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 662-9991
Référence fabricantCD74HC08M
0,417 €
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 170-7964
Référence fabricantHEF4093BT,653
MarqueNexperia
0,089 €
Each (On a Reel of 2500)
Unité
NAND Surface Mount 4 2 Yes SO 14 HEF Schmitt Trigger 15 V -4.2mA 185 ns @ 50 pF 3 V 4.2mA
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 113-0130
Référence fabricant74HC32D,652
MarqueNexperia
0,30 €
Each
Unité
OR 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 145-0450
Référence fabricantSN74HC08PW
0,285 €
Each (In a Tube of 90)
Unité
AND Surface Mount 4 2 No TSSOP 14 HC - 6 V -5.2mA 17 ns @ 6 V, 20 ns @ 4.5 V, 100 ns @ 2 V 2 V 5.2mA
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 80 ns @ 15 V, 100 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
N° de stock RS 923-2341
Référence fabricantSN74LS32N
0,469 €
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 178-9077
Référence fabricantCD4075BE
0,374 €
Each (In a Tube of 25)
Unité
OR Through Hole 3 3 No PDIP 14 4000 - 18 V -4.2mA 90 ns @ 15 V, 120 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
N° de stock RS 670-9731
Référence fabricantMM74HC00MX
0,352 €
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 922-2892
Référence fabricantCD4001UBE
0,354 €
Each (In a Tube of 25)
Unité
NOR Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 50 ns @ 15 V, 60 ns @ 10 V, 120 ns @ 5 V 3 V 4.2mA
N° de stock RS 145-0087
Référence fabricantCD74HCT00E
0,398 €
Each (In a Tube of 25)
Unité
NAND Through Hole 4 2 No PDIP 14 HCT - 5.5 V -4mA 20 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 162-6937
Référence fabricantCD74HC08M96
0,104 €
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 145-0938
Référence fabricantCD4082BPW
0,325 €
Each (In a Tube of 90)
Unité
AND Surface Mount 2 4 No TSSOP 14 4000 Differential 18 V -4.2mA 250 ns @ 50 pF 3 V 4.2mA
N° de stock RS 923-2335
Référence fabricantSN74LS08N
0,504 €
Each (In a Tube of 25)
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 103-2710
Référence fabricantMC14011BDG
0,287 €
Each (In a Tube of 55)
Unité
NAND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 80 ns @ 15 V, 100 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
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 60 ns @ 15 V, 80 ns @ 10 V, 185 ns @ 5 V 3 V 4.2mA
N° de stock RS 145-6437
Référence fabricantCD4019BMT
0,259 €
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 145-0010
Référence fabricantCD4019BE
0,355 €
Each (In a Tube of 25)
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 145-1064
Référence fabricantCD74HCT86M
0,50 €
Each (In a Tube of 50)
Unité
XOR Surface Mount 4 2 No SOIC 14 HCT - 5.5 V -4mA 32 ns @ 4.5 V 4.5 V 4mA