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 Prix 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
N° de stock RS 171-3016
Référence fabricantTC7SZ00FE
MarqueToshiba
0,047 €
Each (On a Reel of 4000)
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NAND Surface Mount 1 2 - SOT-553 5 - CMOS 5.5 V -32mA 11 ns @ 15 pF 1.65 V 32mA
N° de stock RS 171-3317
Référence fabricant74VHC132FT
MarqueToshiba
0,07 €
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NAND Surface Mount 4 2 Yes TSSOP 14 74VHC CMOS, Schmitt Trigger 5.5 V -8mA 19.5 ns @ 50 pF 2 V 8mA
N° de stock RS 171-3031
Référence fabricantTC7SZ32FE
MarqueToshiba
0,047 €
Each (On a Reel of 4000)
Unité
OR Surface Mount 1 2 - SOT-553 5 - CMOS 5.5 V -32mA 11 ns @ 15 pF 1.65 V 32mA
N° de stock RS 171-3017
Référence fabricantTC7SZ02FE
MarqueToshiba
0,069 €
Each (On a Reel of 4000)
Unité
NOR Surface Mount 1 2 - SOT-553 5 - CMOS 5.5 V -32mA 11 ns @ 15 pF 1.65 V 32mA
N° de stock RS 171-3385
Référence fabricant74HC21D
MarqueToshiba
0,164 €
Each (On a Reel of 2500)
Unité
AND Surface Mount 2 4 - SOIC 14 74HC - 6 V -5.2mA 125 ns @ 50 pF 2 V 5.2mA
N° de stock RS 144-5322
Référence fabricantTC7SH08FU,LJ(CT
MarqueToshiba
0,081 €
Each (In a Pack of 100)
Unité
AND Surface Mount 1 2 - SOT-353 5 CMOS CMOS 5.5 V dc - 15.5 ns @ 50 pF 2 V dc -
N° de stock RS 171-3393
Référence fabricant74LCX00FT
MarqueToshiba
0,072 €
Each (In a Pack of 50)
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NAND Surface Mount 4 2 - TSSOP 14 74LCX CMOS 3.6 V -24mA 22 ns @ 50 pF 1.65 V 24mA
N° de stock RS 171-3042
Référence fabricantTC7WH02FU
MarqueToshiba
0,059 €
Each (On a Reel of 3000)
Unité
NOR Surface Mount 2 2 - SOT-505 8 - CMOS 5.5 V -8mA 13 ns @ 50 pF 2 V 8mA
N° de stock RS 891-2784
Référence fabricantTC7SH00FU(T5L,JF,T
MarqueToshiba
1,156 €
Each (In a Pack of 25)
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NAND Surface Mount 1 2 No SSOP 5 VHS CMOS 5.5 V -8mA 13 ns @ 50 pF 2 V 8mA
N° de stock RS 171-3150
Référence fabricantTC7SH09F
MarqueToshiba
0,036 €
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AND Surface Mount 1 2 - SOT-25 5 - CMOS 5.5 V - 14 ns @ 50 pF 2 V 8mA
N° de stock RS 171-3372
Référence fabricant74HC00D
MarqueToshiba
0,083 €
Each (On a Reel of 2500)
Unité
NAND Surface Mount 4 2 - SOIC 14 74HC - 6 V -5.2mA 135 ns @ 50 pF 2 V 5.2mA
N° de stock RS 171-3134
Référence fabricantTC7SZ86F
MarqueToshiba
0,036 €
Each (In a Pack of 50)
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XOR Surface Mount 1 2 - SOT-25 5 - CMOS 5.5 V -32mA 13.5 ns @ 15 pF 1.65 V 32mA
N° de stock RS 171-3413
Référence fabricant74LCX02FT
MarqueToshiba
0,066 €
Each (In a Pack of 50)
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NOR Surface Mount 4 2 - TSSOP 14 74LCX CMOS 3.6 V -24mA 22 ns @ 50 pF 1.65 V 24mA
N° de stock RS 171-3594
Référence fabricant74VHC08FT
MarqueToshiba
0,241 €
Each (In a Pack of 50)
Unité
AND Surface Mount 4 2 - TSSOP 14 74VHC CMOS, TTL 5.5 V -8mA 15.5 ns @ 50 pF 2 V 8mA
N° de stock RS 891-2850
Référence fabricantTC7WH32FK(TE85L,F)
MarqueToshiba
0,30 €
Each (In a Pack of 10)
Unité
OR Surface Mount 1 2 No SSOP 8 - CMOS 5.5 V -8mA 13 ns @ 50 pF 2 V 8mA
N° de stock RS 171-3179
Référence fabricantTC7SZ00FE
MarqueToshiba
0,048 €
Each (In a Pack of 100)
Unité
NAND Surface Mount 1 2 - SOT-553 5 - CMOS 5.5 V -32mA 11 ns @ 15 pF 1.65 V 32mA
N° de stock RS 171-3328
Référence fabricant74VHC20FT
MarqueToshiba
0,084 €
Each (On a Reel of 2500)
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NAND Surface Mount 2 4 - TSSOP 14 74VHC CMOS, TTL 5.5 V -8mA 13 ns @ 50 pF 2 V 8mA
N° de stock RS 171-3337
Référence fabricant74VHC27FT
MarqueToshiba
0,07 €
Each (On a Reel of 2500)
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NOR Surface Mount 3 3 - TSSOP 14 74VHC CMOS, TTL 5.5 V -8mA 15.5 ns @ 50 pF 2 V 8mA
N° de stock RS 171-3088
Référence fabricantTC7SZ32FE
MarqueToshiba
0,048 €
Each (In a Pack of 100)
Unité
OR Surface Mount 1 2 - SOT-553 5 - CMOS 5.5 V -32mA 11 ns @ 15 pF 1.65 V 32mA
N° de stock RS 171-3013
Référence fabricantTC7SH09FU
MarqueToshiba
0,035 €
Each (On a Reel of 3000)
Unité
AND Surface Mount 1 2 - SOT-353 5 - CMOS 5.5 V - 14 ns @ 50 pF 2 V 8mA