16-bit I2C GPIO Expander - MCP23017

16 way I/O extension module of the 12C interface, adopts MCP23017 chip of MicroChip. 

Each IO can be discretionarily configured as input or output, and can set pull up resistort.

The IO configured as input can start interrupt function. The IO interface has a strong driving capacity, and the sink current and pull 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 set up to 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.

Specification:

Operating voltage: 3.0V-5.5V

Drive chip: MCP23017

Number of IO: 16 (input, output, interruption)

Drive power supply: 25mAh

12C frequency: 100KHz, 400KHz, 1.7MHz

Working temperature: -40℃ to 125℃

Chip level: Industrial grade

Parallel multiple: Up to 8

Drive Program: 51 and  

Size: Approx. 65mm x 19mm

Pinout Configuration

VCC: Power source input, 3.0V-5.5V

GND: Power negative , 0V

SCL: 12C clock line, SCL of connecting MCU IO pin or MCU 12C interface

SDA: 12C data line, SDA of connecting MCU IO pin or MCU 12C interface

RST: Chip restoration, Low level effective, connecting MCU IO pin or unconnected

ITA: GPIOA port interrupt output, Connect MCU IO pin, without connection when interruption

ITB: GPIOB port interrupt output, Connect MCU IO pin, without connection when interruption