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You are here: Home / Topics / Digital electronics

Digital electronics

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Miscellaneous › Others › Digital electronics

  • This topic has 1 reply, 2 voices, and was last updated 13 years, 3 months ago by AJISH ALFRED.
Viewing 2 posts - 1 through 2 (of 2 total)
  • Author
    Posts
  • February 16, 2012 at 6:52 pm #1653
    Rajakumar
    Participant

    What is meant by CMOS compatible input?

     

    many microcontrollers have CMOS compatible inputs what it really means. What is the difference between Ordinary Digital input and Cmos compatible input?

     

    PLEASE answer me.

    April 10, 2012 at 7:42 pm #7411
    AJISH ALFRED
    Participant

    These are two logic levels foud in ICs. TTL and CMOS, both having different voltage ranges for representing logic 0 and logic 1.

    TTL:

    input

    logic 0—-> 0 to 0.8V, logic 1


    > 2 to 5V

    output

    logic 0—-> 0 to 0.5V, logic 1


    > 2.7 to 5V

     

    CMOS:

    input

    logic 0—-> 0 to 1.5V, logic 1


    > 3.5 to 5V

    output

    logic 0—-> 0 to 0.05V, logic 1


    > 4.95 to 5V 

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