MCP79400/MCP79401/MCP79402
Battery-Backed I2C Real-Time Clock/Calendar with
SRAM and Protected EEPROM
Device Selection Table
Part Number Operating Ranges
Protected EEPROM MCP79400 Unprogrammed MCP79401 EUI-48в„ў MCP79402 EUI-64в„ў 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:
-В±1 ppm resolution
-В±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 ВµA at 3.3V
-Operating from battery backup: 925 nA at
3.0V Automatic Switchover to Battery Backup User Memory 64-Byte Battery-Backed SRAM 64-Bit Protected EEPROM Area: …