Feature: Provide two-way communication capability VCCA side support voltage: 1.2V-3.6V VCCB side support voltage: 1.65V-5.5V Can provide 3.3-5V, 1.8-3.3v and other common level conversion capability Main applications: 5V and 3.3V MCU module 3.3V and 5V MCU module Compatible and other communications support MCU and SD card communication level conversion SCM and iic, spi serial device level converter OE active high enable IO recommended by a low voltage side of the IO port Package included: 4 * TXS0108E High Speed Full Duplex 8 Channel Logic Level Bi-directional Converter Module