MCP7940N - Microchip

MCP7940N Real-Time Clock/Calendar

MCP7940N Battery-Backed I2C™ Real-Time Clock/Calendar with SRAM Timekeeping Features: • Real-Time Clock/Calendar (RTCC): - Hours, Minutes, Seconds, Day of Week, Day, Month, Year - Leap year compensated to 2399 - 12/24 hour modes • Oscillator for 32.768 kHz Crystals: - Optimized for 6-9 pF crystals • On-Chip Digital Trimming/Calibration: - ±1 PPM resolution .

Features

• Real-Time Clock/Calendar (RTCC): - Hours, Minutes, Seconds, Day of Week, Day, Month, Year - Leap year compensated to 2399 - 12/24 hour modes
• Oscillator for 32.768 kHz Crystals: - Optimized for 6-9 pF crystals
• On-Chip Digital Trimming/Calibration: - ±1 PPM resolution - ±129 PPM range
• Dual Programmable Alarms
• Versatile Output Pin: - Clock output with selectable frequency - Alarm output - General purpose output
• Power-Fail Time-Stamp: - Time logged on switchover to and from Battery mode Low-Power Features:
• Wide Voltage Range: - Operating voltage range of 1.8V to 5.5V - Backup voltag.