7Semi Bidirectional Voltage Level Translator Breakout PCA9306 I2C

The 7Semi Bidirectional Voltage Level Translator Breakout PCA9306 I2C is a compact and efficient module designed to safely interface devices operating at different logic levels. Based on the PCA9306 dual bidirectional voltage-level translator IC, it allows I²C and other open-drain signal lines to communicate between two voltage domains. The module supports automatic bidirectional translation without requiring a direction control pin, making it ideal for connecting 1.2V, 1.8V, 2.5V, 3.3V, and 5V devices in mixed-voltage systems.

Technical Specifications:

• IC: PCA9306 Dual Bidirectional Voltage-Level Translator
  
• Interface Type: I²C and SMBus compatible
  
• Channels: 2 (SDA and SCL)
  
• Logic Compatibility: Supports 1.2V to 5V on both sides
  
• Supply Voltage (VREF1): 1.0V to 3.6V (lower voltage side)
  
• Supply Voltage (VREF2): 1.8V to 5.5V (higher voltage side)
  
• Communication Speed: Up to 400kHz (Standard/Fast I²C mode)
  
• Direction Control: Automatic (bidirectional, no control pin needed)
  
• Pull-up Resistors: Onboard pull-ups for stable operation
  
• Current Drive Capability: Up to 20mA per channel
  
• Operating Temperature: -40°C to +85°C
  
• Board Type: Compact breakout with 2.54mm pitch header pins
  
• Power Indicator: Onboard LED for power status
  

Features:

• Enables safe bidirectional communication between devices with different voltage levels
  
• Fully compatible with I²C and SMBus protocols
  
• Supports wide voltage translation range from 1.2V to 5V
  
• Automatic direction sensing—no control pin required
  
• Compact breakout board with clearly labeled pins
  
• Ideal for interfacing 3.3V microcontrollers with 5V peripherals
  
• Integrated pull-up resistors for reliable signal integrity
  
• Low power consumption and high signal integrity
  
• Compatible with Arduino, ESP32, STM32, and Raspberry Pi
  
• Plug-and-play design simplifies mixed-voltage system development

Applications:

• I²C bus voltage level shifting between 3.3V and 5V systems
  
• Communication between modern low-voltage sensors and older 5V controllers
  
• Embedded system and IoT hardware interfacing
  
• Microcontroller and peripheral device integration
  
• Robotics and automation systems requiring mixed-voltage logic
  
• Prototyping and development boards
  
• Consumer and industrial electronic devices
  
• Safe signal translation in data communication lines
  
• Mixed-voltage testing and debugging setups
  
• Educational and research electronics projects