I2C Bi-Directional Logic Level Converter – 2 Channels

Wiring Connections:

• HV (High Voltage) Pin:
  • Connect to the high voltage supply (e.g., 3.3V or 5V) corresponding to the voltage level of the device you are interfacing with.
• LV (Low Voltage) Pin:
  • Connect to the low voltage supply (e.g., 1.8V, 2.5V, 3.3V) of the microcontroller or device requiring a lower logic level.
• A1 and B1 Pins (Channel 1):
  • A1: Connect to the high voltage side of the I2C data or clock line.
  • B1: Connect to the low voltage side of the I2C data or clock line.
• A2 and B2 Pins (Channel 2):
  • A2: Connect to the high voltage side of the second I2C data or clock line.
  • B2: Connect to the low voltage side of the second I2C data or clock line.
• GND Pins:
  • Connect to the ground of both the high voltage and low voltage systems to ensure proper operation.

Power:

• Operating Voltage:
  • High Voltage (HV): 3.3V to 5V DC
  • Low Voltage (LV): 1.8V to 3.3V DC
• Power Consumption: Minimal, typically under 1 mA for each channel.

Input and Output:

• Input:
  • High Voltage Side: Accepts signals from devices operating at higher logic levels.
  • Low Voltage Side: Accepts signals from devices operating at lower logic levels.
• Output:
  • High Voltage Side: Outputs level-shifted signals compatible with higher voltage logic.
  • Low Voltage Side: Outputs level-shifted signals compatible with lower voltage logic.

Physical Characteristics:

• Size: Compact module, generally around 2 x 1.5 cm.
• Mounting: Designed for easy integration into breadboards or embedded in projects with simple solder connections.
• Material: Typically constructed with a printed circuit board (PCB) and surface-mounted components.

Technical Specifications:

• Signal Types: Supports I2C data (SDA) and clock (SCL) lines.
• Voltage Conversion: Efficiently handles voltage level conversion for I2C signals.
• Speed: Suitable for standard I2C bus speeds up to 400 kHz.
• Accuracy: Provides reliable signal conversion without significant signal degradation.

Additional Features:

• Compatibility: Works with a wide range of microcontrollers and I2C devices operating at different voltage levels.
• No External Components Required: The module typically does not require additional components for basic operation.
• Signal Integrity: Maintains signal integrity during level shifting, ensuring accurate communication.

How to Use:

• Connect the Power Supplies:
  • HV: Connect to the high voltage supply (e.g., 5V).
  • LV: Connect to the low voltage supply (e.g., 3.3V).
• Connect the I2C Lines:
  • Channel 1: Connect the high voltage I2C data (SDA) line to A1 and the low voltage I2C data line to B1.
  • Channel 2: Connect the high voltage I2C clock (SCL) line to A2 and the low voltage I2C clock line to B2.
• Connect Grounds:
  • Ensure that the GND pins of the high voltage and low voltage systems are connected to each other.
• Verify Connections:
  • Double-check all connections to ensure they are correctly and securely connected.
• Test Communication:
  • Power up your system and test the I2C communication to verify that signals are properly shifted between the high and low voltage devices.

The I2C Bi-Directional Logic Level Converter – 2 Channels is an essential tool for interfacing different logic level devices in I2C communication systems. Its bidirectional capability and simple integration make it ideal for various applications where voltage level differences need to be managed.