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

    1029 Products showing for Logic Gates

    onsemi
    -
    Multiplexer
    Surface Mount
    1
    4
    SOIC-NB
    16
    ECL
    Single Ended
    -5.7 (NECL) V, 5.7 (PECL) V
    -
    710ps
    -4.2 (NECL) V, 4.2 (PECL) V
    -
    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
    Nexperia
    -
    AND
    Surface Mount
    1
    2
    TSSOP
    5
    74AHC
    CMOS
    5.5 V
    -
    10.5 ns @ 50 pF
    4.5 V
    -
    Toshiba
    Schmitt Trigger Input
    NAND
    Surface Mount
    4
    2
    SOIC
    14
    74HC
    CMOS, Schmitt Trigger
    6 V
    -5.2mA
    140 ns @ 50 pF
    2 V
    5.2mA
    DiodesZetex
    -
    AND
    Surface Mount
    4
    2
    SOIC
    14
    HC
    Schmitt Trigger
    6 V
    -4mA
    125 ns @ 50 pF
    2 V
    5.2mA
    onsemi
    Schmitt Trigger Input
    Inverter
    Surface Mount
    6
    -
    TSSOP
    14
    LVX
    Schmitt Trigger
    3.6 V
    -4mA
    23 ns @ 50 pF
    2 V
    4mA
    Nexperia
    -
    NAND
    Surface Mount
    1
    2
    SC-74A
    5
    LVC
    TTL
    5.5 V
    -32mA
    7.5 ns @ 50 pF
    1.65 V
    32mA
    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
    onsemi
    -
    AND
    Surface Mount
    1
    2
    SC-70
    5
    TinyLogic ULP-A
    CMOS
    3.6 V
    -24mA
    5.3 ns @ 30 pF
    0.9 V
    24mA
    Texas Instruments
    Schmitt Trigger Input
    NAND
    Surface Mount
    1
    2
    SOT-23
    5
    -
    -
    -
    -
    -
    -
    -
    onsemi
    -
    NAND
    Surface Mount
    -
    2
    SOIC
    14
    HC
    CMOS
    6 V
    5.2mA
    15 ns @ 15 pF
    2 V
    5.2mA
    Nexperia
    -
    NOR
    Surface Mount
    4
    2
    SO14
    14
    -
    -
    -
    -
    -
    -
    -
    Nexperia
    -
    NOR
    Surface Mount
    4
    2
    SO14
    14
    -
    -
    -
    -
    -
    -
    -
    onsemi
    -
    NAND
    Surface Mount
    4
    2
    SOIC
    14
    4000
    -
    18 V
    -10mA
    250 ns @ 50 pF
    3 V
    10mA
    onsemi
    -
    AND
    Surface Mount
    4
    2
    TSSOP
    14
    HC
    CMOS
    6 V
    5.2mA
    110ns
    2 V
    5.2mA
    Nexperia
    Schmitt Trigger Input
    NAND
    Surface Mount
    4
    2
    SOIC
    14
    HCT
    Schmitt Trigger
    5.5 V
    -4mA
    33 ns @ 4.5 V
    4.5 V
    4mA
    Nexperia
    Schmitt Trigger Input
    AND
    Surface Mount
    -
    2
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Nexperia
    -
    OR
    Surface Mount
    1
    2
    TSSOP
    5
    LVC
    -
    5.5 V
    -32mA
    -
    1.65 V
    32mA
    Nexperia
    -
    NOR
    Surface Mount
    1
    2
    TSSOP
    5
    AHC
    -
    5.5 V
    -8mA
    11.4 ns @ 3.3 V, 7.5 ns @ 5 V
    2 V
    8mA
    Texas Instruments
    -
    AND
    Surface Mount
    4
    2
    SOIC
    14
    LS
    -
    5.25 V
    -0.4mA
    20 ns @ 5 V
    4.75 V
    8mA
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