designed for cost-effective timekeeping solutions in embedded systems. The 'M6E' suffix typically denotes specific packaging and environmental compliance characteristics within the SOIC-8 form factor.

Real Time Clock Replacement Considerations

The M41T81M6F is listed as a direct substitute for the M41T81M6E. Verify pinout compatibility and electrical specifications before implementation.