TXS0108E Level Conversion Module

The TXS0108E Level Conversion Module is an 8-channel bi-directional logic level shifter designed to solve voltage incompatibility issues between digital devices operating at different logic levels. It enables seamless communication between components running at 1.8V, 2.5V, 3.3V, and 5V . The module is built around the TXS0108E integrated circuit from Texas Instruments, which provides automatic direction sensing – no direction control pin is required. This makes it ideal for bidirectional communication protocols such as I2C, SPI, UART, and parallel data buses . The module features fast signal transmission with minimal propagation delay, preserving signal integrity even at higher data rates (up to 24 Mbps in push-pull mode). The compact PCB includes clearly labeled pins for VCCA (low voltage side) , VCCB (high voltage side) , 8 signal channels (A1-A8, B1-B8) , and GND . Built-in 10k? pull-up resistors simplify I2C use. This module is essential for embedded systems, IoT projects, robotics, and any application where 3.3V microcontrollers need to interface with 5V sensors, displays, or peripherals. Specifications Parameter Value IC used TXS0108E (Texas Instruments) Number of channels 8 (bi-directional) Low voltage side (VCCA) 1.8V to 3.6V High voltage side (VCCB) 2.5V to 5.5V Input/Output logic levels 1.8V, 2.5V, 3.3V, 5V Direction control Automatic (no direction pin) Maximum data rate 24 Mbps (push-pull) / 2 Mbps (open-drain) Propagation delay < 10 ns (typical) Supported protocols I2C, SPI, UART, GPIO, parallel bus Built-in pull-up resistors 10k? on both sides (optional enable/disable) Operating temperature -40°C to +85°C PCB dimensions Approx. 25mm × 18mm (varies by manufacturer) Pin header pitch 2.54mm (compatible with breadboards) Applications Interfacing microcontrollers with different voltage logic levels – Connect 3.3V Arduino/ESP32 to 5V sensors or displays Connecting 3.3V devices to 5V systems (or vice versa) – Bi-directional translation without level mismatch I2C, SPI, and UART communication in mixed-voltage environments – Ensure reliable data transfer between devices Embedded system designs where voltage compatibility is required – Simplify PCB design by using level shifting IoT devices and wearables with different voltage standards – Interface low-power 1.8V sensors with 3.3V processors Signal level conversion in sensor and actuator networks – Connect 5V industrial sensors to 3.3V logic controllers Multivoltage prototyping – Breadboard projects combining components from different voltage families SD card and memory interface – Translate between 3.3V microcontrollers and 5V legacy memory chips