I got this logic level converter to be able to use my lcd but I can't figure out how to get it to work, the problem is that the current is not passing through. This is the model: TXS0108E

enter image description here

Any help is appreciated.


A few Combinations that I have tried:

enter image description here

enter image description here

And I tried to swap the voltages, same wiring as in the pictures but 3.3v instead of 5v and vice versa.

  • Could you tell what you tried? Did you pull the OE pin HIGH?
    – Gerben
    Jan 14, 2018 at 16:35
  • @Gerben okay, i will add a few photos with what i have tried
    – xM0nSt3r
    Jan 14, 2018 at 16:37
  • @Gerben I made the edit
    – xM0nSt3r
    Jan 14, 2018 at 16:44
  • Assuming your lines saying "3.3V" are connecting to a 3.3V power supply, your first picture is correct. VA => 3.3V, OE => 3.3V, VB => 5V and GND => GND.
    – Majenko
    Jan 14, 2018 at 16:49
  • 2
    Where is the 3.3V coming from?
    – Majenko
    Jan 14, 2018 at 16:50

1 Answer 1


The TSX0108 doesn't magically provide you with a regulated voltage. You have to provide the voltage, the TSX0108 merely switches it.

As you can see from the datasheet, the basic wiring is:

enter image description here

In the circuit above the 1.8V connection is your 3.3V connection, and the 3.3V is your 5V connection.

You must provide both the 3.3V and 5V power sources.

  • and how do i provide 3.3 v from an lcd?
    – xM0nSt3r
    Jan 14, 2018 at 16:53
  • By connecting it to a 3.3V power source - such as the 3.3V pin of the Arduino.
    – Majenko
    Jan 14, 2018 at 16:54
  • so i provide 3.3v and 5v from the arduino, and then that regulates the data pins voltage?
    – xM0nSt3r
    Jan 14, 2018 at 16:55
  • 1
    Crudely speaking, yes. It's just a set of switches. A signal coming in through an A pin switches the voltage provided at B to the matching B pin. A signal coming in through a B pin switches the voltage provided at A to the matching A pin.
    – Majenko
    Jan 14, 2018 at 16:56

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