M4T32-BR12SH6: Overview, Features, and Applications

The M4T32-BR12SH6 is a specific model of a real-time clock (RTC) module, typically produced by STMicroelectronics. RTC modules are designed to provide timing and clock information for electronic systems, often featuring integrated power management functions for maintaining accurate timekeeping even during power loss. Here's an overview of its features and potential applications:



The M4T32-BR12SH6 is a highly integrated RTC module featuring a built-in lithium battery, non-volatile memory, and a clock/calendar function. It is commonly used for providing time data to microcontrollers and other digital systems with the ability to maintain time information even when the main power source is disconnected.


These RTC modules typically offer a range of features to support accurate timing and reliable timekeeping in electronic systems:

  1. Integrated Battery: The module includes an integrated backup lithium battery to maintain timekeeping and retain settings during power loss.

  2. I2C Interface: Often equipped with an I2C (Inter-Integrated Circuit) interface for easy integration with microcontrollers and digital systems.

  3. Clock and Calendar Functions: Provides accurate timekeeping, including date and time information, and may include alarms and timers.

  4. Non-Volatile Storage: Built-in non-volatile memory for storing time and configuration data, ensuring data retention without the need for an external power supply.

  5. Automatic Switchover: Some models support automatic switchover between the main power supply and the backup battery when power is lost.

  6. Temperature-Compensated Crystal Oscillator (TCXO): Helps ensure stable, accurate timekeeping over a wide temperature range.

  7. Alarm Functions: Capable of triggering alarms or other events at specific times or intervals.


The M4T32-BR12SH6 and similar RTC modules find use in various electronic systems and applications where accurate timekeeping and power-fail management are essential:

  1. Embedded Systems: Integrated into embedded systems, including industrial controls, data loggers, and automation equipment, to provide accurate timing and scheduling functions.

  2. Consumer Electronics: Used in devices such as digital clocks, smart appliances, and home automation systems for maintaining accurate time and scheduling events.

  3. Communication Equipment: Integrated into networking and communication equipment for accurate timestamping of data and event scheduling.

  4. Automotive Systems: Incorporated into automotive electronics for timekeeping and power management functions.

  5. Medical Devices: Utilized in medical instruments and devices requiring precise timekeeping and event scheduling capabilities.

  6. Utilities and Energy Management: Implemented in energy meters and utility monitoring systems for time-based recording and billing functions.

Additional Considerations:

When integrating the M4T32-BR12SH6 or similar RTC modules into a specific application, ensuring compatibility with the required communication interface, space constraints, power consumption, and overall system requirements is crucial. Additionally, backup battery lifespan and replacement considerations are important for long-term use.

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