8-channel bidirectional logic level converter board for 3.3V/5V systems Key features - Voltage ranges: VCCA 1.2V–3.6V; VCCB 1.65V–5.5V - Bidirectional signal transfer on 8 channels between 3.3V side (VA) and 5V side (VB) - 3.3V side signals connect to VA; 5V side signals connect to VB - OE input is active high and recommended to be driven from the low-voltage side to enable operation - High speed operation with straightforward use; tie the low-voltage side to 3.3V to enable - Provides a serial interface and is easy to use Applications - Interface between 5V microcontrollers and 3.3V devices - Level shifting between MCU and SD cards - I2C and SPI connections between 3.3V and 5V devices Use scenarios - A 5V MCU communicating with a 3.3V peripheral such as sensors or displays - A 3.3V MCU communicating with 5V peripherals in I2C or SPI buses - Bridging between a microcontroller and an SD card or other serial devices requiring voltage translation Why it helps - Enables reliable communication across voltage domains without extra drivers - Simple 8-channel solution with clear VCCA/VCCB ranges and enable control - Directly supports common 3.3V and 5V ecosystem wiring with minimal setup