Automotive Accurate RTC with Integrated Quartz Crystal

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Block Diagram

PCA2129 Block Diagram

PCA2129 Block Diagram

Features

  • AEC-Q100 compliant for automotive applications
  • Operating temperature range from -40 °C to +85 °C
  • Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors
  • Typical accuracy: ±3 ppm from -30 ℃ to +80 ℃
  • Integration of a 32.768 kHz quartz crystal and oscillator in the same package
  • Provides year, month, day, weekday, hours, minutes, seconds, and leap year correction
  • Timestamp function:
    • with interrupt capability
    • detection of two different events on one multilevel input pin (for example, for tamper detection)
  • Two line bidirectional 400 kHz Fast-mode I²C-bus interface
  • 3 line SPI-bus with separate data input and output (maximum speed 6.5 Mbit/s)
  • Battery backup input pin and switch-over circuitry
  • Battery backed output voltage
  • Battery low detection function
  • Power-On Reset Override (PORO)
  • Oscillator stop detection function
  • Interrupt output (open-drain)
  • Programmable 1 second or 1 minute interrupt
  • Programmable watchdog timer with interrupt
  • Programmable alarm function with interrupt capability
  • Programmable square output
  • Clock operating voltage: 1.8 V to 4.2 V
  • Low supply current: typical 0.70 μA at VDD = 3.3 V
  • Electronic metering for electricity, water, and gas
  • Precision timekeeping
  • Access to accurate time of the day
  • GPS equipment to reduce time to first fix
  • Applications that require an accurate process timing
  • Products with long automated unattended operation time

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