M41T00SM6F

Real Time Clock Overview

The M41T00SM6F is a low-power serial real-time clock (RTC) IC manufactured by STMicroelectronics. It features an I2C bus interface for bidirectional data transfer and includes a built-in power sense circuit that automatically switches to battery backup during power failures. The device maintains time in BCD format with automatic leap year correction valid until 2100. Operating voltage ranges from 2.0 V to 5.5 V, with a maximum operating current of 70 µA at 2 V. It supports a 400 kHz I2C protocol and operates within a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• I2C Serial Interface: Supports standard and fast mode protocols up to 400 kHz.
• Automatic Power Switching: Built-in circuit detects power failure and seamlessly switches to battery supply.
• Calendar Functionality: Includes counters for seconds, minutes, hours, day, date, month, year, and century with automatic leap year adjustment.
• Low Power Consumption: Maximum operating current of 70 µA at 2 V; ultra-low battery standby current of 0.6 µA.

Real Time Clock Applications

• Data logging systems requiring precise timestamping.
• Industrial control equipment needing reliable timekeeping.
• Consumer electronics with calendar and alarm functions.

Real Time Clock Procurement Notes

Verify component authenticity through authorized distributors. Confirm RoHS compliance status as older revisions may differ. Check for obsolescence notices or lifecycle changes before finalizing procurement plans. Ensure packaging type matches assembly requirements.

Real Time Clock Selection Notes

Select this RTC for applications requiring simple I2C integration and automatic battery switchover. Compare against M41T00 variants based on package availability and specific voltage requirements. Consider the 8-byte SRAM limitation if additional non-volatile storage is needed.

Real Time Clock Part Context

The M41T00 series belongs to STMicroelectronics' family of serial real-time clocks. The 'S' suffix typically denotes the SOIC-8 surface-mount package variant. This component is part of a long-standing product line designed for cost-effective timekeeping solutions in embedded systems.

Real Time Clock Replacement Considerations

Direct substitute: M41T00M6F. Verify pinout compatibility and electrical specifications before substitution. Check manufacturer documentation for any functional differences between legacy and current production runs.