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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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 442-909
Référence fabricantSN74HC02N
0,48 €
Each
Unité
NOR Through Hole 4 2 No PDIP 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 510-201
Référence fabricant74LVC1G08GW,125
MarqueNexperia
0,12 €
Each (In a Pack of 50)
Unité
AND Surface Mount 1 2 No TSSOP 5 LVC - 5.5 V -32mA - 1.65 V 32mA
N° de stock RS 169-8532
Référence fabricantNC7SZ08M5X
0,064 €
Each (On a Reel of 3000)
Unité
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 662-8770
Référence fabricantSN74LVC1G332DCKRG4
0,219 €
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 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 527-069
Référence fabricantCD4070BE
0,392 €
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 145-3981
Référence fabricantM74VHC1GT86DFT1G
0,023 €
Each (On a Reel of 3000)
Unité
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 162-7470
Référence fabricantSN74LVC1G332DCKRG4
0,084 €
Each (On a Reel of 3000)
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 103-8395
Référence fabricantHEF4001BT,652
MarqueNexperia
0,259 €
Each (In a Tube of 57)
Unité
NOR Surface Mount 4 2 No SOIC 14 4000 - 15 V -4.2mA 40 ns @ 15 V, 50 ns @ 10 V, 120 ns @ 5 V 3 V 4.2mA
N° de stock RS 662-9685
Référence fabricantCD4093BPW
0,329 €
Each (In a Pack of 10)
Unité
NAND Surface Mount 4 2 Yes TSSOP 14 4000 Schmitt Trigger 18 V -4.2mA 130 ns @ 15 V, 180 ns @ 10 V, 380 ns @ 5 V 3 V 4.2mA
N° de stock RS 923-2477
Référence fabricantSN74HC02N
0,324 €
Each (In a Tube of 25)
Unité
NOR Through Hole 4 2 No PDIP 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 145-0690
Référence fabricantCD4093BPW
0,322 €
Each (In a Tube of 90)
Unité
NAND Surface Mount 4 2 Yes TSSOP 14 4000 Schmitt Trigger 18 V -4.2mA 130 ns @ 15 V, 180 ns @ 10 V, 380 ns @ 5 V 3 V 4.2mA
N° de stock RS 307-519
Référence fabricantSN74LS08N
0,61 €
Each
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 805-1576
Référence fabricantM74VHC1GT86DFT1G
0,022 €
Each (In a Pack of 100)
Unité
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 145-0385
Référence fabricantSN74LS03N
0,691 €
Each (In a Tube of 25)
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 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 178-4789
Référence fabricantMC74HC32ADG
0,071 €
Each (In a Tube of 55)
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 145-3978
Référence fabricantM74VHC1GT04DTT1G
0,029 €
Each (On a Reel of 3000)
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Inverter Surface Mount 1 - - TSOP 5 VHC LSSTL 5.5 V -8mA 17.5 ns @ 50 pF 3 V 8mA
N° de stock RS 809-6103
Référence fabricant74AC11008D
2,33 €
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 170-8017
Référence fabricant74HCT132D,653
MarqueNexperia
0,099 €
Each (On a Reel of 2500)
Unité
NAND Surface Mount 4 2 Yes SO 14 74HCT Schmitt Trigger 5.5 V -4mA 50 ns @ 50 pF 4.5 V 4mA