Why is it that the output of IC 74LS192 is the same as the output in IC 74LS47?

Discussion in 'Digital Circuit Design' started by Edsel Siababa, Sep 10, 2016.

  1. Edsel Siababa

    Thread Starter New Member

    Sep 10, 2016
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    As we demonstrated the count sequence of a 4 bit binary, we connected the IC 74LS47 as the main ckt then we got the output. Afterwards we added to connect the IC 74LS192 in the main ckt. We monitored the count sequence on d logic indicator..and d output we got is the same as the 1st ckt. How is the explanation of this?
     
  2. Sinus23

    Member

    Sep 7, 2013
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    It is quite simple. You accidentally posted in off topic when it should be in general electrics chat;) But do not worry. It will get sorted:cool:

    But on another note. At least, I am going to need to see a schematic of this....
     
  3. Edsel Siababa

    Thread Starter New Member

    Sep 10, 2016
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    Ah sorry for that..im just new here..
    Btw here it is.
     
  4. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    Did you read the data sheet on each chip?
     
  5. Edsel Siababa

    Thread Starter New Member

    Sep 10, 2016
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    No..I haven't read yet..
     
  6. SLK001

    Well-Known Member

    Nov 29, 2011
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    Well, once you have read the datasheets, you will find that there is something different between the two, like open-collector outputs, more enable lines, inverting vs non-inverting, or something like that.
     
  7. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    I think the title of the thread is incorrect. The lab has the TS using the 74LS192, 74LS193, and a 74LS47.

    I'd like to see the whole objective given to the TS. I think this is homework.
     
    Last edited: Sep 11, 2016
  8. Mark Hughes

    Member

    Jun 14, 2016
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    The 7447 takes 4-inputs (binary) and lights the appropriate segments of the 7-segment display.
    0000 causes "0" to appear
    0001 causes "1" to appear
    0010 causes "2" to appear, etc...

    The 74192 is a counter IC that can count up or count down with a single input. Additionally, it has 4-inputs that pass-through to 4-outputs. If I read your post correctly, you've used the pass-through pins. However, instead of using 4 pins as input, you can also use a single pin. With every button press, you can increment the numbers, and with a different button press, you can decrement the numbers.

    0000, 0001, 0010, still work as inputs. But the chip can also take a single button press and sequentially convert it to display 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

    These are all logic level ICs and you're new to this, so don't worry about the letters in between the numbers. Just google the numbers 74192 and 7447.
     
    Edsel Siababa likes this.
  9. Edsel Siababa

    Thread Starter New Member

    Sep 10, 2016
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    Thank you so much sir. I really appreciate you.
    I got now the idea.:)
     
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