STMicroelectronics

M41ST85WMX6

M41ST85WMX6 Description

The M41ST85WMX6 from STMicroelectronics is a highly integrated Real-Time Clock (RTC) and Calendar IC designed for precision timekeeping in embedded systems. Operating within a 2.7V to 3.6V supply range, it features a 44-byte NVSRAM for non-volatile data storage, ensuring data retention during power loss. The device supports I2C communication, making it compatible with a wide range of microcontrollers. With a timekeeping current as low as 0.5mA, it is optimized for low-power applications. The RTC provides 24-hour time format (HH:MM:SS:hh) and includes advanced functionalities like leap year compensation, ensuring long-term accuracy.

M41ST85WMX6 Features

• Clock/Calendar Functionality: Tracks time, date, and leap years with high precision.
• Integrated NVSRAM: 44-byte non-volatile memory for critical data storage.
• Low Power Consumption: 0.5mA max timekeeping current at 2.7V–3.6V.
• Battery Backup: Supports 2.5V–3.5V battery supply for uninterrupted operation.
• Advanced Features: Includes alarm, square wave output, watchdog timer, and supervisor functions for system monitoring.
• Robust Design: ROHS3 compliant and REACH unaffected, suitable for industrial environments.
• Surface-Mount Package: 28-pin SOIC for compact PCB integration.

M41ST85WMX6 Applications

• Industrial Automation: Reliable timekeeping for PLCs, sensors, and control systems.
• Medical Devices: Ensures accurate timestamping in patient monitoring equipment.
• Smart Meters: Battery-backed timekeeping for energy measurement systems.
• Automotive Electronics: Used in dashboards, telematics, and infotainment systems.
• IoT Edge Devices: Low-power operation ideal for battery-powered sensors and gateways.

Conclusion of M41ST85WMX6

The M41ST85WMX6 stands out for its low power consumption, integrated NVSRAM, and multifunctional features, making it a versatile solution for applications requiring reliable timekeeping and data retention. Its industrial-grade robustness and battery backup capability ensure uninterrupted performance in critical systems. While now obsolete, its legacy as a high-performance RTC remains relevant for designs prioritizing precision and functionality.