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. 169-5662
Mfr. Part No.SN74AHC1G00DCKT
R 6.475
Each (On a Reel of 250)
units
NAND Surface Mount 1 2 No SC-70 5 AHC - 5.5 V -8mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V 2 V 8mA
RS stock no. 165-8686
Mfr. Part No.74LV132AS14-13
R 1.659
Each (On a Reel of 2500)
units
NAND Surface Mount 4 2 Yes SOIC 14 LV Schmitt Trigger 5.5 V -12mA 11 ns @ 50 pF 2 V 12mA
RS stock no. 528-309
Mfr. Part No.SN74AHCT1G08DCKR
R 4.091
Each (In a Pack of 25)
units
AND Surface Mount 1 2 No SC-70 5 AHCT - 5.5 V -8mA 7.9 ns @ 5 V 4.5 V 8mA
RS stock no. 662-9474
Mfr. Part No.CD4001BM
R 6.667
Each (In a Pack of 10)
units
NOR 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. 809-6223
Mfr. Part No.CD4075BPW
R 2.366
Each (In a Pack of 15)
units
OR Surface Mount 3 3 No TSSOP 14 4000 Differential 18 V -4.2mA 250 ns @ 50 pF 3 V 4.2mA
RS stock no. 145-6124
Mfr. Part No.SN74LVC1G00DCKT
R 6.422
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. 163-0471
Mfr. Part No.MC100EP01DTG
R 92.723
Each (In a Tube of 100)
units
OR/NOR Surface Mount 1 4 No TSSOP 8 EP ECL 5.5 V - 350ps -3 V 0.5µA
RS stock no. 802-1588
Mfr. Part No.NL17SZ08DFT2G
R 1.02
Each (On a Tape of 200)
units
AND Surface Mount 1 2 No SC-88A 5 - - 5.5 V -32mA 12.7 ns @ 15 pF 1.65 V 32mA
RS stock no. 186-8710
Mfr. Part No.NC7NZ04K8X
R 4.88
Each (In a Pack of 25)
units
Inverter Surface Mount - - - US 8 - CMOS 5.5 V -32mA 5 ns @ 50 pF 1.65 V 32mA
RS stock no. 796-8209
Mfr. Part No.SN74HCT00D
R 6.321
Each (In a Pack of 25)
units
NAND Surface Mount 4 2 No SOIC 14 HCT TTL 5.5 V -4mA 22 ns @ 5.5 V 4.5 V 4mA
RS stock no. 145-0767
Mfr. Part No.CD4068BPW
R 6.547
Each (In a Tube of 90)
units
AND/NAND Surface Mount 1 8 No TSSOP 14 4000 Differential 18 V -4.2mA 300 ns @ 50 pF 3 V 4.2mA
RS stock no. 162-6710
Mfr. Part No.SN74LVC1G27DBVR
R 1.409
Each (On a Reel of 3000)
units
NOR Surface Mount 1 3 No SOT-23 6 LVC Differential 5.5 V -4mA 20.5 ns @ 50 pF 1.65 V 32mA
RS stock no. 186-8340
Mfr. Part No.MC74LCX08DG
R 6.124
Each (In a Pack of 25)
units
AND Surface Mount 4 2 - SOIC 14 LCX TTL 3.6 V -24mA 6.2 ns @ 50 pF 2.3 V 24mA
RS stock no. 806-3885
Mfr. Part No.MC74VHC02DTR2G
R 4.954
Each (In a Pack of 50)
units
NOR Surface Mount 4 2 No TSSOP 14 VHC CMOS 5.5 V -8mA 13 ns @ 50 pF 2 V 8mA
RS stock no. 923-2357
Mfr. Part No.SN74LS86AN
R 8.66
Each (In a Tube of 25)
units
XOR Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 30 ns @ 5 V 4.75 V 8mA
RS stock no. 662-6976
Mfr. Part No.CD74HC00M96
R 4.798
Each (In a Pack of 10)
units
NAND Surface Mount 4 2 No SOIC 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. 663-0297
Mfr. Part No.CD74HC4002E
R 8.488
Each (In a Pack of 5)
units
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 stock no. 527-069
Mfr. Part No.CD4070BE
R 7.434
Each (In a Tube of 25)
units
XOR Through Hole 4 2 No PDIP 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. 169-7483
Mfr. Part No.74LV86AS14-13
R 1.623
Each (On a Reel of 2500)
units
XOR Surface Mount 4 2 Yes SOIC 14 LV Schmitt Trigger 5.5 V -12mA 11 ns @ 50 pF 2 V 12mA
RS stock no. 145-0010
Mfr. Part No.CD4019BE
R 3.947
Each (In a Tube of 25)
units
AND/OR Through Hole 4 2 No PDIP 16 4000 - 18 V -4.2mA 100 ns @ 15 V, 120 ns @ 10 V, 300 ns @ 5 V 3 V 4.2mA