I2C Real-Time Clock Calendar
MCP79400/MCP79401/MCP79402
Battery-Backed I2C Real-Time Clock/Calendar with SRAM and Protected EEPROM
Device Selection ...
Description
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 - 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 range of 1.3V to 5.5V
Low Typical Timekeeping Current: - Operating from VCC: 1.2 µA at 3.3V - Operating from battery backup: 925 nA at 3.0V
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