The MICROCHIP TECH. part MCP7940NT-I/MNY is a versatile Battery-Backed I2C Real-Time Clock/Calendar with a 64-byte SRAM. It operates in the voltage range of 1.8V to 5.5VDC and supports both 12-hour and 24-hour time formats. Designed for reliability, it uses the I2C communication protocol and can operate in extreme temperatures, ranging from -40°C to +85°C. The compact 8-lead TDFN package, supplied in Tape&Reel format, makes it suitable for a wide range of applications.