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Discussion in 'General Electronics Discussion' started by Niallm, Mar 24, 2016.

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  1. Niallm

    Niallm

    3
    0
    Mar 24, 2016
    Does anyone know what is the pin config for an 8-bit binary full adder if 1110 0011 and 0111 1110 are added together?
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    11,003
    2,503
    Nov 17, 2011
    What do you mean by "pin config"?
    Adding two 8 bit numbers is not specific to the pinout of any chip, it is a general mathematical operation. Please rephrase your question so we can understand it better.
     
  3. Niallm

    Niallm

    3
    0
    Mar 24, 2016
    Pin coniguration in relation to the TTL 74LS283
     
  4. Niallm

    Niallm

    3
    0
    Mar 24, 2016
    The question is as follows Harold:

    SHOW PIN CONFIG FOR AN 8 BIT BINARY FULL ADDER IC use TTL 74LS283 ICS WHEN THE FOLLOWING NUMBERS 1110 0011 AND 0111 1110 ARE ADDED TOGETHER
     
  5. dorke

    dorke

    2,342
    665
    Jun 20, 2015
    Well,
    The 74LS283 is a 4 bit adder.
    You need to connect 2 of them in order to add two 8bit numbers.
    For that you need to feed the carry-out from the 4 LSbits to the carry-in of the 4MSBits .
    Try it yourself, and if needed,come back with what you have.
     
    Last edited: Mar 26, 2016
    davenn likes this.
  6. Anon_LG

    Anon_LG

    453
    117
    Jun 24, 2014
    I suggest you do not shout in order to gain an answer, this is rude and you are warned against it when signing up. Please use quotation marks or italics.

    If this is a one step question and you have been provided with the IC, what is wrong with going to the IC's data sheet and finding the operating example?
     
    Harald Kapp likes this.
  7. CapSteel

    CapSteel

    13
    2
    Mar 7, 2016
    As already mentioned, you can do this with two 74LS283 chips (chip#1 and chip#2)

    Signal, Pin, Chip#
    1, pin A4, Chip#2
    1, pin A3, Chip#2
    1, pin A2, Chip#2
    0, pin A1, Chip#2
    0, pin A4, Chip#1
    0, pin A3, Chip#1
    1, pin A2, Chip#1
    1, pin A1, Chip#1

    0, pin B4, Chip#2
    1, pin B3, Chip#2
    1, pin B2, Chip#2
    1, pin B1, Chip#2
    1, pin B4, Chip#1
    1, pin B3, Chip#1
    1, pin B2, Chip#1
    0, pin B1, Chip#1

    Result
    Pin, Chip#
    C4, Chip#2
    S4, Chip#2
    S3, Chip#2
    S2, Chip#2
    S1, Chip#2
    S4, Chip#1
    S3, Chip#1
    S2, Chip#1
    S1, Chip#1

    Also, must connect pin C4 from Chip#1 to pin C0 of Chip#2 (these are the carry out and carry in pins).
     
  8. hevans1944

    hevans1944 Hop - AC8NS

    4,560
    2,132
    Jun 21, 2012
    Is this homework?
     
  9. davenn

    davenn Moderator

    13,765
    1,920
    Sep 5, 2009
    not sure, lets see where it goes before I consider moving it ;)
     
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