The MCP7940NT-I/MNY is a low-power I²C RTCC clock chip with alarm and calendar functions, designed for embedded timekeeping and timing applications.

Developed by Microchip, this real-time clock/calendar (RTCC) chip provides comprehensive timekeeping capabilities with the following features:

• Integrated crystal oscillator for accurate timekeeping
• Automatic leap year compensation
• Alarm interrupt functionality
• Square-wave output functions
• I²C communication interface
• Wide operating voltage range
• Ultra-low standby power consumption
• Compact package design

The device accurately tracks seconds, minutes, hours, days, weeks, months, and years, making it ideal for timekeeping, timing alarms, and timestamp recording in embedded electronic products.