MCP79401 - MICROCHIP

MCP79401 I2C Real-Time Clock Calendar

MCP79400/MCP79401/MCP79402 Battery-Backed I2C Real-Time Clock/Calendar with SRAM and Protected EEPROM Device Selection Table Part Number MCP79400 MCP79401 MCP79402 Protected EEPROM Unprogrammed EUI-48™ EUI-64™ Timekeeping Features • Real-Time Clock/Calendar (RTCC): - Hours, Minutes, Seconds, Day of Week, Day, Month, Year - Leap year compensated to 2399 -.

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
• 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 voltage rang.