1. General description

The PCF85063TP is a CMOS1 Real-Time Clock (RTC) and calendar optimized for low

power consumption. An offset register allows fine-tuning of the clock. All addresses and

data are transferred serially via the two-line bidirectional I2C-bus. Maximum bus speed is

400 kbit/s. The register address is incremented automatically after each written or read

data byte.

For a selection of NXP Real-Time Clocks, see Table 35 on page 43

2. Features and benefits

 Provides year, month, day, weekday, hours, minutes, and seconds based on a

32.768 kHz quartz crystal

 Clock operating voltage: 0.9 V to 5.5 V

 Low current: typical 0.22 A at VDD = 3.3 V and Tamb = 25 C

 400 kHz two-line I2C-bus interface (at VDD = 1.8 V to 5.5 V)

 Programmable clock output for peripheral devices (32.768 kHz, 16.384 kHz,

8.192 kHz, 4.096 kHz, 2.048 kHz, 1.024 kHz, and 1 Hz)

 Selectable integrated oscillator load capacitors for CL = 7 pF or CL = 12.5 pF

 Minute and half minute interrupt

 Oscillator stop detection function

 Internal Power-On Reset (POR)

 Programmable offset register for frequency adjustment

3. Applications

 Digital still camera

 Digital video camera

 Printers

 Copy machines

 Mobile equipment

 Battery powered devices