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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Description Price 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 Stock No. 923-6801
Mfr. Part No.CD4011UBE
PHP23.972
Each (In a Tube of 25)
units
NAND Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 50 ns @ 15 V, 60 ns @ 10 V, 120 ns @ 5 V 3 V 4.2mA
RS Stock No. 709-2968
Mfr. Part No.CD4011UBE
PHP23.972
Each (In a Pack of 10)
units
NAND Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 50 ns @ 15 V, 60 ns @ 10 V, 120 ns @ 5 V 3 V 4.2mA
RS Stock No. 526-486
Mfr. Part No.SN74HC132DR
PHP16.674
Each (In a Pack of 25)
units
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 Stock No. 662-6819
Mfr. Part No.CD4011BM96
PHP19.446
Each (In a Pack of 10)
units
NAND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 90 ns @ 15 V, 120 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS Stock No. 179-2116
Mfr. Part No.CD4011BM96
PHP19.446
Each (In a Tube of 50)
units
NAND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 90 ns @ 15 V, 120 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS Stock No. 663-1906
Mfr. Part No.SN74HC11NE4
PHP17.728
Each (In a Pack of 10)
units
AND Through Hole 3 3 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 Stock No. 923-2341
Mfr. Part No.SN74LS32N
PHP31.542
Each (In a Tube of 25)
units
OR Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 22 ns @ 5 V 4.75 V 8mA
RS Stock No. 333-2849
Mfr. Part No.SN74HC132N
PHP21.504
Each (In a Tube of 25)
units
NAND Through Hole 4 2 Yes PDIP 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 Stock No. 443-025
Mfr. Part No.SN74HC132N
PHP25.21
Each
units
NAND Through Hole 4 2 Yes PDIP 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 Stock No. 144-9972
Mfr. Part No.SN74HC11NE4
PHP11.259
Each (In a Tube of 25)
units
AND Through Hole 3 3 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 Stock No. 100-0760
Mfr. Part No.SN74HC08N
PHP21.129
Each (In a Tube of 25)
units
AND 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 Stock No. 145-0150
Mfr. Part No.CD74HC21E
PHP20.559
Each (In a Tube of 25)
units
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 Stock No. 709-3021
Mfr. Part No.CD74HC32E
PHP32.917
Each (In a Pack of 10)
units
OR Through Hole 4 2 No PDIP 14 HC - 6 V -5.2mA 15 ns @ 6 V, 18 ns @ 4.5 V, 90 ns @ 2 V 2 V 5.2mA
RS Stock No. 368-5884
Mfr. Part No.SN74LS00N
PHP56.59
Each (In a Tube of 25)
units
NAND Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 15 ns @ 5 V 4.75 V 8mA
RS Stock No. 145-0485
Mfr. Part No.CD74HC32E
PHP27.836
Each (In a Tube of 25)
units
OR Through Hole 4 2 No PDIP 14 HC - 6 V -5.2mA 15 ns @ 6 V, 18 ns @ 4.5 V, 90 ns @ 2 V 2 V 5.2mA
RS Stock No. 179-2175
Mfr. Part No.SN74LS08D
PHP35.88
Each (In a Tube of 50)
units
AND Surface Mount 4 2 No SOIC 14 LS - 5.25 V -0.4mA 20 ns @ 5 V 4.75 V 8mA
RS Stock No. 663-2375
Mfr. Part No.SN74LS08D
PHP39.744
Each (In a Pack of 5)
units
AND Surface Mount 4 2 No SOIC 14 LS - 5.25 V -0.4mA 20 ns @ 5 V 4.75 V 8mA
RS Stock No. 922-2909
Mfr. Part No.CD4093BM
PHP20.641
Each (In a Tube of 50)
units
NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 18 V -4.2mA 130 ns @ 15 V, 180 ns @ 10 V, 380 ns @ 5 V 3 V 4.2mA
RS Stock No. 663-2224
Mfr. Part No.SN74HC86D
PHP17.06
Each (In a Pack of 10)
units
XOR 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 Stock No. 662-9676
Mfr. Part No.CD4093BM
PHP28.348
Each (In a Pack of 5)
units
NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 18 V -4.2mA 130 ns @ 15 V, 180 ns @ 10 V, 380 ns @ 5 V 3 V 4.2mA