32bit Level shiftter 3.3v to 5v

Discussion in 'Homework Help' started by tks999, Jan 10, 2013.

  1. tks999

    Thread Starter New Member

    Jan 10, 2013
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    Hello guys i have to design 32bit bidirectional level shiftter from 3.3v to 5v
    input levels : CMOS.
    output levels: CMOS.
    Can you help my with some of this questions:
    1. Which IC i have to use?
    2. How exactly to do 32 bit?
    3. What is neccery to connect for check is my scheme working?

    Thanks!
     
  2. WBahn

    Moderator

    Mar 31, 2012
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    Please post your attempt to work the problem. After all, it is YOUR homework problem. This is the Homework Help forum, not the Homework Done For You forum. So post your best attempt and we will help guide you from there toward a solution, but you will need to do most of the work -- which seems only fair since you will be receiving all the credit.
     
  3. tks999

    Thread Starter New Member

    Jan 10, 2013
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    The problem is that i don't know the method to do it.
    I know i have to choose IC but i don't know which will be correct.
    I know that when i choose IC , probbaly will be 8bit and i have to take 4 of this IC. I have to do it , but i don't know how to work with IC.
    I don't want anyone to do my work, i just need advices how to start it!
    Thanks and sorry if my post looks like i'm lazy or something.
     
  4. t06afre

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  5. WBahn

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    Well, a failry obvious place to start is doing a Google search for, say, "level shifter". If you explore the first few links that come up, I bet you will either be able to answer your question yourself or at least get a much beffer feel for what the lay of the landscape is so that you can make a decent attempt and be able to ask much more detailed questions.
     
  6. WBahn

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    Mar 31, 2012
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    One problem you might have is finding stuff that is 5V compliant. A lot of that stuff has been discontinued.

    What speed are you trying to run these signals at? If it is slow enough, one option is to do it resistively.
     
  7. Ron H

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    If you search for "3.3v to 5v level shifter ic", you get several relevant hits.
    I guess it's just too obvious.
     
  8. t06afre

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    Com on folks. Give this new member some slack
     
  9. Ron H

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    Yeah, I guess I was a little harsh. Apparently searching skills come with experience, just like everything else. I doubt they teach it in school.
     
  10. tks999

    Thread Starter New Member

    Jan 10, 2013
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    Thanks guys for your help. You really help me a lot and i appreciate it. I chose 74FCT164245T The only thing i need to know how to connect 2 of this to make it 32bit.
     
  11. Ron H

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    This table shows how to use it.
     
  12. tks999

    Thread Starter New Member

    Jan 10, 2013
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    This is what i've done sor far
    How it looks like?

    [​IMG]
     
    Last edited by a moderator: Jan 13, 2013
  13. Ron H

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    That looks right.
     
  14. tks999

    Thread Starter New Member

    Jan 10, 2013
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    Can anybody help me with the block diagram, i think i wii have
    Power Supply block, filter,5v fix regulator, 3,3v regulator, and the siffter.
     
  15. Ron H

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    Draw it and post it, and then we can comment. As usual, you need to take your work as far as you can before asking for help. That's why it's called Homework Help, not *Homework Done For You©.

    *Copyright WBahn 2012
     
    Last edited: Jan 17, 2013
  16. tks999

    Thread Starter New Member

    Jan 10, 2013
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    Thank you guys. I completly finish my homework and almost everything was perfect.
    Now i know a bit more about
    1.How to use IC's
    2.Preteus software
    3.What is trasnlator and the different types translators.
    Thakns, again!
     
  17. WBahn

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    I just KNEW I should have copyrighted that phrase! :D Of course, then I would have merely found out that some fifteen people had long since beaten me to it! :p
     
  18. WBahn

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    Good. That's the whole goal of homework in general and this forum in particular -- and that's why we try to only help around the edges and make the student do the heavy lifting.
     
  19. Ron H

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    I edited post #15 to give you credit.:D
     
  20. WBahn

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    Oh god! I can't imagine how many posts I should probably edit to give credit to similar things! :p I sure hope you haven't just set a precedent against which the rest of us are judged! :D
     
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