Automotive

Proven IO expansion technology

NXP’s GPIOs provide reliable IO expansion for most microprocessor families, allowing designers to save GPIOs on microcoprocessors for other important functions. Devices are about to become available for SPI and I2C bus interface and with 8 or 16 IOs.

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Key features and benefits

  • Easily adds I/Os via I²C or SPI-bus for input/output, key scan or to control LEDs
  • Combats “Feature Creep” by expanding I/O ports instead of requirement for new µC
  • Allows seamless migration to newer µC and still keeps the same peripherals
  • Eliminates costly congested PCB since a trace or wire is not needed for each signal
  • Automotive AEC-Q100 compliant qualification for highest reliability and robustness
  • IO expansion for 8 or 16 inputs and/or outputs
  • I²C and/or SPI-bus interface
  • Interrupt output and/or Reset input
  • Up to 18 V tolerant inputs
  • Maskable inputs

Key applications

  • Body Control Units
  • Instrument clusters
  • Car radios

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Descriptive summary

NXP’s GPIOs are useful in any application where the number of GPIOs on the microprocessor is not sufficient. With the requirement for more functionality and features such as LED control, fan control, push button input control, system monitoring or humidity sensing, the relatively small numbers of GPIOs on microprocessors are becoming a limiting factor. Adding IO expansion with NXP’s GPIOs overcomes these limitations.

Our GPIOs are available with either I2C bus or SPI bus interface and offer from 8 to 16 IOs. Some of the products feature an additional INT (INTerrupt) output and/or a RESET or OE (Output Enable) input. The INT output is used to signal the microcontroller when any of the inputs change state (1 to 0, or 0 to 1). The RESET input can be used to initialize the device to its default state without de-powering it.

Products

Type numberDescriptionStatusQuick access
PCA9703PW18 V tolerant SPI 16-bit GPI with maskable INT Download datasheet
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