STMicroelectronics

M41T65Q6F

M41T65Q6F Description

The M41T65Q6F from STMicroelectronics is a low-power Real-Time Clock (RTC) and calendar IC designed for precision timekeeping in embedded systems. Part of the Timekeeper® series, this I²C-interfaced RTC operates across a 1.3V to 4.4V supply range, making it suitable for battery-backed applications. It integrates a clock/calendar with 24-hour time format (HH:MM:SS:hh) and supports leap year correction, ensuring long-term accuracy. Despite its obsolete status, it remains a reliable choice for legacy designs requiring ultra-low power consumption (0.7µA to 0.95µA) and robust functionality.

M41T65Q6F Features

• Ultra-Low Power: Consumes as low as 0.7µA at 1.3V, ideal for battery-operated devices.
• Integrated Functions: Includes alarm, watchdog timer, and leap year compensation for enhanced system reliability.
• Wide Voltage Range: Operates from 1.3V to 4.4V, compatible with Li-ion and supercapacitor backup.
• I²C Interface: Simplifies integration with microcontrollers and other digital systems.
• Surface-Mount Package: 16-QFN (Tape & Reel) ensures compact PCB footprint.
• RoHS3 Compliant: Meets environmental standards for hazardous substance restrictions.

M41T65Q6F Applications

• Industrial Automation: Timestamping for data loggers and PLCs.
• Consumer Electronics: Clocks in smart appliances, wearables, and IoT edge devices.
• Medical Devices: Battery-backed timing for portable diagnostic equipment.
• Automotive Systems: Event recording in infotainment or telematics (non-safety-critical).
• Backup Power Systems: Supercapacitor or battery-backed RTC for UPS and energy meters.

Conclusion of M41T65Q6F

The M41T65Q6F excels in low-power timekeeping with advanced features like alarms and watchdog timers, though newer alternatives may supersede it. Its wide voltage range and I²C interface make it versatile for legacy designs in industrial, automotive, and consumer applications. Engineers valuing energy efficiency and compact integration may still find it a viable solution despite its obsolete status.

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