3Pcs PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Modu
PCF8574 IO expansion chip with I2C interface, 8-bit parallel port output. Based on the I2C interface I / O expansion modules, using two I / O can be extended to eight I / O (up to simultaneous use 8 PCF8574, expanded to 64 I / O).