M41T11M6E

Real Time Clock Overview

The M41T11M6E is a Real-Time Clock (RTC) IC manufactured by STMicroelectronics, designed for precise timekeeping and data storage in embedded systems. It integrates a low-power static CMOS RAM with a high-precision RTC function controlled by an external crystal oscillator operating at 32.768 kHz. The device features an I²C bus-compatible serial interface for efficient communication with microcontrollers. Key specifications include a supply voltage range of 2.0V to 5.5V, with a maximum current consumption of 70µA during operation. It offers 56 bytes of general-purpose RAM and supports BCD format for seconds, minutes, hours, day, date, month, and year, including automatic leap-year compensation.

Real Time Clock Feature Summary

• Integrates a Real-Time Clock with calendar functionality and 56 bytes of user-accessible SRAM.
• Features an I²C bus-compatible serial interface for simplified system integration.
• Includes automatic power-fail detection and detection circuitry for seamless battery backup switching.
• Supports software-programmable clock calibration to enhance timekeeping accuracy.

Real Time Clock Applications

• Industrial automation systems requiring reliable time stamping.
• Consumer electronics devices needing accurate clock/calendar functions.
• Battery-backed data logging applications utilizing the integrated SRAM.

Real Time Clock Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity upon receipt, as surface-mount components are sensitive to physical damage. Check manufacturing dates against project requirements due to potential lifecycle variations. Ensure compatibility with existing I²C bus protocols before integration into final designs.

Real Time Clock Selection Notes

Select this component when a combination of timekeeping and non-volatile data storage is required within a single package. The 56-byte SRAM capacity suits moderate data logging needs without external memory chips. Verify that the system design accommodates the 28-pin SOH package dimensions and provides space for the external 32.768 kHz crystal resonator necessary for oscillator operation.

Real Time Clock Part Context

The M41T11 series belongs to STMicroelectronics' TIMEKEEPER family of RTCs. This specific model, M41T11M6E, denotes the I²C interface variant housed in a 28-SOP package with a width of 8.89mm. It shares functional similarities with other members like the M41T11MH but differs in packaging and specific suffix configurations defined by the manufacturer.

Real Time Clock Replacement Considerations

Direct replacements must match the 28-pin SOP footprint and I²C interface. Consider the M41T11MH if a different pinout configuration is acceptable. Verify that any substitute maintains the 2.0V–5.5V supply range and similar current consumption profiles to ensure power budget compliance.