Module using chip: TXS0108E High-speed full-duplex 8-channel level conversion module Provide two-way communication capabilities VCCA terminal support voltage: 1.2V-3.6V VCCB terminal support voltage: 1.65v-5.5v Common level shifting capabilities such as 3.3-5V, 1.8-3.3v, etc. Main applications, 5V microcontroller and 3.3V module, 3.3V microcontroller and 5V module, etc. Level conversion of single chip and SD card communication MCU and iic, spi serial device level shifting OE enable IO is active high, it is recommended to connect IO port on low voltage side