Features: Expand your microcontroller's capabilities with the MCP23017 16 bit I/O Expander featuring I2C interfaces and optimized power consumption e. Offering seamless integration with various development boards for efficient GPIO port expansion reliabled performances. This PCB based module combines robust I2C communication with low power circuitry design, delivering stable transmission and module installation flexibility for streamlined hardware configurations. Essential for embedded engineers, robotics developers, and educators requiring enhanced input/output channels in prototyping and industrial automation projects. Optimize smart home controllers, sensoring arrays by adding multiple connection through cascadable GPIO expansion up to 128 ports. Specifications: Working voltages: 3V-5.5V Driver chip: MCP23017 Number of I/O port: 16 Driver power supply: 25mA1 Frequency: 100KHz, 400KHz, 1..7MHz Chip grade: industrial grade Parallel multiples: up to 8 Driver: 51 and Module size:about 65x19mm/.2.57x0.76in Package Includes: 1/2Set MCP23017 Expansion board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.