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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Omschrijving Prijs 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
RS-stocknr. 526-486
FabrikantnummerSN74HC132DR
€ 0,267
Each (In a Pack of 25)
Aantal stuks
NAND Surface Mount 4 2 Yes SOIC 14 HC Schmitt Trigger 6 V -5.2mA 21 ns @ 6 V, 25 ns @ 4.5 V, 120 ns @ 2 V 2 V 5.2mA
RS-stocknr. 145-0851
FabrikantnummerSN74LVC1G86DCKT
€ 0,227
Each (On a Reel of 250)
Aantal stuks
XOR Surface Mount 1 2 No SC-70 5 LVC - 5.5 V -32mA 4 ns @ 5 V, 5 ns @ 3.3 V 1.65 V 32mA
RS-stocknr. 663-2401
FabrikantnummerSN74LS132D
€ 0,684
Each (In a Pack of 5)
Aantal stuks
NAND Surface Mount 4 2 Yes SOIC 14 LS Schmitt Trigger 5.25 V -0.4mA 22 ns @ 5 V 4.75 V 8mA
RS-stocknr. 186-8752
FabrikantnummerNC7S32P5X
FabrikantON Semiconductor
€ 0,19
Each (In a Pack of 25)
Aantal stuks
OR Surface Mount 1 2 - SC-70 5 - CMOS 6 V -2.6mA 125 ns @ 50 pF 2 V 2.6mA
RS-stocknr. 171-3150
FabrikantnummerTC7SH09F
FabrikantToshiba
€ 0,033
Each (In a Pack of 50)
Aantal stuks
AND Surface Mount 1 2 - SOT-25 5 - CMOS 5.5 V - 14 ns @ 50 pF 2 V 8mA
RS-stocknr. 510-403
Fabrikantnummer74LVC1G32GW,125
FabrikantNexperia
€ 0,124
Each (In a Pack of 50)
Aantal stuks
OR Surface Mount 1 2 No TSSOP 5 LVC - 5.5 V -32mA - 1.65 V 32mA
RS-stocknr. 169-7238
Fabrikantnummer74HC32T14-13
FabrikantDiodesZetex
€ 0,091
Each (On a Reel of 2500)
Aantal stuks
OR Surface Mount 4 2 Yes TSSOP 14 HC Schmitt Trigger 6 V -4mA 135 ns @ 50 pF 2 V 5.2mA
RS-stocknr. 739-0145
Fabrikantnummer74AC00SCX
FabrikantON Semiconductor
€ 0,524
Each (In a Pack of 5)
Aantal stuks
NAND Surface Mount 4 2 No SOIC 14 AC CMOS 6 V -24mA 10ns 2 V 24mA
RS-stocknr. 145-0150
FabrikantnummerCD74HC21E
€ 0,398
Each (In a Tube of 25)
Aantal stuks
AND Through Hole 2 4 No PDIP 14 HC - 6 V -5.2mA 19 ns @ 6 V, 22 ns @ 4.5 V, 110 ns @ 2 V 2 V 5.2mA
RS-stocknr. 145-0861
FabrikantnummerCD74ACT32E
€ 0,589
Each (In a Tube of 25)
Aantal stuks
OR Through Hole 4 2 No PDIP 14 ACT - 5.5 V -24mA 12.1 ns @ 5 V 4.5 V 24mA
RS-stocknr. 145-3636
FabrikantnummerM74VHC1GT02DFT1G
FabrikantON Semiconductor
€ 0,052
Each (On a Reel of 3000)
Aantal stuks
NOR Surface Mount 1 2 No SC-88A 5 VHC TTL 5.5 V -8mA 17.5 ns @ 50 pF 3 V 8mA
RS-stocknr. 761-4325
Fabrikantnummer74ACT32SCX
FabrikantON Semiconductor
€ 0,404
Each (On a Tape of 25)
Aantal stuks
OR Surface Mount 4 2 No SOIC 14 ACT TTL 6 V -24mA 10ns 2 V 24mA
RS-stocknr. 921-0281
Fabrikantnummer74LVC1G11W6-7
FabrikantDiodesZetex
€ 0,08
Each (In a Pack of 100)
Aantal stuks
AND Surface Mount 1 3 No SOT-26 5 LVC CMOS 5.5 V -32mA 3.7 ns @ 15 pF 1.65 V 32mA
RS-stocknr. 166-0415
Fabrikantnummer74LVC1G32W5-7
FabrikantDiodesZetex
€ 0,041
Each (On a Reel of 3000)
Aantal stuks
OR Surface Mount 1 2 No SOT-25 5 LVC - 5.5 V -32mA 5.5ns 1.65 V 32mA
RS-stocknr. 527-394
FabrikantnummerSN74AHCT08PWR
€ 0,055
Each (In a Pack of 25)
Aantal stuks
AND Surface Mount 4 2 No TSSOP 14 AHCT - 5.5 V -8mA 7.9 ns @ 5 V 4.5 V 8mA
RS-stocknr. 809-6034
FabrikantnummerSN74LVC2G08DCUR
€ 0,258
Each (In a Pack of 10)
Aantal stuks
AND Surface Mount 1 2 No US 8 LVC Differential 5.5 V -4mA 4.8 ns @ 50 pF 1.65 V 32mA
RS-stocknr. 186-7280
FabrikantnummerMC74AC00DG
FabrikantON Semiconductor
€ 0,324
Each (In a Tube of 55)
Aantal stuks
NAND Surface Mount 4 2 - SOIC 14 AC CMOS 6 V -24mA 11 ns @ 50 pF 2 V 24mA
RS-stocknr. 171-3094
FabrikantnummerTC7WH02FU
FabrikantToshiba
€ 0,138
Each (In a Pack of 50)
Aantal stuks
NOR Surface Mount 2 2 - SOT-505 8 - CMOS 5.5 V -8mA 13 ns @ 50 pF 2 V 8mA
RS-stocknr. 186-8246
FabrikantnummerMM74HCT14M
FabrikantON Semiconductor
€ 0,402
Each (In a Pack of 25)
Aantal stuks
- Surface Mount - - Yes SOIC 14 HCT Schmitt Trigger 5.5 V 4.8mA 18 ns @ 15 pF 4.5 V 4.8mA
RS-stocknr. 145-0165
FabrikantnummerSN74AHC86D
€ 0,096
Each (In a Tube of 50)
Aantal stuks
XOR Surface Mount 4 2 No SOIC 14 AHC - 5.5 V -8mA 8.8 ns @ 5 V, 14.5 ns @ 3.3 V 2 V 8mA