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.
