Comparing 7400 series to the 4000 series logic familes

Discussion in 'Homework Help' started by David Waddell, Jan 27, 2015.

  1. David Waddell

    Thread Starter New Member

    Dec 3, 2014
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    Compare and contrast the 7400 series and 4000 series logic familes with reference to at least 5 characteristics e.g. Working voltage, maximum frequency, threshold voltage for ones and zeros, fan-in, fan-out, power consumption. Include a pin out diagram for the AND logic function on TTL 7400 series and CMOS 4000 series intergrated circuits.

    Any help with this question would be great. Just want to compare notes and make sure I am on the right track.

    Cheers
     
  2. Papabravo

    Expert

    Feb 24, 2006
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    What 5 characteristics do you think might be significant to a designer? Do you have access to representative datasheets?
     
  3. ScottWang

    Moderator

    Aug 23, 2012
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    S/N - signal / noise.
    power consumption - so the CMOS can be using resistors more higher and easy to use more than TTL.
     
  4. David Waddell

    Thread Starter New Member

    Dec 3, 2014
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    Was not given a datasheet, just been reserching online.
    1. Power Consumption
    2. Frequency
    3. Supply
    4. fan in and fan out
    5. Inputs and outputs

    ?
     
  5. Papabravo

    Expert

    Feb 24, 2006
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    Those will do. Now you need to run down a selection guide for each family and some individual datasheets. Finding a manufacturer that makes both families will get you consistent datasheets.
     
  6. WBahn

    Moderator

    Mar 31, 2012
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    Okay, so let's see your notes and we will compare ours to yours and provide some feedback.
     
  7. WBahn

    Moderator

    Mar 31, 2012
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    The first four seem fine. What are you thinking in terms of the points of comparison for "inputs and outputs"?
     
  8. David Waddell

    Thread Starter New Member

    Dec 3, 2014
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    Just get a datasheet for 4000 series and 7400 series?
     
  9. David Waddell

    Thread Starter New Member

    Dec 3, 2014
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    Haven't got that far down the list yet. What would you recommend instead?
     
  10. bertus

    Administrator

    Apr 5, 2008
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    absf likes this.
  11. WBahn

    Moderator

    Mar 31, 2012
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    Oh, comparing inputs and outputs is fine, but it's just too vague. For instance, if you say you want to compare power, it's pretty clear what it is about the devices you are comparing. But what does it mean to compare inputs? Yep, they've both got inputs and outputs. Yep, they both got the same inputs and outputs as far as functionality goes. So you need to decide what is it about the inputs and outputs that you are going to compare.
     
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