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MCP23017 I2C 16 Bit I/O Expander IC - Pack of 3

The MCP23017 / MCP23S17 provides 16-bit parallel I/O (Input / Output) expansion for I2C bus or SPI applications.


Availability: 44 in stock

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SKU PHI1051451 Category Tag


The MCP23017 / MCP23S17 provides 16-bit parallel I/O (Input / Output) expansion for I2C bus or SPI applications.

The 16-bit I/O port functionally consists of two 8-bit ports, with these 2 ports have 2 interrupt pins as well.



  • 16-bit remote bidirectional I/O port
    • I/O pins default to input
  • High-speed I2C interface
    • 100kHz
    • 400kHz
    • 1.7MHz
  • Three hardware address pins allow up to eight devices on the bus
  • Configurable interrupt output pins
    • Configurable as active-high, active-low or open-drain
  • INTA and INTB can be configured to operate independently or together
  • Configurable interrupt source
    • Interrupt-on-change from configured register defaults or pin changes
  • Polarity inversion register to configure the polarity of the input port data
  • External reset input
  • Low standby current: 1uA (Max)



  • 3 x MCP23017 I2C 16 Bit I/O Expander IC

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