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.

The RS components range offers semiconductor logic gates from leading brands, with input/output configurations to suit the demands of your digital circuit.

Types of Logic Gate

Logic gates have distinct logic functions. The most common of these are known as basic gates. These include:

• AND Gates. This gate has multiple inputs that are processed to a single signal 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. Like 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.

There are also logic gates referred to as Exclusive Gates.

• XNOR (EX-NOR) Gate. These gates process a high signal if all input signals are true, e.g: if there are two one signals or two zero signals.

• XOR Gate. Unlike an XNOR, XOR performs exclusive dis-junction, which means it will only output a true signal if exactly one of the inputs are true.

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. Though their essential functions remain unchanged, their implementations are many.

• Encoders
• Decoders
• Multiplexers
• Demultiplexers
• Full adders
• 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. 333-2748
Mfr. Part No.SN74HC00N
SGD0.501
Each (In a Tube of 25)
units
NAND 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. 527-514
Mfr. Part No.SN74HCT08N
SGD0.495
Each (In a Tube of 25)
units
AND Through Hole 4 2 No PDIP 14 HCT - 5.5 V -4mA 22 ns @ 5.5 V, 24 ns @ 4.5 V 4.5 V 4mA
RS Stock No. 166-2761
Mfr. Part No.MM74HC32MX
SGD0.295
Each (On a Reel of 2500)
units
OR Surface Mount 4 2 No SOIC 14 HC CMOS 6 V 5.2mA 125ns 2 V 5.2mA
RS Stock No. 761-4498
Mfr. Part No.MM74HC32MX
SGD0.669
Each (In a Pack of 25)
units
OR Surface Mount 4 2 No SOIC 14 HC CMOS 6 V 5.2mA 125ns 2 V 5.2mA
RS Stock No. 368-5884
Mfr. Part No.SN74LS00N
SGD1.332
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. 145-0402
Mfr. Part No.SN74HCT00N
SGD0.204
Each (In a Tube of 25)
units
NAND Through Hole 4 2 No PDIP 14 HCT - 5.5 V -4mA 18 ns @ 5.5 V, 20 ns @ 4.5 V 4.5 V 4mA
RS Stock No. 806-3217
Mfr. Part No.MC14070BDG
SGD0.354
Each (In a Pack of 55)
units
XOR Surface Mount 4 2 No SOIC 14 4000 - 18 V -10mA 150ns 3 V 10mA
RS Stock No. 662-8679
Mfr. Part No.SN74LVC1G00DCKT
SGD1.052
Each (In a Pack of 5)
units
NAND Surface Mount 1 2 No SC-70 5 LVC - 5.5 V -32mA 4 ns @ 5 V, 4.7 ns @ 3.3 V 1.65 V 32mA
RS Stock No. 100-0761
Mfr. Part No.SN74HC32N
SGD0.501
Each (In a Tube of 25)
units
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 Stock No. 170-3567
Mfr. Part No.MC14011BDR2G
SGD0.185
Each (On a Reel of 2500)
units
NAND Surface Mount 4 2 No SOIC 14 4000 - 18 V -10mA 250 ns @ 50 pF 3 V 10mA
RS Stock No. 168-4235
Mfr. Part No.SN74LVC1G00DCKR
SGD0.061
Each (On a Reel of 3000)
units
NAND Surface Mount 1 2 No SC-70 5 LVC CMOS, TTL 5.5 V -32mA 4.3 ns @ 5 V 1.65 V 32mA
RS Stock No. 518-8650
Mfr. Part No.MC14011BDG
SGD0.65
Each
units
NAND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 80 ns @ 15 V, 100 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS Stock No. 145-6124
Mfr. Part No.SN74LVC1G00DCKT
SGD0.512
Each (On a Reel of 250)
units
NAND Surface Mount 1 2 No SC-70 5 LVC - 5.5 V -32mA 4 ns @ 5 V, 4.7 ns @ 3.3 V 1.65 V 32mA
RS Stock No. 806-3119
Mfr. Part No.MC14011BDR2G
SGD0.257
Each (On a Tape of 50)
units
NAND Surface Mount 4 2 No SOIC 14 4000 - 18 V -10mA 250 ns @ 50 pF 3 V 10mA
RS Stock No. 103-2710
Mfr. Part No.MC14011BDG
SGD0.199
Each (In a Tube of 55)
units
NAND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 80 ns @ 15 V, 100 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS Stock No. 531-6726
Mfr. Part No.TC4071BF(F)
BrandToshiba
SGD0.752
Each (In a Pack of 10)
units
OR Surface Mount 4 2 No SOP 14 4000 - 18 V -4mA 80 ns @ 15 V, 100 ns @ 10 V, 200 ns @ 5 V 3 V 4mA
RS Stock No. 796-8228
Mfr. Part No.SN74LVC1G00DCKR
SGD0.263
Each (On a Tape of 50)
units
NAND Surface Mount 1 2 No SC-70 5 LVC CMOS, TTL 5.5 V -32mA 4.3 ns @ 5 V 1.65 V 32mA
RS Stock No. 739-0098
Mfr. Part No.NC7WZ16P6X
SGD0.306
Each (In a Pack of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 333-2849
Mfr. Part No.SN74HC132N
SGD0.442
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. 368-5569
Mfr. Part No.SN7400N
SGD1.817
Each (In a Tube of 25)
units
NAND Through Hole 4 2 No PDIP 14 74 - 5.25 V -0.4mA 22 ns @ 5 V 4.75 V 16mA
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