7Semi Bidirectional Voltage Level Translator Breakout PCA9306 I2C

The 7Semi Bidirectional Voltage Level Translator Breakout PCA9306 is a compact and reliable logic level conversion module designed to enable seamless communication between devices operating at different voltage levels. Based on the Texas Instruments PCA9306 dual-channel bidirectional voltage-level translator, this breakout board allows safe interfacing between 1.2V, 1.8V, 2.5V, 3.3V, and 5V logic systems without requiring complex circuitry or direction control signals.

The PCA9306 utilizes a low ON-resistance pass transistor architecture that automatically handles bidirectional data transfer, making it ideal for I²C, SMBus, PMBus, MDIO, and other open-drain communication interfaces. Its transparent operation ensures reliable signal integrity while reducing design complexity in mixed-voltage systems.

This module is widely used in Arduino, ESP32, ESP8266, STM32, Raspberry Pi, industrial controllers, sensor networks, robotics, IoT devices, battery-powered electronics, and embedded systems where different logic voltage domains must communicate safely and efficiently. Its compact footprint and low-power operation make it an excellent choice for both prototyping and production applications.

Features

• Based on Texas Instruments PCA9306 voltage level translator IC
• Dual-channel bidirectional voltage translation
• Supports logic level conversion between 1.2V, 1.8V, 2.5V, 3.3V, and 5V systems
• Automatic bidirectional signal translation
• No direction control pin required
• Optimized for I²C communication buses
• Compatible with SMBus, PMBus, and MDIO interfaces
• Low ON-resistance MOSFET architecture
• Maintains signal integrity across voltage domains
• Supports mixed-voltage embedded systems
• Low power consumption design
• Compact PCB footprint for space-constrained applications
• Easy integration with development boards and sensors
• Suitable for industrial and commercial applications
• Reliable operation across a wide voltage range

• Datasheet
• 7Semi PCA9306 Voltage Level Translator Breakout 3D STEP file