Microchip Technology's MCP7940M-I/SN Real-Time Clock/Calendar

The MCP7940M-I/SN is a highly integrated Real-Time Clock/Calendar (RTCC) from Microchip Technology, designed to offer a complete timekeeping solution for a wide array of applications. This compact, serial-interface RTCC is housed in an 8-pin SOIC package, making it suitable for space-constrained applications while maintaining a rich feature set.

At the heart of the MCP7940M-I/SN is a temperature-compensated crystal oscillator (TCXO) that ensures high accuracy and minimal drift over temperature variations, making it an ideal choice for applications requiring precise timekeeping. The device provides time and date information, including seconds, minutes, hours, day, date, month, and year, with leap year compensation valid up to the year 2399.

One of the standout features of the MCP7940M-I/SN is its battery backup input. This feature allows the device to continue keeping time even when the primary power source is unavailable, making it perfect for systems that require constant timekeeping capabilities, such as data loggers, smart meters, and other industrial or consumer electronics.

The MCP7940M-I/SN also includes 64 bytes of battery-backed SRAM and a unique ID with a pre-programmed EUI-48™ MAC address, which can be used for networked devices requiring unique identification. The device supports I2C communication, allowing for easy integration into microcontroller-based systems with minimal pin count.

Additional features of the MCP7940M-I/SN include:

• Two time-of-day alarms
• Power-fail timestamp
• Digital trimming for frequency offset adjustment
• Low power consumption
• Wide operating voltage range (1.8V to 5.5V)
• Operating temperature range from -40°C to +85°C

With its combination of accuracy, low power, and additional memory features, the MCP7940M-I/SN is a versatile and reliable choice for any application where time is of the essence. Whether it's for industrial control systems, consumer electronics, or IoT devices, this Microchip RTCC ensures that your product keeps accurate time, all the time.