Tutorial: PCA9539xBS / PCA9539xD

Adapts or transmits signals between devices.

PCA9539xBS / PCA9539xD

Tutorial / documentation

Communication

Quick documentation & first test preparation

  1. Identify component PCA9539xBS and its package.
  2. Identify the protocol, logic levels and each pin’s function.
  3. Check required termination and pull-up/pull-down resistors.
  4. Consult the application circuit in the linked documentation before testing.

PCA9539xBS

16-bit I/O expander, I2C / SMBus interface, interrupt and reset pins, VQFN-24

  • 16-bit I/O expander, I2C / SMBus interface, interrupt and reset pins, VQFN-24
  • Identify the protocol, logic levels and each pin’s function.
  • Check required termination and pull-up/pull-down resistors.
  • The manufacturer’s pinout and absolute limits take precedence over this page.
Technical documentation

PCA9539xD

16-bit I/O expander, I2C / SMBus interface, interrupt and reset pins, SOIC-24

  • 16-bit I/O expander, I2C / SMBus interface, interrupt and reset pins, SOIC-24
  • Identify the protocol, logic levels and each pin’s function.
  • Check required termination and pull-up/pull-down resistors.
  • The manufacturer’s pinout and absolute limits take precedence over this page.
Technical documentation

Inputs and outputs must match the function described in the selected reference’s documentation.