The M41T00 from STMicroelectronics is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator (external crystal controlled). This highly integrated timekeeping solution is designed for a wide array of applications requiring accurate timekeeping and includes features that extend battery life and enhance system reliability.

Key Features

• Counters for Seconds, Minutes, Hours, Day, Date, Month, Years, and Century
• 400 kHz I²C serial interface
• Automatic power-fail detect and switch circuitry
• Ultra-low battery supply current of 1μA
• Programmable alarm and interrupt function
• Software clock calibration for high accuracy timekeeping
• 56-byte, battery-backed, non-volatile (NV) RAM for data storage
• Operating voltage range: 2.7V to 5.5V
• Operating temperature range: -40°C to 85°C

Applications

The M41T00 is ideal for applications that require precise timekeeping, such as:

• Consumer electronics (e.g., VCRs, DVDs, TVs)
• Telecommunication systems
• Embedded systems
• Office electronics (e.g., fax machines, printers)
• Portable instrumentation
• Industrial control systems

Product Description

This RTC device offers a serial interface to communicate with microcontrollers and includes a programmable alarm and interrupt function that can be used for various time-related functions. The M41T00 also features an automatic backup to battery power, ensuring that timekeeping continues uninterrupted during power outages. The software clock calibration allows for fine-tuning of the timekeeping to compensate for crystal variations due to temperature and other environmental factors.

With its small footprint and low power consumption, the M41T00 is a practical choice for design engineers looking to integrate a reliable timekeeping function into their systems without significantly impacting the overall power budget or board space.

For more detailed information, datasheets, and support, visit the STMicroelectronics website.