M41T56MH6 – Serial Real-Time Clock (RTC) with SRAM – STMicroelectronics

This M41T56MH6 serial real-time clock module from STMicroelectronics provides precise timekeeping and non-volatile data storage for embedded systems. Engineered for ultra-low power operation and I²C interface compatibility, it delivers reliable timing solutions while minimizing design complexity. PCX guarantees genuine STMicroelectronics components with same-day shipping and dedicated technical support.

Key Features

• Ultra-Low Power Consumption: Ideal for battery-backed applications
• 56 Bytes of General-Purpose SRAM: Non-volatile data storage
• I²C Serial Interface: Simplifies board-level integration
• Wide Voltage Range: Operates from 2.0V to 5.5V
• Integrated 32.768 kHz Oscillator: Precision timekeeping
• Industrial Temperature Range: -40°C to +85°C operation

Technical Details

This RTC IC features a serial I²C bus interface with automatic clock speed detection (Standard mode up to 100kHz). The embedded oscillator requires no external components for timebase generation, while the built-in power-fail detect circuit and automatic switchover to backup supply ensure continuous operation. Timekeeping accuracy is maintained through programmable calibration registers.

Typical Applications

• Industrial automation controllers
• Smart meters and energy monitoring systems
• Medical diagnostic equipment
• POS terminals and kiosks
• Automotive data loggers

About STMicroelectronics

STMicroelectronics is a global semiconductor leader with over 30 years of innovation in microelectronics. Their components are renowned for industrial-grade reliability and advanced power efficiency, serving mission-critical applications worldwide. The company maintains rigorous quality certifications including IATF 16949 for automotive and ISO 9001 for industrial markets.

STMicroelectronics’ commitment to sustainable technology and vertical manufacturing integration ensures consistent performance across production batches. Their extensive IP portfolio in analog, power management, and embedded systems makes them a preferred partner for complex electronic designs requiring long-term component availability.

About Real-Time Clocks (RTC)

Real-Time Clock ICs provide critical time-stamping and calendar functions for electronic systems independent of main processors. They maintain accurate time during power cycles using minimal backup power, enabling event logging, scheduled operations, and time-sensitive data collection. Modern RTCs often integrate additional features like temperature compensation, alarms, and non-volatile memory.

In embedded designs, RTC modules serve as system heartbeat generators for applications requiring precise temporal coordination. Their low-power architecture makes them indispensable for portable devices, IoT sensors, and infrastructure equipment where battery backup or energy harvesting is implemented. Advanced RTCs support automatic daylight saving adjustments and leap-year calculations.

Packaging Options

Available in industry-standard SO-8 (150mil) packaging. Contact PCX sales for Tape & Reel, Cut Tape, or loose quantity requirements.

Frequently Asked Questions

Q: What backup voltage does this RTC require?
A: The M41T56MH6 operates with backup voltages as low as 1.3V, enabling extended operation from coin cells or supercapacitors.

Q: Is external crystal required for operation?
A: No, this module includes an integrated 32.768 kHz oscillator – no external timing components needed.

Q: Does it support battery-backed timekeeping during main power loss?
A: Yes, automatic switchover circuitry maintains timekeeping and SRAM contents during power interruptions.

Q: What’s the typical timekeeping accuracy?
A: Factory-calibrated to ±5ppm at 25°C (±0.43 seconds/day), with programmable digital trimming for improved precision.

Q: How does the I²C addressing work?
A: Features two programmable address pins supporting up to four devices (1101xxxb base address) on the same bus.

Q: Can I use this in automotive applications?
A: While not AEC-Q100 certified, its industrial temperature range (-40°C to +85°C) suits many automotive subsystems.

For detailed specifications, download the datasheet from PCX.

Product images are representational; refer to datasheet for exact specifications.

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