4013 problem

Discussion in 'General Electronics Chat' started by Robin Mitchell, Sep 25, 2010.

  1. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
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    Hi,

    I have a 4013 CMOS
    I connect every pin to ground except the outputs and the VCC

    I test the outputs, why is the complimentary output 0 and the normal input 1, reset , set, data and clock are low!
    ARRGGGG!!!

    Also, can you damage CMOS chips by leaving pins floating?
     
    Last edited: Sep 25, 2010
  2. marshallf3

    Well-Known Member

    Jul 26, 2010
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    Set it up in a functioning circuit then it will work.

    Don't leave CMOS pins floating.

    Why don't you read up on CMOS logic chips before you go putting power to them? What's the point?
     
  3. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,751
    760
    Never leave CMOS unused inputs floating and always leave an unused output
     
  4. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
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    199
    I use CMOS often its just that for some reason my 4013's first output is one when it should be 0. Thats all
    I know not to leave pins floating, i was just curious thats all!
     
  5. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,751
    760
    If you are sure then u have faulty device
     
  6. bertus

    Administrator

    Apr 5, 2008
    15,647
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    Hello,

    If you want good advice, post a schematic.
    That way we can see if there is anything wrong.

    You can also read the CMOSIntro PDF (attached).
    It gives you information on input / output levels and loads.

    Bertus
     
  7. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    657
    It sounds normal to me. With all inputs grounded, the output can come up in either state when power is turned on, and will not change until the clock input changes from low to high (with a risetime less than the tRCL spec), or you assert either SET or RESET.
     
  8. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
    732
    199

    ARE YOU SERIOUS!!!!
    This is just perfect! Now i have to make sure that when power is connected, all the 4013 resets are set high! :mad:

    What a silly chup, but THANK GOD its not broken :)
     
  9. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,957
    1,097
    All you have to do is to put simply RC network typical 100K and 100nF.
    See C2 and R5
    [​IMG]

    Almost all chip need proper reset in start-up.
     
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