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IIC Input Output Expansion Board MCP23017-E/SS I2C Interface 16Bit 16-Channel I/O Expansion Module Pin Board Converter

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This module is the 16 way IO extension module of the 12C interface, and built in the MCP23017 chip of MicroChip. The function of the chip is complete. Each IO can be arbitrarily configured as input or output, and a pull up resistor can be set, and the interrupt function can be enabled for the IO configured as input. The IO interface has a strong driving capacity, and the current and current can reach 25mA.
    MCP23017 is a high-speed IIC interface. It supports the IIC frequency of 100KHz, 400KHz and 1.7MHz. The chip has 3 address pins, which can be set up for 8 different addresses. So 8 modules can be connected through two IIC buses to achieve up to 128 IO extensions.
    This module is flexible in configuration and strong in driving ability. There are many parallel connections.


No. Parameter Value
1 Operating voltage 3.0V-5.5V
2 Drive chip MCP23017
3 Number of IO 16 (input, output, interruption)
4 Drive power supply 25mA1
5 12C frequency 100KHz, 400KHz, 1.7MHz
6 working temperature -40 Celsius -125  Celsius
7 Chip level Industrial grade
8 Parallel multiple Up to 8
9 Driver 51 and Arduino
10 Module size 65mm*19mm

Pin Description:

No. Pin Function Function
1 VCC Power source input 3.0V-5.5V
2 GND Power negative electrode 0V
3 SCL 12C clock line SCL connecting single chip IO pin or MCU 12C interface
4 SDA 12C data line SDA connecting single chip IO pin or MCU 12C interface
5 RST Chip reduction Low level effective, connecting MCU IO pin or unconnected
6 ITA GPIOA port interrupt output Connect MCU IO pin, without connection when interruption
7 ITB GPIOB port interrupt output Connect MCU IO pin, without connection when interruption

Packing List:

No. Component Quantity Unit
1 STC15W408AS MSP 1 Piece
2 Double row straight pin 2*7 Pin
3 Double row Bending pin 2*7 Pin
4 Single row straight pin 1*20 Pin
5 Single row Bending pin 1*20 Pin

Product Details:


Tested by ICStation's Outstanding Partner arduinoLab:

Learn More Details in the Video:



Rating: [5] 5 of 5 Stars! Date Added: 2018-05-08 06:20:55
The i2c version is a great product! I set these up and had 4 of them running in about 30 minutes using the wiringPi library on the Raspberry Pi. NOTE: If you need to change the i2c address; de-solder the 0 ohm jumper from 0v and re-solder it between VCC and the center pad.

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IIC Input Output Expansion Board MCP23017-E/SS I2C Interface 16Bit 16-Channel I/O Expansion Module Pin Board Converter

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