Tutorial: MCP23018x-x-MJ / MCP23018x-x-SO

Adapts or transmits signals between devices.

MCP23018x-x-MJ / MCP23018x-x-SO

Tutorial / documentation

Communication

Quick documentation & first test preparation

  1. Identify component MCP23018x-x-MJ 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.

MCP23018x-x-MJ

16-bit I/O expander, I2C interface, open-drain outpus (with configurable pull-up resistors), 2 interrupt outputs, VQFN-24

  • 16-bit I/O expander, I2C interface, open-drain outpus (with configurable pull-up resistors), 2 interrupt outputs, 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

MCP23018x-x-SO

16-bit I/O expander, I2C interface, open-drain outpus (with configurable pull-up resistors), 2 interrupt outputs, SOIC-28

  • 16-bit I/O expander, I2C interface, open-drain outpus (with configurable pull-up resistors), 2 interrupt outputs, SOIC-28
  • 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.