Tutorial: PCA9555D / PCA9555DB

Adapts or transmits signals between devices.

PCA9555D / PCA9555DB

Tutorial / documentation

Communication

Quick documentation & first test preparation

  1. Identify component PCA9555D 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.

PCA9555D

IO expander 16 GPIO, I2C 400kHz, Interrupt, 2.3 - 5.5V, SOIC-24

  • IO expander 16 GPIO, I2C 400kHz, Interrupt, 2.3 - 5.5V, 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

PCA9555DB

IO expander 16 GPIO, I2C 400kHz, Interrupt, 2.3 - 5.5V, SSOP-24

  • IO expander 16 GPIO, I2C 400kHz, Interrupt, 2.3 - 5.5V, SSOP-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.