❤️The main resources: PCF8574, I2C interface, the 8-bit parallel
❤️Typical applications: for I / O resource constraints the MCU I / O expansion
❤️PCB Size: 37.5mm x 16.7mm
❤️The I/O expansion module based on I2C interface can expand 8 I/Os by using 2 I/Os. Support cascading, up to 8 modules can be used at the same time, expanding to 64 I/Os.