I2C Bi-Directional Logic Level Converter- 2 Channel
Review: 5 - "A masterpiece of literature" by John Doe, written onMay 4, 20020
IIC I2C Logic Level Converter Bi-Directional Module 5V to 3.3V
IIC I2C 4-Channel
KeeYees 10pcs 4 Channels

I2C Bi-Directional Logic Level Converter- 2 Channel

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  • Product SKU: KG098
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The "I2C Bi-Directional Logic Level Converter - 2 Channel" is a device designed to convert voltage levels in I2C communication setups between two devices operating at different logic levels.

Here's an overview:

Description: This logic level converter is a small device that safely steps down 5V signals to 3.3V and steps up 3.3V to 5V at the same time, allowing for bidirectional communication between devices operating at these two voltage levels.

Functionality: It allows for data transmission between devices that operate on different voltage levels by converting the voltage level of the data signal without altering the data itself.


Bi-Directional: Capable of converting signals in both directions, from 5V to 3.3V and 3.3V to 5V.

2 Channels: The device typically provides two channels, meaning it can handle two separate communication lines simultaneously.

I2C Compatible: Designed specifically to work with I2C communication, ensuring proper synchronization and timing.

Small Form Factor: These converters are usually compact, making them suitable for embedded systems and projects with limited space.

Pull-Up Resistors: Often incorporates pull-up resistors for reliable operation.


Interfacing Between Devices: Useful when interfacing 5V devices with 3.3V devices, common when connecting older 5V sensors to newer 3.3V microcontrollers.

Prototyping: Used in prototyping environments where devices with varying voltage levels need to communicate.

Embedded Systems: Incorporated into embedded systems where a mix of 5V and 3.3V devices coexist.

Using the I2C Bi-Directional Logic Level Converter:

Powering: Connect the high voltage (5V) to the HV pin, and the low voltage (3.3V) to the LV pin.

Ground: Connect the ground of both systems to the converter's ground.

Data Lines: Connect the 5V data line to the HV side of a channel and the 3.3V data line to the LV side of the same channel. Repeat for the second channel if necessary.

Enable Pull-Up: If the converter supports enabling pull-up resistors, make sure they're enabled for proper operation.


Data Rate: Ensure the converter supports the data rate at which your I2C devices are communicating.

Voltage Levels: Always ensure that you're connecting the correct voltage levels to the respective HV and LV sides to avoid damage.

Interference: Position the converter as close as possible to the devices it's interfacing to minimize interference and signal degradation.

When using the I2C Bi-Directional Logic Level Converter - 2 Channel, understanding its functionality, connections, voltage considerations, and channel operations is crucial for safe and effective voltage level conversion in I2C communications.

Physical Attributes

  • Length * Width * Height  (mm) : 15 * 10 * 2.5 mm
  • Weight (gm): 2

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    Package Includes

    • 1 x I2C Bi-Directional Logic Level Converter- 2 Channel

    Customer Reviews

    Based on 22 reviews
    laxmi narayan
    Works as expected

    I needed a 5v to 3.3v level converter for I2C and UART communication.This product worked as expected in both directions.There is a silkscreen on the back with the pinout on it.

    Works great

    Does the job.

    mushir ahmed
    Perfect to avoid Data Drops on long cables

    Work as expected, connected Data From NODEMCU to The device and the Output to LED Strip and worked OK.

    sachin kumar
    Very nice bi-directional Logic Level Converters.

    Very nice bi-directional Logic Level Converters. All worked as advertised.

    John De Vone
    great price

    I use these all the time, need to order some more

    Nice price. Works great for low speed IO applications

    I prefer the pinout of these to other models. Nice price. Works great for low speed IO applications.

    charan jeet singh
    Five Stars

    Nice little 4-channel level shifting boards. Silk screen on back indicates all connections. Simple.

    aamir hussain
    These work!

    I don't know what thickness and sheerness have to do with level shifting, but that's me. I bought these to drive LEDs from a 3.3 volt micro GPIO and they work very well. The LEDs are driven from 5 volts, so their 3.1 volt threshold @25 ma. is handled.

    Tim R.

    Use with RPI to shift 3.3 to 5V to run data line of ws2812b LEDs. Works great.

    Good level converters

    Works as they are supposed to