M41T256YMH7F

Real Time Clock Overview

The M41T256YMH7F is a Real-Time Clock (RTC) IC from STMicroelectronics, part of the Timekeeper series. It integrates a clock/calendar function with 32KB of Non-Volatile Static RAM (NVSRAM). The device communicates via an I2C serial interface and operates within a supply voltage range of 4.5V to 5.5V. It supports date formats including YY-MM-DD-dd and time formats HH:MM:SS in 24-hour mode. Key features include leap year compensation and automatic calendar adjustment. The component is designed for surface mount installation in a 44-lead SOH package.

Real Time Clock Feature Summary

• Integrated 32KB NVSRAM for data retention without battery backup
• I2C serial interface for microcontroller connectivity
• Automatic leap year compensation up to 2099
• Operating temperature range of -25°C to +70°C

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Data logging equipment needing non-volatile storage
• Consumer electronics with calendar functions

Real Time Clock Procurement Notes

Verify the specific suffix 'F' against the manufacturer's current datasheet to confirm package type and RoHS compliance status. Cross-reference the part number with official STMicroelectronics distribution channels to ensure authenticity and check for any end-of-life notifications or alternative recommendations.

Real Time Clock Selection Notes

Select this component when both real-time clock functionality and substantial non-volatile memory are required in a single package. Ensure the system design accommodates the 44-pin SOH footprint and the 4.5V to 5.5V power supply requirements. Verify that the I2C bus speed compatibility matches the host controller specifications.

Real Time Clock Part Context

This part belongs to the M41T256 family of RTCs with integrated NVSRAM. It shares functional similarities with other Timekeeper series devices but is distinguished by its 32KB memory capacity and specific 44-lead packaging. It serves as a combined timing and storage solution for embedded applications.

Real Time Clock Replacement Considerations

Check for pin-compatible alternatives within the M41T256 series or newer generations such as the M41T62 series if updated features are needed. Confirm electrical parameter equivalence before substitution.