STMicroelectronics

M41T81SMY6F

M41T81SMY6F Description

The M41T81SMY6F from STMicroelectronics is a high-performance Real-Time Clock (RTC) IC designed for precision timekeeping and calendar functions in embedded systems. This surface-mount device operates over a wide voltage range (2.7V to 5.5V) and supports battery backup (2V to 3.5V), ensuring uninterrupted operation during power loss. It communicates via I2C interface and integrates a clock/calendar with 24-hour time format (HH:MM:SS:hh), leap year compensation, and alarm functionality. Packaged in an 18-SOX tape-and-reel format, it is RoHS3 compliant and suitable for industrial and consumer applications requiring reliable timekeeping.

M41T81SMY6F Features

• Low Power Consumption: Only 100µA timekeeping current at 2.7V–5.5V, ideal for battery-powered devices.
• Advanced Functions: Includes alarm, leap year correction, square wave output, and watchdog timer for system monitoring.
• Wide Voltage Range: Supports 2.7V–5.5V main supply and 2V–3.5V backup, ensuring compatibility with diverse power architectures.
• Robust Design: REACH unaffected and MSL 1 (unlimited) rated, suitable for long-term storage and harsh environments.
• Compact & Reliable: 18-SOX package with surface-mount technology for space-constrained PCB designs.

M41T81SMY6F Applications

• Industrial Automation: Timestamping for data loggers, PLCs, and control systems.
• Consumer Electronics: Smart meters, appliances, and IoT devices requiring accurate timekeeping.
• Medical Devices: Vital for patient monitoring systems and diagnostic equipment.
• Automotive Systems: Backup clocks for infotainment and telematics units.
• Energy Management: Smart grid and renewable energy systems with time-based event tracking.

Conclusion of M41T81SMY6F

The M41T81SMY6F stands out as a versatile, low-power RTC solution with alarm, watchdog, and leap year support, making it superior to basic RTCs. Its wide voltage range, I2C interface, and robust packaging ensure reliability in demanding applications. Whether for industrial, automotive, or consumer electronics, this IC delivers precision, efficiency, and integration, reducing BOM complexity while enhancing system performance.