Automotive Tiny Real-Time Clock/Calendar with Alarm Function and I²C-Bus


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Block Diagram

PCA85073A Block diagram

PCA85073A Block diagram


Key Features

  • AEC-Q100 grade 2 compliant for automotive applications
  • Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
  • Low current; typical 0.25 µA at VDD = 3.0 V and Tamb = 25 °C
  • 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)
  • Alarm function
  • Minute and half minute interrupt
  • Internal Power-On Reset (POR)
  • High temperature operation range: —40 °C to +105 °C
  • Clock operating voltage: 0.9 V to 5.5 V
  • 400 kHz two-line I2C-bus interface (at VDD = 1.8 V to 5.5 V)
  • Selectable integrated oscillator load capacitors for CL = 7 pF or CL = 12.5 pF
  • Countdown timer
  • Oscillator stop detection function
  • Programmable offset register for frequency adjustment
  • Latch-up performance exceeds 100 mA per JESD 78, Class II
  • ESD protection exceeds JESD 22
    • 4000 V Human-Body Model (A114-A)
    • 1000 V Charged-Device Model (C101)
  • Package offered: TSSOP8

Product Longevity Program

  • This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The PCA85073ADP/Q900 is included in the 10-year program

Part numbers include: PCA85073ADP.


Quick reference to our documentation types.

3 documents

Design Resources


3 hardware offerings


1 software file

Note: For better experience, software downloads are recommended on desktop.


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