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. 145-6874
FabrikantnummerCD40107BM
€ 0,343
Each (In a Tube of 75)
Aantal stuks
NAND Surface Mount 2 2 No SOIC 8 4000 - 18 V - 100 ns @ 15 V, 120 ns @ 10 V, 200 ns @ 5 V 3 V 89mA
RS-stocknr. 527-669
FabrikantnummerSN74LVC1G32DBVR
€ 0,175
Each (In a Pack of 25)
Aantal stuks
OR Surface Mount 1 2 No SOT-23 5 LVC - 5.5 V -32mA 4 ns @ 5 V, 4.5 ns @ 3.3 V 1.65 V 32mA
RS-stocknr. 145-0152
FabrikantnummerCD74HC4002E
€ 0,387
Each (In a Tube of 25)
Aantal stuks
NOR Through Hole 2 4 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. 179-2161
FabrikantnummerSN74AHC32D
€ 0,253
Each (In a Tube of 50)
Aantal stuks
OR Surface Mount 4 2 No SOIC 14 AHC - 5.5 V -8mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V 2 V 8mA
RS-stocknr. 146-0953
FabrikantnummerULN2003V12T16-13
FabrikantDiodesZetex
€ 0,129
Each (On a Reel of 2500)
Aantal stuks
- Surface Mount - - - TSSOP 16 - CMOS 5 V - 140ns 3.3 V 140mA
RS-stocknr. 178-7004
FabrikantnummerHEF4070BT,652
FabrikantNexperia
€ 0,278
Each (In a Tube of 57)
Aantal stuks
OR Surface Mount 4 2 No SOIC 14 4000 CMOS 15 V - 50 ns @ 15 V 5 V -
RS-stocknr. 807-2375
FabrikantnummerCD4068BM
€ 0,332
Each (In a Pack of 50)
Aantal stuks
AND/NAND Surface Mount 1 8 No SOIC 14 4000 CMOS 18 V -6.8mA 300 ns @ 50 pF 3 V 6.8mA
RS-stocknr. 663-1102
FabrikantnummerSN74AHC00D
€ 0,291
Each (In a Pack of 10)
Aantal stuks
NAND Surface Mount 4 2 No SOIC 14 AHC - 5.5 V -8mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V 2 V 8mA
RS-stocknr. 121-9223
FabrikantnummerSN74LVC2G32DCTR
€ 0,223
Each (On a Reel of 3000)
Aantal stuks
OR Surface Mount 2 2 - SSOP 8 LVC - 5.5 V -32mA 3.2 ns @ 5 V, 3.8 ns @ 3.3 V 1.65 V 32mA
RS-stocknr. 662-8950
FabrikantnummerSN74LVC2G32DCTR
€ 0,382
Each (In a Pack of 5)
Aantal stuks
OR Surface Mount 2 2 No SSOP 8 LVC - 5.5 V -32mA 3.2 ns @ 5 V, 3.8 ns @ 3.3 V 1.65 V 32mA
RS-stocknr. 368-5884
FabrikantnummerSN74LS00N
€ 0,494
Each (In a Tube of 25)
Aantal stuks
NAND Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 15 ns @ 5 V 4.75 V 8mA
RS-stocknr. 178-8963
FabrikantnummerSN74LVC1G32DBVR
€ 0,08
Each (On a Reel of 3000)
Aantal stuks
OR Surface Mount 1 2 No SOT-23 5 LVC - 5.5 V -32mA 4 ns @ 5 V, 4.5 ns @ 3.3 V 1.65 V 32mA
RS-stocknr. 145-1067
FabrikantnummerSN74ACT10D
€ 0,471
Each (In a Tube of 50)
Aantal stuks
NAND Surface Mount 3 3 No SOIC 14 ACT - 5.5 V -24mA 9 ns @ 5 V 4.5 V 24mA
RS-stocknr. 663-1170
FabrikantnummerSN74AHC32D
€ 0,259
Each (In a Pack of 10)
Aantal stuks
OR Surface Mount 4 2 No SOIC 14 AHC - 5.5 V -8mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V 2 V 8mA
RS-stocknr. 662-9512
FabrikantnummerCD40107BM
€ 0,464
Each (In a Pack of 5)
Aantal stuks
NAND Surface Mount 2 2 No SOIC 8 4000 - 18 V - 100 ns @ 15 V, 120 ns @ 10 V, 200 ns @ 5 V 3 V 89mA
RS-stocknr. 663-0297
FabrikantnummerCD74HC4002E
€ 0,482
Each (In a Pack of 5)
Aantal stuks
NOR Through Hole 2 4 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. 144-9955
FabrikantnummerCD74HCT132E
€ 0,261
Each (In a Tube of 25)
Aantal stuks
NAND Through Hole 4 2 Yes PDIP 14 HCT Schmitt Trigger 5.5 V -4mA 33 ns @ 4.5 V 4.5 V 4mA
RS-stocknr. 179-2159
FabrikantnummerSN74AHC00D
€ 0,285
Each (In a Tube of 50)
Aantal stuks
NAND Surface Mount 4 2 No SOIC 14 AHC - 5.5 V -8mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V 2 V 8mA
RS-stocknr. 112-6276
Fabrikantnummer74HC86D,652
FabrikantNexperia
€ 0,33
Each
Aantal stuks
XOR Surface Mount 4 2 No SOIC 14 HC - 6 V -5.2mA 20 ns @ 6 V, 24 ns @ 4.5 V, 120 ns @ 2 V 2 V 5.2mA
RS-stocknr. 802-1342
Fabrikantnummer74VHC08M
FabrikantON Semiconductor
€ 0,442
Each (In a Tube of 55)
Aantal stuks
AND Surface Mount 4 2 No SOIC 14 VHC - 5.5 V -8mA 14 ns @ 50 pF 2 V 8mA