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MCP23S08 - 8-Bit I/O Expander

Download the MCP23S08 datasheet PDF. This datasheet also includes the MCP23008 variant, as both parts are published together in a single manufacturer document.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (MCP23008_MicrochipTechnology.pdf) that lists specifications for multiple related part numbers.

Overview

MCP23008/MCP23S08 8-Bit I/O Expander with Serial Interface.

Key Features

  • 8-Bit Remote Bidirectional I/O Port - I/O pins default to input.
  • High-Speed I2C Interface (MCP23008) - 100 kHz - 400 kHz - 1.7 MHz.
  • High-Speed SPI Interface (MCP23S08) - 10 MHz.
  • Hardware Address Pins - Three for the MCP23008 to allow up to eight devices on the bus - Two for the MCP23S08 to allow up to four devices using the same Chip Select.
  • Configurable Interrupt Output Pin - Configurable as active-high, active-low or open-drain Block Diagram MCP2.

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