The MCP23017/MCP23S17 (MCP23X17) device family provides 16-bit, general purpose parallel I/O expansion for I2C bus or SPI applications. The two devices differ only in the serial interface:

This board features the MCP23017, a 16-bit resolution I/O expander with an I2C serial interface from Microchip. Any of the sixteen I/Os of the MCP23017 can be configured as an input or …

MCP23017-E/SP – I/O Expander 16 I2C 1.7 MHz 28-SPDIP from Microchip Technology. Pricing and Availability on millions of electronic components from Digi-Key Electronics.

MCP23017: Instantly Increase your I/O by 16 fully bidirectional I/O pins. Need more? Just add extra chips, on the same I2C interface.

Add another 16 pins to your microcontroller using an MCP23017 port expander. The MCP23017 uses two i2c pins (these can be shared with other i2c devices), and in exchange gives you 16 …

Nov 19, 2022 · In this tutorial, I will take you through the basic working principle of the IO expander. I will provide a step-by-step guide to connect an MCP23017 module to an Arduino …

Mar 18, 2024 · Learn about the MCP23017 I/O expander, its features, pinout configuration, Arduino interfacing, troubleshooting tips, and common applications. Gain insights into …

The MCP23017 is a slave I2C interface device that supports 7-bit slave addressing, with the read/write bit filling out the control byte. The slave address contains four fixed bits and three …

Mar 23, 2022 · Using the MCP23017 with Arduino involves wiring up the expander to your Arduino-compatible microcontroller, installing the Adafruit MCP23017 library and running the …

Jul 6, 2025 · The MCP23017 module provides a 16-bit general purpose bidirectional I/O port using the I2C bus at up to 1.7MHz.