74LS90 act like 4017 counter

Discussion in 'General Electronics Chat' started by laguna92651, Sep 5, 2011.

  1. laguna92651

    Thread Starter Active Member

    Mar 29, 2008
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    How can I configure a 74Ls90 to act like a 4017 decade counter. I don't want BCD out want one single pulse per clock, I only need to count to 4.
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Why don't you look at a datasheet for a 4017?
    Then you will see just what is inside of one.

    http://www.national.com/ds/CD/CD4017BC.pdf
    See page 6.

    Consider using some D-type flip-flops with other supporting gates.
     
  3. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,535
    A 7490 is a BCD counter, it counts 0-9 in binary.

    A 4017 has 10 outputs, that count sequentially, 1 pin per number.

    They are not very similar.
     
  4. KJ6EAD

    Senior Member

    Apr 30, 2011
    1,425
    363
    Last edited: Sep 6, 2011
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