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.

Types of Logic Gate

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

  • AND Gates. This gate has multiple inputs that are processed to a single signal 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. Like 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

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Description Prix 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
N° de stock RS 121-8348
Référence fabricantCD4011BE
0,362 €
Each (In a Tube of 25)
Unité
NAND Through Hole 4 2 - PDIP 14 4000 - 18 V -4.2mA 120 ns @ 10 V, 250 ns @ 5 V, 90 ns @ 15 V 3 V 4.2mA
N° de stock RS 184-4768
Référence fabricantM74VHC1G132DTT1G
0,09 €
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Unité
NAND Surface Mount 1 1 Yes TSOP 5 74VHC Schmitt Trigger 5.5 V - 19.6ns 2 V -
N° de stock RS 304-093
Référence fabricantSN7432N
1,95 €
Each
Unité
OR Through Hole 4 2 No PDIP 14 74 - 5.25 V -0.8mA 22 ns @ 5 V 4.75 V 16mA
N° de stock RS 368-5569
Référence fabricantSN7400N
1,178 €
Each (In a Tube of 25)
Unité
NAND Through Hole 4 2 No PDIP 14 74 - 5.25 V -0.4mA 22 ns @ 5 V 4.75 V 16mA
N° de stock RS 527-441
Référence fabricantCD4030BE
0,339 €
Each (In a Tube of 25)
Unité
XOR Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 100 ns @ 15 V, 130 ns @ 10 V, 280 ns @ 5 V 3 V 4.2mA
N° de stock RS 162-4284
Référence fabricantSN74ALS09N
0,658 €
Each (In a Tube of 25)
Unité
AND Through Hole 4 2 No PDIP 14 ALS - 5.5 V -0.1mA 54 ns @ 4.5 V → 5.5 V 4.5 V 8mA
N° de stock RS 923-2300
Référence fabricantSN7432N
1,62 €
Each (In a Tube of 25)
Unité
OR Through Hole 4 2 No PDIP 14 74 - 5.25 V -0.8mA 22 ns @ 5 V 4.75 V 16mA
N° de stock RS 178-7554
Référence fabricant74ACT00SCX
0,167 €
Each (On a Reel of 2500)
Unité
NAND Surface Mount 4 2 No SOIC 14 ACT TTL 6 V -24mA 10ns 2 V 24mA
N° de stock RS 526-537
Référence fabricantCD4011BE
0,362 €
Each (In a Tube of 25)
Unité
NAND Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 120 ns @ 10 V, 250 ns @ 5 V, 90 ns @ 15 V 3 V 4.2mA
N° de stock RS 368-5812
Référence fabricantSN7432N
1,62 €
Each (In a Tube of 25)
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OR Through Hole 4 2 No PDIP 14 74 - 5.25 V -0.8mA 22 ns @ 5 V 4.75 V 16mA
N° de stock RS 805-1576
Référence fabricantM74VHC1GT86DFT1G
0,073 €
Each (In a Pack of 100)
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XOR Surface Mount 1 2 No SC-88A 5 VHC TTL 5.5 V -8mA 19.5 ns @ 50 pF 3 V 8mA
N° de stock RS 662-8770
Référence fabricantSN74LVC1G332DCKRG4
0,214 €
Each (In a Pack of 10)
Unité
OR Surface Mount 1 3 No SC-70 6 LVC - 5.5 V -32mA 3.5 ns @ 5 V, 4.8 ns @ 3.3 V 1.65 V 32mA
N° de stock RS 921-1265
Référence fabricantZXGD3009DYTA
MarqueDiodesZetex
0,066 €
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Non-Inverting Surface Mount 2 - - SOT-363 6 - Single 40 V - - - -
N° de stock RS 166-1442
Référence fabricant74LVC1G00GW,125
MarqueNexperia
0,032 €
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NAND Surface Mount 1 2 No TSSOP 5 LVC - 5.5 V -32mA - 1.65 V 32mA
N° de stock RS 662-8718
Référence fabricantSN74LVC1G10DCKR
0,033 €
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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
N° de stock RS 670-9790
Référence fabricantNC7SZ08M5X
0,248 €
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AND Surface Mount 1 2 No SOT-23 5 TinyLogic UHS - 5.5 V -32mA 4.5 ns @ 5 V, 5.2 ns @ 3.3 V 1.65 V 32mA
N° de stock RS 307-519
Référence fabricantSN74LS08N
0,56 €
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Unité
AND Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 20 ns @ 5 V 4.75 V 8mA
N° de stock RS 178-7128
Référence fabricant74LVC1G08GW,125
MarqueNexperia
0,026 €
Each (On a Reel of 3000)
Unité
AND Surface Mount 1 2 No TSSOP 5 LVC - 5.5 V -32mA - 1.65 V 32mA
N° de stock RS 162-7462
Référence fabricantSN74LVC1G10DCKR
0,023 €
Each (On a Reel of 3000)
Unité
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
N° de stock RS 527-069
Référence fabricantCD4070BE
0,362 €
Each (In a Tube of 25)
Unité
XOR Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 100 ns @ 15 V, 130 ns @ 10 V, 280 ns @ 5 V 3 V 4.2mA