Real-Time Clock/Calendar

I2C™ RTCC Block Diagram
I2C RTCC Products

Timing Features

  • Hours, minutes, seconds
  • Day of the week, day, month and year
  • Dual alarms: Single IRQ Out using VCC or VBAT
  • Programmable clock: 1 Hz to 32 KHz using VCC
  • Digital Trimming from -127 ppm to +127 ppm
    • Up to 11 second/day
  • Timestamp at Battery Switchover
    • VCC to VBAT
    • VBAT to VCC

NOTE: 1 PPM ≈ 86 Milliseconds/Day

Memory

SRAM

  • 64 bytes

EEPROM

  • 1 Kbits (or None)

Unique ID

  • 64 bits (or None)

Unique ID Programming

  • 0 = Blank
  • 1 = EUI-48 MAC Address
  • 2 = EUI-64 MAC Address

Voltage and Current

  • Main Power (Oscillator running)
    • VCC = 1.8V to 5.5V
    • ICC = < 5 μA
  • Battery Backup (Timekeeping & RAM)
    • VBAT = 1.3V to 5.5V
    • IBAT = < 700 nA
<