Logic Level Converter Bi-Directional Module 5V to 3.3V

The Logic Level Converter 4-Ch Bi-Directional Module allows you to connect 3.3V and 5V logic circuits together.

This module is typically used to connect 3.3V and 5V logic signals together, but it is compatible with many different logic voltages including 1.8V and 2.8V as found in some of the newer devices. It will also work with most oddball voltages if you have some special conversion requirement

There are 4 bi-directional channels which is especially useful for buses such as I2C that pass data in both directions. It can also be used for unidirectional signals like TTL serial communications as well as standard logic signals.

The circuit makes clever use of N-Channel MOSFET transistors and some pull-up resistors to take care of the voltage translation.

The board has the following I/O connections:

• HV = High voltage.  Must be higher voltage than LV.  Typically tied to 5V
• LV = Low voltage.  Must be lower voltage than HV.  Typically tied to 3.3V
• GND = Ground (x2).  Can be used to pass a ground between the two different voltage circuits
• HV1 / LV1  =  Channel 1
• HV2 / LV2  = Channel 2
• HV3 / LV3  = Channel 3
• HV4 / LV4  = Channel 4

Features :

• 4 channels can convert up to 4 logic signals
• Can convert between 1.8V, 2.8V, 3.3V and 5V logic circuits
• Bi-directional so can work with bi-directional buses such as I2C
• Utilizes N-Ch MOSFET transistors for level translation