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THVD2450: Supply voltage vs IO voltage requirements

Tyler Holmvik
Intellectual 931 points
Part Number: THVD2450

Hi E2E team, 

For THVD2450, can I use a 5V supply with 3.3V to control R, D, and RE/DE? Outputs A and B will be 5V. I want to make sure this doesn't cause any issues such as internal forward biasing. 

Tyler

  • 0
    TI__Guru 52462 points

    Hi Tyler,

    This device has a VIH(min) of 2V and a VIL(max) of 0.8V. Using 3.3V input signals on "D", DE, and /RE shouldn't be an issue with a 5V supply.

    The one concern is that the "R" pin will output ~device VCC - so if the controller is at 3.3V a level translator from "R" output to Controller input will need to be implemented (5V to 3.3V translator).

    Please let know if there are any other questions that  I can help you out with!

    Best,

    Parker Dodson