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 662-8994
Référence fabricantSN74LVC32ADR
0,055 €
Each (In a Pack of 10)
Unité
OR Surface Mount 4 2 No SOIC 14 LVC - 3.6 V -24mA 3.6 ns @ 3.3 V, 4.2 ns @ 2.7 V 1.65 V 24mA
N° de stock RS 662-6982
Référence fabricantCD74HC08M96
0,25 €
Each (In a Pack of 10)
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 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 663-0679
Référence fabricantCD74HCT86M
0,601 €
Each (In a Pack of 10)
Unité
XOR Surface Mount 4 2 No SOIC 14 HCT - 5.5 V -4mA 32 ns @ 4.5 V 4.5 V 4mA
N° de stock RS 178-7127
Référence fabricant74LVC1G02GW,125
MarqueNexperia
0,028 €
Each (On a Reel of 3000)
Unité
NOR Surface Mount 1 2 No TSSOP 5 LVC - 5.5 V -32mA - 1.65 V 32mA
N° de stock RS 923-6801
Référence fabricantCD4011UBE
0,354 €
Each (In a Tube of 25)
Unité
NAND 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 463-442
Référence fabricantMC74HC32ADG
0,072 €
Each (In a Pack of 20)
Unité
OR Surface Mount 4 2 No SOIC 14 HC - 6 V -5.2mA 13 ns @ 6 V, 15 ns @ 4.5 V, 30 ns @ 3 V, 75 ns @ 2 V 2 V 5.2mA
N° de stock RS 923-2341
Référence fabricantSN74LS32N
0,433 €
Each (In a Tube of 25)
Unité
OR Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 22 ns @ 5 V 4.75 V 8mA
N° de stock RS 732-0780
Référence fabricantCD74HC30M96
0,34 €
Each (In a Pack of 5)
Unité
NAND Surface Mount 1 8 No SOIC 14 HC CMOS 6 V -5.2mA 195ns 2 V 5.2mA
N° de stock RS 103-8093
Référence fabricant74HC1G86GW,125
MarqueNexperia
0,043 €
Each (On a Reel of 3000)
Unité
XOR Surface Mount 1 2 No TSSOP 5 HC CMOS 6 V -2.6mA 135ns 2 V 2.6mA
N° de stock RS 806-2144
Référence fabricantMC74AC08DG
0,331 €
Each (In a Pack of 55)
Unité
AND Surface Mount 4 2 No SOIC 14 AC TTL 6 V -24mA 10 ns @ 50 pF 2 V 24mA
N° de stock RS 178-9074
Référence fabricantSN74HC20NE4
0,237 €
Each (In a Tube of 25)
Unité
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 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
N° de stock RS 709-2611
Référence fabricantCD74AC02E
0,45 €
Each (In a Pack of 10)
Unité
NOR Through Hole 4 2 No PDIP 14 AC - 5.5 V -24mA 11.5 ns @ 5 V, 144 ns @ 1.5 V, 16.1 ns @ 3.3 V 1.5 V 24mA
N° de stock RS 168-4141
Référence fabricantCD74HC30M96
0,09 €
Each (On a Reel of 2500)
Unité
NAND Surface Mount 1 8 No SOIC 14 HC CMOS 6 V -5.2mA 195ns 2 V 5.2mA
N° de stock RS 333-3814
Référence fabricantCD74HCT08E
0,398 €
Each (In a Tube of 25)
Unité
AND Through Hole 4 2 No PDIP 14 HCT - 5.5 V -4mA 25 ns @ 4.5 V 4.5 V 4mA
N° de stock RS 166-1843
Référence fabricant74AC08SC
0,416 €
Each (In a Tube of 55)
Unité
AND Surface Mount 4 2 No SOIC 14 AC - 6 V -24mA 7.5 ns @ 5 V, 9.5 ns @ 3.3 V 2 V 24mA
N° de stock RS 518-8650A
Référence fabricantMC14011BDG
0,301 €
Each (In a Pack of 55)
Unité
NAND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 100 ns @ 10 V, 250 ns @ 5 V, 80 ns @ 15 V 3 V 4.2mA
N° de stock RS 178-6994
Référence fabricant74HCT132D,652
MarqueNexperia
0,285 €
Each (In a Tube of 57)
Unité
NAND Surface Mount 4 2 Yes SOIC 14 HCT Schmitt Trigger 5.5 V -4mA 33 ns @ 4.5 V 4.5 V 4mA
N° de stock RS 709-2217
Référence fabricantSN74HC20NE4
0,264 €
Each (In a Pack of 20)
Unité
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