Provide two-way communication capabilities.
Provide 3.3-5V, 1.8-3.3v and other common level conversion capability.
Serial communication interface compatible with UART/IIC/SPI port easy to connect.
Widely used in the MCU and SD card, MCU and serial devices,MCU and 5V/3V module communiction.
OE active high enable IO recommended by a low voltage side of the IO port.