Logic Gate Circuits | Binary Logic Gates | RS
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    Logic Gates

    Logic gates are physical components in a circuit that control the flow of a signal by implementing a Boolean function, processing a signal to binary information. Logic gates are foundational in logic circuits, or in any electronic circuit process that involves digital to analogue signal conversion, or the flow of digital information. Logic gates are primarily implemented using diodes or transistors as electrical switches, but can also be constructed using electromagnetic relays (relay logic), vacuum tubes, optics, molecules, fluidic logic, pneumatic logic, or even mechanical elements.

    Types of Logic Gate

    Logic gates have distinct logic functions. The most common of these are known as basic gates. These include:

    • AND Gates - these gates have multiple inputs that are processed into a single signal output depending on the positive combination of high signals in the inputs. It will only produce a high signal if both inputs register as high (e.g. two ones will result in a one, otherwise, it will have an output of zero).
    • OR Gates - similar to the AND gate, an OR gate has multiple inputs and a single output. In this case, it does not require a positive combination of one signals but will implement logical produce a high signal if one or all of the inputs are high. (e.g a one and a zero, or two ones, may produce a high signal, but two zeros will produce zeros.)
    • NOT Gates -also known as inverters, the NOT gates will process the signal as the opposite of its value (eg. a one will invert as a zero, and a zero will invert as a 1.)

    There are also combined function logic gates that modify typical functions with an inversion.

    • NAND Gate - unlike an AND gate, NAND will process two high signals as a zero and all other combinations as a one.
    • NOR Gate - unlike an OR gate, this will produce a one if the inputs register a zero signal in any combination, rather than a high signal.
    • Buffer Gate - a buffer logic gate behaves in the opposite manner of a NOT gate, in that it passes a signal unchanged from input to output.

    Applications

    As CPUs employ binary logic, logic gates are essentially the building blocks of computers. As such, they can be found in many kinds of digital circuits such as:

    • Encoders & Decoders
    • Multiplexers & Demultiplexers
    • Full and half adders

    1060 產品顯示為 Logic Gates

    Nexperia
    Schmitt Trigger Input
    NAND
    Surface Mount
    4
    2
    TSSOP14
    14
    -
    -
    -
    -
    -
    -
    -
    Nexperia
    -
    AND
    Surface Mount
    4
    2
    SO14
    14
    -
    -
    -
    -
    -
    -
    -
    onsemi
    -
    NAND
    Surface Mount
    4
    2
    SOIC
    14
    HC
    -
    6 V
    -5.2mA
    15 ns @ 6 V, 18 ns @ 4.5 V, 90 ns @ 2 V
    2 V
    5.2mA
    Texas Instruments
    -
    NAND
    Surface Mount
    2
    2
    VSSOP
    8
    LVC
    -
    5.5 V
    -32mA
    3.3 ns @ 5 V, 4.3 ns @ 3.3 V
    1.65 V
    32mA
    Texas Instruments
    -
    NAND
    Surface Mount
    4
    2
    SOIC
    14
    4000
    -
    18 V
    -4.2mA
    120 ns @ 10 V, 250 ns @ 5 V, 90 ns @ 15 V
    3 V
    4.2mA
    Texas Instruments
    Schmitt Trigger Input
    NAND
    Through Hole
    4
    2
    CDIP
    14
    4000
    CMOS
    18 V
    -4.2mA
    380 ns @ 50 pF
    3 V
    4.2mA
    Texas Instruments
    -
    AND
    Surface Mount
    4
    2
    SOIC
    14
    LS
    -
    5.25 V
    -0.4mA
    20 ns @ 5 V
    4.75 V
    8mA
    Toshiba
    -
    NAND
    Through Hole
    4
    2
    PDIP
    14
    AC
    -
    5.5 V
    -24mA
    11.2 ns @ 3.3 V, 7 ns @ 5 V
    2 V
    24mA
    Toshiba
    -
    AND
    Through Hole
    2
    4
    PDIP
    14
    HC
    -
    6 V
    -5.2mA
    100 ns @ 2 V, 17 ns @ 6 V, 20 ns @ 4.5 V
    2 V
    5.2mA
    onsemi
    -
    OR
    Surface Mount
    1
    2
    SOT-23
    5
    TinyLogic UHS
    CMOS
    5.5 V
    -32mA
    5.5ns
    1.65 V
    32mA
    Texas Instruments
    -
    AND
    Through Hole
    4
    2
    PDIP
    14
    LS
    -
    5.25 V
    -0.4mA
    20 ns @ 5 V
    4.75 V
    8mA
    Texas Instruments
    -
    NAND
    Surface Mount
    1
    2
    SOT-23
    5
    LVC
    CMOS, TTL
    5.5 V
    -32mA
    4.3 ns @ 5 V
    1.65 V
    32mA
    Texas Instruments
    -
    NAND
    Through Hole
    4
    2
    PDIP
    14
    LS
    -
    5.25 V
    -0.4mA
    15 ns @ 5 V
    4.75 V
    8mA
    Texas Instruments
    -
    AND
    Surface Mount
    1
    2
    SOT-23
    5
    -
    -
    -
    -
    -
    -
    -
    Nexperia
    -
    NAND
    Surface Mount
    4
    2
    SO
    14
    74HC
    CMOS
    6 V
    -5.2mA
    135 ns @ 50 pF
    2 V
    5.2mA
    Texas Instruments
    -
    AND
    Surface Mount
    4
    2
    SOIC
    14
    HCT
    -
    5.5 V
    -4mA
    22 ns @ 5.5 V, 24 ns @ 4.5 V
    4.5 V
    4mA
    Texas Instruments
    -
    NAND
    Through Hole
    4
    2
    PDIP
    14
    HC
    -
    6 V
    -5.2mA
    15 ns @ 6 V, 18 ns @ 4.5 V, 90 ns @ 2 V
    2 V
    5.2mA
    Texas Instruments
    -
    XNOR
    Through Hole
    4
    2
    PDIP
    14
    4000
    -
    18 V
    -4.2mA
    100 ns @ 15 V, 130 ns @ 10 V, 280 ns @ 5 V
    3 V
    4.2mA
    Texas Instruments
    -
    NOR
    Through Hole
    4
    2
    PDIP
    14
    LS
    -
    5.25 V
    -0.4mA
    15 ns @ 5 V
    4.75 V
    8mA
    Texas Instruments
    -
    AND
    Surface Mount
    1
    2
    SC-70
    5
    AHC
    -
    5.5 V
    -8mA
    12.3 ns @ 3.3 V, 7.9 ns @ 5 V
    2 V
    8mA
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