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4 input XOR gate

Discussion in 'Datasheets, Manuals or Parts' started by fingers, May 23, 2006.

  1. fingers

    fingers New Member

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    Hi,

    Can anyone tell me a part number for a four input XOR gate - I can't find one. eg 74HC..
     
  2. dknguyen

    dknguyen Well-Known Member

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    ONLINE
    Site

    Do a search on the Maxim or Texas Instrument website
     
  3. hotwaterwizard

    hotwaterwizard Active Member

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    Wow hard one. You may have to make it.
    Here are my search results

    four input XOR gate
    four input exclusive or
    4-input XOR gate
    4-input exclusive or
    xor4
    http://asic.austriamicrosystems.com/databooks/c35/databook_c35_33/XOR40.html
    http://asic.austriamicrosystems.com/databooks/c35/databook_c35_33/XOR41.html

    http://www.sfe-dcs.com/Digital/4I_4O_EOR.html
    http://www.sfe-dcs.com/Images/Digital/4i_4o_eor.pdf

    http://www.altium.com/files/learningguides/.\CR0118 FPGA Generic Library Guide.pdf

    1134H 4-Input Exclusive-OR-Function Logic Gate General Micro-electronics Inc
    http://www.americanmicrosemi.com/catalog/1134H.html

    2134H 4-Input Exclusive-OR-Function Logic Gate General Micro-electronics Inc

    PAL20X10a Programable Logic IC
    http://www.tranzistoare.ro/datasheets2/12/1205394_1.pdf


    http://asic.austriamicrosystems.com/databooks/c35/databook_c35_33/XOR41.html
    XOR41 is a 4-input EXCLUSIVE-OR (XOR) gate with 1x drive strength
     
    Last edited: May 25, 2006
  4. dave

    Dave New Member

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  5. hotwaterwizard

    hotwaterwizard Active Member

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    Here is how you make one.
     

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  6. FoulBreeze

    FoulBreeze New Member

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    Another way 4-input XOR

    1 - sn7486, 2 - sn7410's, & 1 - sn7408.
    You'll have 1-XOR gate and 2-AND gates leftover; but hey, they're cheap!
    Decimals: 7 (0111), 11 (1011), 13 (1101), & 14 (1110) are problematic-with cascaded 2-input XORs; and therefore requires the extra logic.
     

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  7. Leftyretro

    Leftyretro New Member

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    I don't believe there is such a thing as a 4 input XOR function. An XOR function is by definition a 2 bit operation and while it can be performed on multibit variables (bytes, words, etc) it is still a bit by bit operation and any o 4 input bit gate function (with one bit output) will be some logic function other then a true XOR function ?

    Lefty
     
  8. FoulBreeze

    FoulBreeze New Member

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    True, it is, that XORs are two-bit operations, as in adders. Odd numbers of HI's in combination with a LO, in a cascaded XOR config, are always HI; and mathematically sound. I needed merely a circuit that wouldn't allow more than One of Four inputs to be HI, at a time--for Analog Multiplexer Addressing, and Idiot Proofing of illegal address modes. Not sure if that also is the configuration that "fingers" needed OR NOT.
     
  9. trunglqvtv

    trunglqvtv New Member

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    Hi, I want to Design, lay out, and simulate a CMOS four-input XOR gate in the standard
    0.25 micron CMOS process. You can choose any logic circuit
    style, and you are free to choose how many stages of logic to use: you
    could use one large logic gate or a combination of smaller logic gates.
    The supply voltage is set at 2.5 V! Your circuit must drive an external
    20 fF load in addition to whatever internal parasitics are present in your
    circuit.
    The primary design objective is to minimize the propagation delay
    of the worst-case transition for your circuit. The secondary objective is
    to minimize the area of the layout. At the very worst, your design must
    have a propagation delay of no more than 0.5 ns and occupy an area of
    no more than 500 square microns, but the faster and smaller your circuit,
    the better. Be aware that, when using dynamic logic, the precharge time
    should be made part of the delay.
    The design will be graded on the magnitude of A ยด tp
    2, the product
    of the area of your design and the square of the delay for the worst-case
    transition.
    help me
     
  10. shokjok

    shokjok Member

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    What are your circuit parameters - voltage, speed, temperature and function?
     

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