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 333-4520
Référence fabricantCD74HCT32E
0,398 €
Each (In a Tube of 25)
Unité
OR Through Hole 4 2 No PDIP 14 HCT - 5.5 V -4mA 24 ns @ 4.5 V 4.5 V 4mA
N° de stock RS 178-7002
Référence fabricantHEF4077BT,652
MarqueNexperia
0,279 €
Each (In a Tube of 57)
Unité
XNOR Surface Mount 4 2 No SOIC 14 4000 - 15 V -3.6mA 150 ns @ 5 V, 55 ns @ 15 V, 70 ns @ 10 V 3 V 3.6mA
N° de stock RS 806-3220
Référence fabricantMC14082BDG
0,089 €
Each (In a Pack of 55)
Unité
AND Surface Mount 2 2 No SOIC 14 4000 - 18 V -10mA 300 ns @ 50 pF 3 V 10mA
N° de stock RS 305-232
Référence fabricantSN74LS09N
0,84 €
Each
Unité
AND Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.1mA 35 ns @ 5 V 4.75 V 8mA
N° de stock RS 809-6103
Référence fabricant74AC11008D
2,27 €
Each (In a Pack of 4)
Unité
AND Surface Mount 4 2 No SOIC 16 AC Differential 5.5 V -24mA 10.2 ns @ 50 pF 3 V 24mA
N° de stock RS 709-2407
Référence fabricantCD4019BE
0,347 €
Each (In a Pack of 10)
Unité
AND/OR Through Hole 4 2 No PDIP 16 4000 - 18 V -4.2mA 100 ns @ 15 V, 120 ns @ 10 V, 300 ns @ 5 V 3 V 4.2mA
N° de stock RS 662-9483
Référence fabricantCD4001UBE
0,353 €
Each (In a Pack of 10)
Unité
NOR Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 120 ns @ 5 V, 50 ns @ 15 V, 60 ns @ 10 V 3 V 4.2mA
N° de stock RS 162-6937
Référence fabricantCD74HC08M96
0,123 €
Each (On a Reel of 2500)
Unité
AND Surface Mount 4 2 No SOIC 14 HC - 6 V -5.2mA 15 ns @ 6 V, 18 ns @ 4.5 V, 90 ns @ 2 V 2 V 5.2mA
N° de stock RS 670-9731
Référence fabricantMM74HC00MX
0,385 €
Each (In a Pack of 10)
Unité
NAND Surface Mount 4 2 No SOIC 14 HC - 6 V -5.2mA 15 ns @ 6 V, 18 ns @ 4.5 V, 90 ns @ 2 V 2 V 5.2mA
N° de stock RS 178-9074
Référence fabricantSN74HC20NE4
0,237 €
Each (In a Tube of 25)
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NAND Through Hole 2 4 No PDIP 14 HC - 6 V -5.2mA 110 ns @ 2 V, 19 ns @ 6 V, 22 ns @ 4.5 V 2 V 5.2mA
N° de stock RS 633-953
Référence fabricantCD74HCT32E
0,48 €
Each
Unité
OR Through Hole 4 2 No PDIP 14 HCT - 5.5 V -4mA 24 ns @ 4.5 V 4.5 V 4mA
N° de stock RS 166-0415
Référence fabricant74LVC1G32W5-7
MarqueDiodesZetex
0,022 €
Each (On a Reel of 3000)
Unité
OR Surface Mount 1 2 No SOT-25 5 LVC - 5.5 V -32mA 5.5ns 1.65 V 32mA
N° de stock RS 307-480
Référence fabricantSN74LS00N
0,54 €
Each
Unité
NAND Through Hole 4 2 No PDIP 14 LS CMOS 5.25 V -0.4mA 15 ns @ 5 V 4.75 V 8mA
N° de stock RS 662-6976
Référence fabricantCD74HC00M96
0,25 €
Each (In a Pack of 10)
Unité
NAND Surface Mount 4 2 No SOIC 14 HC - 6 V -5.2mA 15 ns @ 6 V, 18 ns @ 4.5 V, 90 ns @ 2 V 2 V 5.2mA
N° de stock RS 145-6437
Référence fabricantCD4019BMT
0,268 €
Each (On a Reel of 250)
Unité
AND/OR Surface Mount 4 2 No SOIC 16 4000 Differential 18 V -4.2mA 300 ns @ 50 pF 3 V 4.2mA
N° de stock RS 309-048
Référence fabricantSN74LS03N
0,81 €
Each
Unité
NAND Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.1mA 32 ns @ 5 V 4.75 V 8mA
N° de stock RS 124-2313
Référence fabricantHEF4093BT,652
MarqueNexperia
0,292 €
Each (In a Tube of 57)
Unité
NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 15 V -4.2mA 185 ns @ 5 V, 60 ns @ 15 V, 80 ns @ 10 V 3 V 4.2mA
N° de stock RS 806-3119
Référence fabricantMC14011BDR2G
0,268 €
Each (On a Tape of 50)
Unité
NAND Surface Mount 4 2 No SOIC 14 4000 - 18 V -10mA 250 ns @ 50 pF 3 V 10mA
N° de stock RS 775-7762
Référence fabricant74HC1G86GW,125
MarqueNexperia
0,195 €
Each (On a Tape of 30)
Unité
XOR Surface Mount 1 2 No TSSOP 5 HC CMOS 6 V -2.6mA 135ns 2 V 2.6mA
N° de stock RS 809-6175
Référence fabricantCD4019BMT
0,275 €
Each (In a Pack of 10)
Unité
AND/OR Surface Mount 4 2 No SOIC 16 4000 Differential 18 V -4.2mA 300 ns @ 50 pF 3 V 4.2mA