MCP23017 IO Expansion Board, Expands 16 I/O Pins (WS-15391)

MCP23017 IO Expansion Board, I2C Interface, Expands 16 I/O Pins

Overview

The MCP23017 IO Expansion Board expands 2 signal pins as 16 I/O pins based on the I2C bus, up to 8 MCP23017 IO Expansion Board can be used at the same time, providing up to 128 I/O pins, it is compatible with both 3.3V and 5V levels.

Features

• I2C controlled, expands 2 signal pins as 16 I/O pins 
• I2C address configurable by shorting the A0/A1/A2 jumpers
• Provides two connector options: PH2.0 terminal and/or solder pads, allows multi I2C modules to be stacked
• Onboard voltage translator, compatible with 3.3V/5V level
• Comes with development resources and manual (examples for Raspberry Pi / micro:bit / Arduino / STM32)

Specifications

• Operating voltage: 5V/3.3V
• Interface: I2C
• Interrupt pins: INTA, INTB
• Expansion I/Os: 16
• Dimension: 38mm × 23mm
• Mounting hole size: 2.0mm

Interface Definition

PIN	I2C
VCC	Power supply, 3.3V/5V
GND	Ground
SDA	I2C data line
SCL	I2C clock line
INTA	PA group interrupt output
INTB	PB group interrupt output

Dimensions

Development Resources

Wiki : www.waveshare.com/wiki/MCP23017_IO_Expansion_Board