8-channel bidirectional 3.3V-5V level shifter board - Purpose and benefits: enables reliable, safe communication between 5V microcontrollers and 3.3V devices, and supports level conversion between MCU and SD cards, I2C, SPI peripherals, or other serial interfaces. simplifies mixed-voltage prototyping and development. - Channel count and direction: 8 bidirectional translation channels between high voltage (VB) and low voltage (VA) domains, suitable for multiple GPIO, I2C, SPI, and UART signals. - Electrical specifications: VA side voltage range 1.2V–3.6V; VB side voltage range 1.65V–5.5V. 3.3V signals connect to VA; 5V signals connect to VB. OE is active high and controlled from the low-voltage side to enable translation. - Interface and operation: high-speed shifter designed to work when tied to 3.3V logic; straightforward level translation with a simple, easy-to-use interface. - Compatibility: supports common 3.3V and 5V logic families across I2C, SPI, UART, and general GPIO lines; suitable for MCU projects, development boards, and peripheral modules like SD cards. - Size and build: compact 8-channel board that integrates cleanly with breadboards and PCBs for rapid testing and deployment. - Use scenarios: 1) A 5V microcontroller communicating with 3.3V sensors or modules. 2) A 3.3V MCU interfacing with a 5V SD card module or 5V SPI/I2C peripherals. 3) Rapid prototyping of mixed-voltage systems in development boards and educational kits. - Operating notes: ensure OE is driven high on the low-voltage side to enable all channels; supply VA and VB within their specified ranges for proper translation.