The MAX7319 is an input port switch chip produced by Texas Instruments. The chip supports I2C communication, has 8 input ports and 1 interrupt output port, and can use internal pull-up resistors to detect the level of the input ports. It also provides pull-up resistor selection function, and overvoltage protection function, which can detect whether the input port voltage is too high. When the input port voltage is too high, the chip will automatically turn off to prevent the input port from burning
