Datasheet Microchip MCP79412T-I/ST — Datenblatt

MCP79410/MCP79411/MCP79412
Battery-Backed I2C Real-Time Clock/Calendar with
SRAM, EEPROM and Protected EEPROM
Device Selection Table Operating Ranges MCP79410 Unprogrammed MCP79411 EUI-48в„ў 2-Wire Serial Interface, I2C Compatible:
-I2C clock rate up to 400 kHz Temperature Range:
-Industrial (I): -40В°C to +85В°C MCP79412 EUI-64в„ў Packages Part Number Protected EEPROM 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 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 voltage range of 1.3V to 5.5V Low Typical Timekeeping Current:
-Operating from VCC: 1.2 ВµA at 3.3V
-Operating from VBAT: 925 nA at 3.0V Automatic Switchover to Battery Backup User Memory 64-Byte Battery-Backed SRAM 1 Kbit EEPROM Memory:
-Software write-protect …