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

...
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Beskrivning Pris Logic Function Mounting Type Number of Elements Number of Inputs per Gate Schmitt Trigger Input Package Type Pin Count Logic Family Input Type Maximum Operating Supply Voltage Maximum High Level Output Current Maximum Propagation Delay Time @ Maximum CL Minimum Operating Supply Voltage Maximum Low Level Output Current
RS-artikelnummer 145-7371
Tillv. art.nrSN74AUP1G08DCKR
VarumärkeTexas Instruments
0,769 kr
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AND Surface Mount 1 2 No SC-70 5 AUP - 3.6 V -4mA 6.2 ns @ 3.3 V, 7.6 ns @ 2.5 V, 11 ns @ 1.8 V, 14.2 ns @ 1.5 V, 20.9 ns @ 1.2 V 0.8 V 4mA
RS-artikelnummer 166-3744
Tillv. art.nrNC7SV08P5X
VarumärkeON Semiconductor
0,571 kr
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AND Surface Mount 1 2 No SC-70 5 TinyLogic ULP-A CMOS 3.6 V -24mA 5.3 ns @ 30 pF 0.9 V 24mA
RS-artikelnummer 806-6247
Tillv. art.nrNC7SV08P5X
VarumärkeON Semiconductor
2,237 kr
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AND Surface Mount 1 2 No SC-70 5 TinyLogic ULP-A CMOS 3.6 V -24mA 5.3 ns @ 30 pF 0.9 V 24mA
RS-artikelnummer 124-2270
Tillv. art.nr74LVC125APW,112
VarumärkeNexperia
2,521 kr
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Buffer, Line Driver Surface Mount - - No TSSOP 14 LVC Single Ended 3.6 V -24mA 2.4 ns @ 3.3 V 1.2 V 24mA
RS-artikelnummer 170-8016
Tillv. art.nr74LVC125APW,118
VarumärkeNexperia
0,796 kr
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Buffer, Line Driver Surface Mount - - - TSSOP 14 74LVC Single Ended 3.6 V -24mA 12.8 ns @ 50 pF 1.2 V 24mA
RS-artikelnummer 662-7967
Tillv. art.nrSN74AUP1G08DCKR
VarumärkeTexas Instruments
2,495 kr
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AND Surface Mount 1 2 No SC-70 5 AUP - 3.6 V -4mA 6.2 ns @ 3.3 V, 7.6 ns @ 2.5 V, 11 ns @ 1.8 V, 14.2 ns @ 1.5 V, 20.9 ns @ 1.2 V 0.8 V 4mA
RS-artikelnummer 528-270
Tillv. art.nrSN74AHCT1G32DBVR
VarumärkeTexas Instruments
2,107 kr
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OR Surface Mount 1 2 No SOT-23 5 AHCT - 5.5 V -8mA 7.9 ns @ 5 V 4.5 V 8mA
RS-artikelnummer 217-5645
Tillv. art.nrSN74HC32N
VarumärkeTexas Instruments
5,12 kr
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OR Through Hole 4 2 No PDIP 14 HC - 6 V -5.2mA 17 ns @ 6 V, 20 ns @ 4.5 V, 100 ns @ 2 V 2 V 5.2mA
RS-artikelnummer 709-1961
Tillv. art.nrCD4001BE
VarumärkeTexas Instruments
4,191 kr
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NOR Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 90 ns @ 15 V, 120 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS-artikelnummer 100-0761
Tillv. art.nrSN74HC32N
VarumärkeTexas Instruments
3,758 kr
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OR Through Hole 4 2 No PDIP 14 HC - 6 V -5.2mA 17 ns @ 6 V, 20 ns @ 4.5 V, 100 ns @ 2 V 2 V 5.2mA
RS-artikelnummer 162-4283
Tillv. art.nrSN74AHCT1G32DBVR
VarumärkeTexas Instruments
0,434 kr
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OR Surface Mount 1 2 No SOT-23 5 AHCT - 5.5 V -8mA 7.9 ns @ 5 V 4.5 V 8mA
RS-artikelnummer 773-7734
Tillv. art.nrMC14001UBDR2G
VarumärkeON Semiconductor
2,506 kr
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NOR Surface Mount 4 2 No SOIC 14 - CMOS 18 V -3.5mA 180 ns @ 50 pF -0.5 V dc 8.8mA
RS-artikelnummer 163-0947
Tillv. art.nrMC14001UBDR2G
VarumärkeON Semiconductor
1,03 kr
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NOR Surface Mount 4 2 No SOIC 14 - CMOS 18 V -3.5mA 180 ns @ 50 pF -0.5 V dc 8.8mA
RS-artikelnummer 166-0006
Tillv. art.nr74HC2G08DP,125
VarumärkeNexperia
1,207 kr
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AND Surface Mount 2 2 No TSSOP 8 HC CMOS 6 V -5.2mA 110 ns @ 15 pF 2 V 5.2mA
RS-artikelnummer 813-9294
Tillv. art.nr74HC2G08DP,125
VarumärkeNexperia
3,267 kr
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AND Surface Mount 2 2 No TSSOP 8 HC CMOS 6 V -5.2mA 110 ns @ 15 pF 2 V 5.2mA
RS-artikelnummer 662-8718
Tillv. art.nrSN74LVC1G10DCKR
VarumärkeTexas Instruments
0,319 kr
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NAND Surface Mount 1 3 No SC-70 6 LVC - 5.5 V -32mA 3.6 ns @ 5 V, 5 ns @ 3.3 V 1.65 V 32mA
RS-artikelnummer 923-6699
Tillv. art.nrCD4001BE
VarumärkeTexas Instruments
4,184 kr
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NOR Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 90 ns @ 15 V, 120 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS-artikelnummer 162-7462
Tillv. art.nrSN74LVC1G10DCKR
VarumärkeTexas Instruments
0,241 kr
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NAND Surface Mount 1 3 No SC-70 6 LVC - 5.5 V -32mA 3.6 ns @ 5 V, 5 ns @ 3.3 V 1.65 V 32mA
RS-artikelnummer 165-9979
Tillv. art.nr74HC1G08GW,125
VarumärkeNexperia
0,41 kr
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AND Surface Mount 1 2 No TSSOP 5 HC CMOS 6 V -2.6mA 135ns 2 V 2.6mA
RS-artikelnummer 166-2410
Tillv. art.nrNC7SZ00M5X
VarumärkeON Semiconductor
0,71 kr
Each (On a Reel of 3000)
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NAND Surface Mount 1 2 No SOT-23 5 TinyLogic UHS CMOS 5.5 V -32mA 5.2ns 1.65 V 32mA