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. 809-6071
FabrikantnummerSN74LVC2G86DCUT
€ 0,264
Each (On a Tape of 10)
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. 145-0165
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
RS-stocknr. 170-5345
Fabrikantnummer74LVC32APW,118
FabrikantNexperia
€ 0,236
Each (In a Pack of 50)
Aantal stuks
OR Surface Mount 4 2 - TSSOP 14 74LVC TTL 3.6 V -24mA 10.4 ns @ 50 pF 1.2 V 24mA
RS-stocknr. 860-7306
FabrikantnummerM74HC132YTTR
€ 0,275
Each (In a Pack of 10)
Aantal stuks
NAND Surface Mount 4 2 Yes TSSOP 14 HC Schmitt Trigger 6 V -5.2mA 160 ns @ 50 pF 2 V -5.2mA
RS-stocknr. 162-7048
FabrikantnummerSN74AHC1G08DRLR
€ 0,088
Each (On a Reel of 4000)
Aantal stuks
AND Surface Mount 1 2 No SOT-553 5 AHC - 5.5 V -8mA 7.9 ns @ 5 V, 12.3 ns @ 3.3 V 2 V 8mA
RS-stocknr. 169-7484
Fabrikantnummer74LV86AT14-13
FabrikantDiodesZetex
€ 0,089
Each (On a Reel of 2500)
Aantal stuks
XOR Surface Mount 4 2 Yes TSSOP 14 LV Schmitt Trigger 5.5 V -12mA 11 ns @ 50 pF 2 V 12mA
RS-stocknr. 891-2784
FabrikantnummerTC7SH00FU(T5L,JF,T
FabrikantToshiba
€ 1,156
Each (In a Pack of 25)
Aantal stuks
NAND Surface Mount 1 2 No SSOP 5 VHS CMOS 5.5 V -8mA 13 ns @ 50 pF 2 V 8mA
RS-stocknr. 809-5306
FabrikantnummerSN74S260D
€ 1,046
Each (In a Pack of 5)
Aantal stuks
NOR Surface Mount 2 5 No SOIC 14 S Differential 5.25 V -1mA 6 ns @ 15 pF 4.75 V 20mA
RS-stocknr. 171-3159
FabrikantnummerTC7SZ86FU
FabrikantToshiba
€ 0,048
Each (In a Pack of 100)
Aantal stuks
XOR Surface Mount 1 2 - SOT-353 5 - CMOS 5.5 V -32mA 13.5 ns @ 15 pF 1.65 V 32mA
RS-stocknr. 178-9074
FabrikantnummerSN74HC20NE4
€ 0,237
Each (In a Tube of 25)
Aantal stuks
NAND 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. 751-2761
Fabrikantnummer74AHC1G08W5-7
FabrikantDiodesZetex
€ 0,072
Each (In a Pack of 100)
Aantal stuks
AND Surface Mount 1 2 Yes SOT-25 5 AHC Schmitt Trigger 5.5 V -8mA 10.5ns 2 V 4mA
RS-stocknr. 145-7375
FabrikantnummerSN74LVC2G00DCUT
€ 0,497
Each (On a Reel of 250)
Aantal stuks
NAND Surface Mount 2 2 No VSSOP 8 LVC - 5.5 V -32mA 3.3 ns @ 5 V, 4.3 ns @ 3.3 V 1.65 V 32mA
RS-stocknr. 145-0724
FabrikantnummerSN74LV20AD
€ 0,637
Each (In a Tube of 50)
Aantal stuks
NAND Surface Mount 2 4 No SOIC 14 LV - 5.5 V -12mA 7 ns @ 5 V, 10.1 ns @ 3.3 V, 15.3 ns @ 2.5 V 2 V 12mA
RS-stocknr. 171-3031
FabrikantnummerTC7SZ32FE
FabrikantToshiba
€ 0,043
Each (On a Reel of 4000)
Aantal stuks
OR Surface Mount 1 2 - SOT-553 5 - CMOS 5.5 V -32mA 11 ns @ 15 pF 1.65 V 32mA
RS-stocknr. 368-5569
FabrikantnummerSN7400N
€ 1,189
Each (In a Tube of 25)
Aantal stuks
NAND Through Hole 4 2 No PDIP 14 74 - 5.25 V -0.4mA 22 ns @ 5 V 4.75 V 16mA
RS-stocknr. 122-1482
Fabrikantnummer74LVC00AT14-13
FabrikantDiodesZetex
€ 0,08
Each (On a Reel of 2500)
Aantal stuks
NAND Surface Mount 4 2 - TSSOP 14 LVC CMOS 5.5 V -24mA 6.5 ns @ 2.7 V 1.65 V 24mA
Nieuw
RS-stocknr. 219-4275
Fabrikantnummer74HCT02D,653
FabrikantNexperia
€ 0,259
Each (In a Pack of 50)
Aantal stuks
NOR Surface Mount 4 2 No SO14 14 - - - - - - -
RS-stocknr. 162-9125
FabrikantnummerNL27WZ02USG
FabrikantON Semiconductor
€ 0,094
Each (On a Reel of 3000)
Aantal stuks
NOR Surface Mount 2 2 No US 8 NL LVTTL 5.5 V -32mA 5.2 ns @ 50 pF 1.65 V 32mA
RS-stocknr. 184-4250
FabrikantnummerMC14012BDG
FabrikantON Semiconductor
€ 0,095
Each (In a Tube of 55)
Aantal stuks
NAND Surface Mount 2 4 - SOIC 14 4000 CMOS 18 V -4.2mA 300 ns @ 50 pF -5 V 4.2mA
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