Real-Time Clock/Calendar

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Block Diagram

PCF8563BS, PCF8563P, PCF8563T, PCF8563TS, PCF8564ACX9, PCF8564AU


Key Features

  • Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
  • Century flag
  • Clock operating voltage: 1.0 V to 5.5 V at room temperature
  • Low backup current; typical 0.25 μA at VDD = 3.0 V and Tamb = 25 °C
  • 400 kHz two-wire I2C-bus interface (at VDD = 1.8 V to 5.5 V)
  • Programmable clock output for peripheral devices (32.768 kHz, 1.024 kHz, 32 Hz, and 1 Hz)
  • Alarm and timer functions
  • Integrated oscillator capacitor
  • Internal Power-On Reset (POR)
  • I2C-bus target address: read A3h and write A2h
  • Open-drain interrupt pin

Part numbers include: PCF8563BS, PCF8563T, PCF8563TS.


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