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. 152-5541
Fabrikantnummer74LVC1G11GW,125
FabrikantNexperia
€ 0,087
Each (In a Pack of 100)
Aantal stuks
AND Surface Mount 1 3 - TSSOP 6 74LVC CMOS 5.5 V - 21.5 ns @ 50 pF 1.65 V -
RS-stocknr. 662-9749
FabrikantnummerCD74AC08M
€ 0,198
Each (In a Pack of 5)
Aantal stuks
AND Surface Mount 4 2 No SOIC 14 AC - 5.5 V -24mA 8.7 ns @ 5 V, 12.2 ns @ 3.3 V, 109 ns @ 1.5 V 1.5 V 24mA
RS-stocknr. 165-8615
Fabrikantnummer74LVC1G57GW,125
FabrikantNexperia
€ 0,047
Each (On a Reel of 3000)
Aantal stuks
Multifunction Surface Mount 1 3 No SC-88 6 LVC TTL 5.5 V -32mA 10.6 ns @ 50 pF 1.65 V 32mA
RS-stocknr. 775-7744
Fabrikantnummer74HC1G08GW,125
FabrikantNexperia
€ 0,087
Each (In a Bag of 120)
Aantal stuks
AND Surface Mount 1 2 No TSSOP 5 HC CMOS 6 V -2.6mA 135ns 2 V 2.6mA
RS-stocknr. 922-2931
FabrikantnummerSN74HC7002D
€ 1,964
Each (In a Tube of 50)
Aantal stuks
NOR Surface Mount 4 2 Yes SOIC 14 HC Schmitt Trigger 6 V -5.2mA 22 ns @ 6 V, 26 ns @ 4.5 V, 130 ns @ 2 V 2 V 5.2mA
RS-stocknr. 145-0020
FabrikantnummerSN74ALS02AN
€ 0,35
Each (In a Tube of 25)
Aantal stuks
NOR Through Hole 4 2 No PDIP 14 ALS - 5.5 V -0.4mA 12 ns @ 4.5 V → 5.5 V 4.5 V 8mA
RS-stocknr. 162-7480
FabrikantnummerSN74LVC1G97DCKR
€ 0,065
Each (On a Reel of 3000)
Aantal stuks
Multifunction Surface Mount 1 3 Yes SC-70 6 LVC Schmitt Trigger 5.5 V -32mA 5.1 ns @ 5 V, 6.3 ns @ 3.3 V 1.65 V 32mA
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. 170-7976
Fabrikantnummer74HC02D,653
FabrikantNexperia
€ 0,062
Each (On a Reel of 2500)
Aantal stuks
NOR Surface Mount 4 2 - SO 14 74HC CMOS 6 V -5.2mA 135 ns @ 50 pF 2 V 5.2mA
RS-stocknr. 162-6703
FabrikantnummerSN74LVC1G11DSFR
€ 0,12
Each (On a Reel of 5000)
Aantal stuks
AND Surface Mount 1 3 No SON 6 LVC Differential 5.5 V -4mA 20 ns @ 50 pF 1.65 V 32mA
Nieuw
RS-stocknr. 218-4590
FabrikantnummerSN74HC08DR
€ 0,293
Each (In a Pack of 25)
Aantal stuks
AND Surface Mount 4 2 No SOIC 14 - - - - - - -
RS-stocknr. 145-5275
FabrikantnummerMC74VHC02DTR2G
FabrikantON Semiconductor
€ 0,074
Each (On a Reel of 2500)
Aantal stuks
NOR Surface Mount 4 2 No TSSOP 14 VHC CMOS 5.5 V -8mA 13 ns @ 50 pF 2 V 8mA
RS-stocknr. 165-8859
Fabrikantnummer74LVC1G58W6-7
FabrikantDiodesZetex
€ 0,042
Each (On a Reel of 3000)
Aantal stuks
Multifunction Surface Mount 1 3 No SOT-26 6 LVC CMOS 5.5 V -32mA - 1.65 V 32mA
RS-stocknr. 166-2877
FabrikantnummerNC7SZ08L6X
FabrikantON Semiconductor
€ 0,095
Each (On a Reel of 5000)
Aantal stuks
AND Surface Mount 1 2 No MicroPak 6 TinyLogic UHS CMOS 5.5 V -32mA 5.5ns 1.65 V 32mA
RS-stocknr. 124-2267
Fabrikantnummer74HCT08PW,112
FabrikantNexperia
€ 0,056
Each (In a Tube of 96)
Aantal stuks
AND Surface Mount 4 2 - TSSOP 14 HCT TTL 5.5 V -4mA 36ns 4.5 V 4mA
RS-stocknr. 168-4296
FabrikantnummerSN74LVC2G86DCUT
€ 0,268
Each (On a Reel of 250)
Aantal stuks
OR Surface Mount 2 2 No US 8 LVC Differential 5.5 V -4mA 4.2 ns @ 50 pF 1.65 V 32mA
RS-stocknr. 145-3638
FabrikantnummerM74VHC1GT14DFT2G
FabrikantON Semiconductor
€ 0,031
Each (On a Reel of 3000)
Aantal stuks
Inverter Surface Mount 1 - - SC-70 5 VHC LS-TTL 5.5 V -8mA 20.5 ns @ 50 pF 3 V 8mA
RS-stocknr. 806-3721
FabrikantnummerMC74LCX08DR2G
FabrikantON Semiconductor
€ 0,306
Each (In a Pack of 50)
Aantal stuks
AND Surface Mount 4 2 No SOIC 14 LCX CMOS 3.6 V -24mA 6.6 ns @ 30 pF 2 V 24mA
RS-stocknr. 181-7358
Fabrikantnummer74LVC32AD,112
FabrikantNexperia
€ 0,058
Each (In a Tube of 57)
Aantal stuks
OR Surface Mount 4 2 - SO 14 74LVC CMOS, TTL 3.6 V -24mA 10.4 ns @ 50 pF 1.65 V 24mA
RS-stocknr. 663-1877
FabrikantnummerSN74HC02PW
€ 0,291
Each (In a Pack of 10)
Aantal stuks
NOR Surface Mount 4 2 No TSSOP 14 HC - 6 V -5.2mA 15 ns @ 6 V, 18 ns @ 4.5 V, 90 ns @ 2 V 2 V 5.2mA