8-bit I2C I/O expander in DIP-18 package, operating from 1.8–5.5V. Up to eight devices on one bus via A0–A2 address pins; each GPIO configurable with optional pull-up. Interrupt output available.

Pinout

Logical pinout · physical placement not verified
MCP23008 P DIP-18GP0A0GP1A1GP2A2GP3NCGP4SCLGP5SDAGP6INTGP7NCVSSVDD
  • GP01
    Type · GPIO
  • GP12
    Type · GPIO
  • GP23
    Type · GPIO
  • GP34
    Type · GPIO
  • GP45
    Type · GPIO
  • GP56
    Type · GPIO
  • GP67
    Type · GPIO
  • GP78
    Type · GPIO
  • VSS9
    Type · Ground
  • A010
    Type · Analog
  • A111
    Type · Analog
  • A212
    Type · Analog
  • NC13
    Type · Control
  • SCL14
    Type · I2C
  • SDA15
    Type · I2C
  • INT16
    Type · Signal
  • NC17
    Type · Control
  • VDD18
    Type · Power

Bare ICs

67 other options

74HC logic gates, MCP3008/MCP23017 ADCs and expanders, 24LC256 EEPROM, 4N25-series optocouplers and ULN2803A drivers — bare DIP chips with no breakout-board conveniences like pull-ups or level shifting.

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