M41T11MH6F

Real Time Clock Overview

The M41T11MH6F is a low-power serial real-time clock (RTC) IC manufactured by STMicroelectronics. It integrates a 32.768 kHz oscillator with built-in load capacitance and provides 56 bytes of non-volatile static RAM (NVSRAM). The device operates on a supply voltage ranging from 2.0 V to 5.5 V, with a typical battery backup current of 0.8 µA at 3 V. It features an I²C bus interface supporting the 100 kHz protocol. The component is housed in a 28-lead SOIC package with a SNAPHAT socket option and is rated for industrial operating temperatures between -40°C and +85°C.

Real Time Clock Feature Summary

• Integrated 32.768 kHz oscillator with 12.5 pF load capacitance for high stability
• 56 bytes of general-purpose NVSRAM for data storage
• I²C bus interface compatible with 100 kHz protocol
• Automatic leap year compensation and software clock calibration

Real Time Clock Applications

• Smart grid distribution and smart meters
• Industrial automation systems requiring timekeeping
• Battery-backed embedded data logging applications

Real Time Clock Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to ensure compatibility with required packaging options such as tape and reel or cut tape. Confirm that the SNAPHAT socket is ordered separately if surface-mount assembly with top-side battery access is required. Check RoHS compliance status and moisture sensitivity level (MSL 3) during storage and handling procedures.

Real Time Clock Selection Notes

Select this component when an I²C interface is preferred over SPI for RTC functionality. Ensure the system design accommodates the 2.0 V to 5.5 V operating voltage range. Consider the 56-byte RAM capacity for user data needs. Verify that the external crystal matches the integrated 12.5 pF load capacitance requirement for accurate timing.

Real Time Clock Part Context

The M41T11MH6F belongs to the M41T11 series of Timekeeper® SRAM devices. It is part of STMicroelectronics' portfolio of low-power real-time clocks designed for industrial and consumer applications. The 'MH6F' suffix typically denotes specific packaging and environmental compliance attributes within the standard M41T11 product line.

Real Time Clock Replacement Considerations

The M41T11MH6E is a related variant in the same family, though it is listed as obsolete in some distributor records. Direct pin-compatible replacements should be verified against the latest STMicroelectronics documentation to ensure identical interface protocols and memory sizes.