M41ST87YMX6

Real Time Clock Overview

The M41ST87YMX6 is a serial real-time clock (RTC) manufactured by STMicroelectronics, belonging to the M41ST87 series. It integrates a calendar and clock function with 160 bytes of NVRAM storage capacity. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports both 12-hour and 24-hour time formats. It features backup switching capabilities to maintain timekeeping during power loss. The component is housed in a 28-pin SOIC package and is designed for surface-mount installation. It functions reliably across an industrial temperature range from -40°C to +85°C.

Real Time Clock Feature Summary

• Serial interface for RTC communication
• 160-byte NVRAM storage capacity
• Backup switching mechanism for continuous operation
• Supports HH:MM:SS:hh format in 12 or 24-hour modes

Real Time Clock Applications

• Industrial systems requiring precise timekeeping
• Equipment needing non-volatile data retention alongside RTC functions
• Systems operating within 4.5V to 5.5V power domains

Real Time Clock Procurement Notes

The M41ST87YMX6 is listed as a discontinued product by the manufacturer. Availability is restricted, and distributors may not stock this specific part number. Verification of current lifecycle status and alternative sourcing options is required before procurement planning. Check official STMicroelectronics documentation for final obsolescence confirmation.

Real Time Clock Selection Notes

Select this component only if a 5V logic interface (4.5V–5.5V) is mandatory, as other variants in the M41ST87 family support lower voltages like 2.7V–3.6V. Ensure the design accommodates the SOIC-28 package dimensions. Verify that the serial interface protocol matches the system controller's capabilities. Consider the discontinued status when designing for long-term production runs.

Real Time Clock Part Context

This part belongs to the M41ST87 series of serial RTCs from STMicroelectronics. It shares functional similarities with other members of the family but differs in supply voltage requirements and packaging. The 'Y' suffix typically denotes specific tape-and-reel or tube packaging variations, while 'MX6' indicates environmental compliance and lead-free finish. It serves as a dedicated timing solution for embedded applications.

Real Time Clock Replacement Considerations

Direct pin-to-pin replacements may include other M41ST87 series variants such as M41ST87WMX6, though voltage ranges differ. Verify compatibility with system voltage levels. No officially confirmed substitute part numbers are provided in the source data; engineering evaluation of electrical parameters is necessary for any cross-reference.