33-Channel Multiple Switch Detection Interface with Programmable Current

CD1030

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The CD1030 is a multiple switch detection interface (MSDI) designed to detect the closing and opening of up to 33 switch contacts. The switch status, either open or closed, is transferred to the microprocessor through a SPI in automotive environments.

  • This SMARTMOS® device features a 35-to-1 analog multiplexer for reading analog inputs.
  • The analog input signal is buffered and provided on the analog multiplexer (AMUX) output pin for the MCU to read
  • Individually selectable input currents are available in Normal and Low-Power Mode
  • Battery and temperature monitor are included in the IC and available via the AMUX pin
  • Interfaces with any MCU that supports SPI communications

Product Details

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Block Diagram

CD1030 Block Diagram

CD1030 Functional Internal Block Diagram
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Features

Key Features

  • Fully functional operation 4.5V ≤ VBATP ≤ 36V
  • Full parametric operation 6.0V ≤ VBATP ≤ 28V
  • Operating switch input voltage range from -1.0V to 36V
  • 12 programmable inputs (switches to battery or ground)
  • 21 switch-to-ground inputs
  • Selectable wetting current (2.0, 6.0, 8.0, 10, 12, 14, 16, or 20mA)
  • Interfaces directly to an MCU using 3.3V/5.0V SPI protocol
  • Selectable wake-up on change of state
  • Typical standby current IBATP = 50uA and IDDQ = 10uA
  • Active interrupt (INT_B) on switch state change
  • Integrated battery and temperature sensing
  • Switch monitoring device function
  • Package termination count: 48
  • Package type HLQFP48
  • Ambient operating temperature -40 to 125 °C

Product Longevity Program

  • This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The The CD1030 is included in the 15-year program

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