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. 813-9250
Fabrikantnummer74AUP1G32GW,125
FabrikantNexperia
€ 0,248
Each (On a Tape of 40)
Aantal stuks
OR Surface Mount 1 2 Yes TSSOP 5 AUP Schmitt Trigger 3.6 V -4mA 23.7 ns @ 30 pF 0.8 V 4mA
RS-stocknr. 806-2154
FabrikantnummerMC74AC132DG
FabrikantON Semiconductor
€ 0,34
Each (In a Pack of 25)
Aantal stuks
NAND Surface Mount 4 2 Yes SOIC 14 AC Schmitt Trigger 6 V -24mA 15 ns @ 50 pF 2 V 24mA
RS-stocknr. 166-2777
FabrikantnummerMM74HCT08MX
FabrikantON Semiconductor
€ 0,158
Each (On a Reel of 2500)
Aantal stuks
AND Surface Mount 4 2 No SOIC 14 HCT - 5.5 V -4.8mA 18 ns @ 5 V 4.5 V 4.8mA
RS-stocknr. 775-7778
Fabrikantnummer74HCT1G08GW,125
FabrikantNexperia
€ 0,195
Each (In a Bag of 30)
Aantal stuks
AND Surface Mount 1 2 No TSSOP 5 HCT TTL 5.5 V -2mA 27ns 4.5 V 2mA
RS-stocknr. 178-4799
FabrikantnummerMC74AC132DG
FabrikantON Semiconductor
€ 0,34
Each (In a Tube of 55)
Aantal stuks
NAND Surface Mount 4 2 Yes SOIC 14 AC Schmitt Trigger 6 V -24mA 15 ns @ 50 pF 2 V 24mA
RS-stocknr. 165-9930
Fabrikantnummer74AUP1G32GW,125
FabrikantNexperia
€ 0,065
Each (On a Reel of 3000)
Aantal stuks
OR Surface Mount 1 2 Yes TSSOP 5 AUP Schmitt Trigger 3.6 V -4mA 23.7 ns @ 30 pF 0.8 V 4mA
RS-stocknr. 145-0880
FabrikantnummerSN74AHC132D
€ 0,097
Each (In a Tube of 50)
Aantal stuks
NAND Surface Mount 4 2 Yes SOIC 14 AHC Schmitt Trigger 5.5 V -8mA 9.7 ns @ 5 V, 15.4 ns @ 3.3 V 2 V 8mA
RS-stocknr. 798-9039
Fabrikantnummer74HC32S14-13
FabrikantDiodesZetex
€ 0,246
Each (In a Pack of 25)
Aantal stuks
OR Surface Mount 4 2 Yes SOIC 14 HC Schmitt Trigger 6 V -4mA 135 ns @ 50 pF 2 V 5.2mA
RS-stocknr. 146-0489
Fabrikantnummer74HCT1G08GW,125
FabrikantNexperia
€ 0,043
Each (On a Reel of 3000)
Aantal stuks
AND Surface Mount 1 2 No TSSOP 5 HCT TTL 5.5 V -2mA 27ns 4.5 V 2mA
RS-stocknr. 526-565
FabrikantnummerSN74HC08D
€ 0,312
Each (In a Tube of 50)
Aantal stuks
AND Surface Mount 4 2 No SOIC 14 HC - 6 V -5.2mA 17 ns @ 6 V, 20 ns @ 4.5 V, 100 ns @ 2 V 2 V 5.2mA
RS-stocknr. 217-5645
FabrikantnummerSN74HC32N
€ 0,48
Each
Aantal stuks
OR Through Hole 4 2 No PDIP 14 HC - 6 V -5.2mA 17 ns @ 6 V, 20 ns @ 4.5 V, 100 ns @ 2 V 2 V 5.2mA
RS-stocknr. 806-3927
FabrikantnummerMC74VHC1G00DFT1G
FabrikantON Semiconductor
€ 0,022
Each (On a Tape of 100)
Aantal stuks
NAND Surface Mount 1 2 No SC-88A 5 VHC CMOS 5.5 V -8mA 15.5 ns @ 50 pF 2 V 8mA
RS-stocknr. 663-1136
FabrikantnummerSN74AHC132D
€ 0,099
Each (In a Pack of 10)
Aantal stuks
NAND Surface Mount 4 2 Yes SOIC 14 AHC Schmitt Trigger 5.5 V -8mA 9.7 ns @ 5 V, 15.4 ns @ 3.3 V 2 V 8mA
RS-stocknr. 179-2125
FabrikantnummerSN74AC08DR
€ 0,289
Each (In a Tube of 50)
Aantal stuks
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
RS-stocknr. 162-6715
FabrikantnummerSN74LVC1G332DBVR
€ 0,071
Each (On a Reel of 3000)
Aantal stuks
OR Surface Mount 1 3 No SOT-23 6 LVC Differential 5.5 V -4mA 20 ns @ 50 pF 1.65 V 32mA
RS-stocknr. 822-8657
Fabrikantnummer74AHC1G08SE-7
FabrikantDiodesZetex
€ 0,012
Each (In a Pack of 200)
Aantal stuks
AND Surface Mount 1 2 Yes SOT-353 5 AHC Schmitt Trigger 5.5 V -8mA - 2 V 8mA
RS-stocknr. 162-4283
FabrikantnummerSN74AHCT1G32DBVR
€ 0,043
Each (On a Reel of 3000)
Aantal stuks
OR Surface Mount 1 2 No SOT-23 5 AHCT - 5.5 V -8mA 7.9 ns @ 5 V 4.5 V 8mA
RS-stocknr. 809-6006
FabrikantnummerSN74LVC1G332DBVR
€ 0,247
Each (In a Pack of 20)
Aantal stuks
OR Surface Mount 1 3 No SOT-23 6 LVC Differential 5.5 V -4mA 20 ns @ 50 pF 1.65 V 32mA
RS-stocknr. 162-7492
FabrikantnummerSN74LVC2G08DCTR
€ 0,17
Each (On a Reel of 3000)
Aantal stuks
AND Surface Mount 2 2 No SSOP 8 LVC - 5.5 V -32mA 3.8 ns @ 5 V, 4.7 ns @ 3.3 V 1.65 V 32mA
RS-stocknr. 165-8851
Fabrikantnummer74AHC1G08SE-7
FabrikantDiodesZetex
€ 0,016
Each (On a Reel of 3000)
Aantal stuks
AND Surface Mount 1 2 Yes SOT-353 5 AHC Schmitt Trigger 5.5 V -8mA - 2 V 8mA