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. 709-2968
Mfr. Part No.CD4011UBE
kr 3,519
Each (In a Pack of 10)
Units
NAND Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 120 ns @ 5 V, 50 ns @ 15 V, 60 ns @ 10 V 3 V 4.2mA
RS Stock No. 923-6801
Mfr. Part No.CD4011UBE
kr 3,525
Each (In a Tube of 25)
Units
NAND Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 120 ns @ 5 V, 50 ns @ 15 V, 60 ns @ 10 V 3 V 4.2mA
RS Stock No. 217-5702
Mfr. Part No.SN74HCT00N
kr 4,39
Each
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. 145-0402
Mfr. Part No.SN74HCT00N
kr 3,003
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. 662-6853
Mfr. Part No.CD4070BM96
kr 2,792
Each (In a Pack of 10)
Units
XOR Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 100 ns @ 15 V, 130 ns @ 10 V, 280 ns @ 5 V 3 V 4.2mA
RS Stock No. 816-8820
Mfr. Part No.74LVC2G32DC,125
BrandNexperia
kr 2,931
Each (In a Pack of 10)
Units
OR Surface Mount 2 2 No VSSOP 8 LVC TTL 5.5 V -32mA 6 ns @ 50 pF 1.65 V 32mA
RS Stock No. 709-2185
Mfr. Part No.CD4070BM
kr 3,899
Each (In a Pack of 20)
Units
XOR Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 100 ns @ 15 V, 130 ns @ 10 V, 280 ns @ 5 V 3 V 4.2mA
RS Stock No. 165-8730
Mfr. Part No.74LVC2G32DC,125
BrandNexperia
kr 2,607
Each (On a Reel of 3000)
Units
OR Surface Mount 2 2 No VSSOP 8 LVC TTL 5.5 V -32mA 6 ns @ 50 pF 1.65 V 32mA
RS Stock No. 162-8903
Mfr. Part No.M74VHC1GT08DTT1G
kr 0,459
Each (On a Reel of 3000)
Units
AND Surface Mount 1 2 No TSOP 5 VHC TTL 5.5 V -8mA 16.5 ns @ 50 pF 3 V 8mA
RS Stock No. 145-1087
Mfr. Part No.CD4070BM
kr 3,172
Each (In a Tube of 50)
Units
XOR Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 100 ns @ 15 V, 130 ns @ 10 V, 280 ns @ 5 V 3 V 4.2mA
RS Stock No. 739-5188
Mfr. Part No.NC7SZ57P6X
kr 2,323
Each (In a Pack of 10)
Units
Multifunction Surface Mount 2 2 Yes SC-70 6 TinyLogic UHS Schmitt Trigger 5.5 V -32mA 6.5ns 1.65 V 32mA
RS Stock No. 166-2414
Mfr. Part No.NC7SZ57P6X
kr 0,561
Each (On a Reel of 3000)
Units
Multifunction Surface Mount 2 2 Yes SC-70 6 TinyLogic UHS Schmitt Trigger 5.5 V -32mA 6.5ns 1.65 V 32mA
RS Stock No. 791-8841
Mfr. Part No.HEF4070BT,652
BrandNexperia
kr 2,723
Each (In a Pack of 38)
Units
OR Surface Mount 4 2 No SOIC 14 4000 CMOS 15 V - 50 ns @ 15 V 5 V -
RS Stock No. 805-1539
Mfr. Part No.M74VHC1GT08DTT1G
kr 0,856
Each (On a Tape of 100)
Units
AND Surface Mount 1 2 No TSOP 5 VHC TTL 5.5 V -8mA 16.5 ns @ 50 pF 3 V 8mA
RS Stock No. 178-7004
Mfr. Part No.HEF4070BT,652
BrandNexperia
kr 3,029
Each (In a Tube of 57)
Units
OR Surface Mount 4 2 No SOIC 14 4000 CMOS 15 V - 50 ns @ 15 V 5 V -
RS Stock No. 162-6924
Mfr. Part No.CD4070BM96
kr 1,145
Each (On a Reel of 2500)
Units
XOR Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 100 ns @ 15 V, 130 ns @ 10 V, 280 ns @ 5 V 3 V 4.2mA
RS Stock No. 923-2335
Mfr. Part No.SN74LS08N
kr 4,638
Each (In a Tube of 25)
Units
AND Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 20 ns @ 5 V 4.75 V 8mA
RS Stock No. 170-7969
Mfr. Part No.74HC00D,653
BrandNexperia
kr 0,538
Each (On a Reel of 2500)
Units
NAND Surface Mount 4 2 - SO 14 74HC CMOS 6 V -5.2mA 135 ns @ 50 pF 2 V 5.2mA
RS Stock No. 103-8171
Mfr. Part No.74HC125D,652
BrandNexperia
kr 2,192
Each (In a Tube of 57)
Units
Buffer, Line Driver Surface Mount - - No SOIC 14 HC Single Ended 6 V -7.8mA 100 ns @ 2 V 2 V 7.8mA
RS Stock No. 124-2313
Mfr. Part No.HEF4093BT,652
BrandNexperia
kr 3,192
Each (In a Tube of 57)
Units
NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 15 V -4.2mA 185 ns @ 5 V, 60 ns @ 15 V, 80 ns @ 10 V 3 V 4.2mA
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