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. 124-2313
Mfr. Part No.HEF4093BT,652
BrandNexperia
R 3.866
Each (In a Tube of 57)
units
NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 15 V -4.2mA 60 ns @ 15 V, 80 ns @ 10 V, 185 ns @ 5 V 3 V 4.2mA
RS stock no. 662-8922
Mfr. Part No.SN74LVC2G132DCUT
R 13.482
Each (In a Pack of 5)
units
NAND Surface Mount 2 2 Yes VSSOP 8 LVC Schmitt Trigger 5.5 V -32mA 5 ns @ 5 V, 6 ns @ 3.3 V 1.65 V 32mA
RS stock no. 162-6972
Mfr. Part No.CD74HCT21M96
R 1.697
Each (On a Reel of 2500)
units
AND Surface Mount 2 4 No SOIC 14 HCT - 5.5 V -4mA 27 ns @ 4.5 V 4.5 V 4mA
RS stock no. 170-7964
Mfr. Part No.HEF4093BT,653
BrandNexperia
R 1.88
Each (On a Reel of 2500)
units
NAND Surface Mount 4 2 Yes SO 14 HEF Schmitt Trigger 15 V -4.2mA 185 ns @ 50 pF 3 V 4.2mA
RS stock no. 355-9167
Mfr. Part No.HEF4093BT,652
BrandNexperia
R 8.10
Each
units
NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 15 V -4.2mA 60 ns @ 15 V, 80 ns @ 10 V, 185 ns @ 5 V 3 V 4.2mA
RS stock no. 923-2322
Mfr. Part No.SN74LS02N
R 9.265
Each (In a Tube of 25)
units
NOR Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 15 ns @ 5 V 4.75 V 8mA
RS stock no. 166-2410
Mfr. Part No.NC7SZ00M5X
R 1.308
Each (On a Reel of 3000)
units
NAND Surface Mount 1 2 No SOT-23 5 TinyLogic UHS CMOS 5.5 V -32mA 5.2ns 1.65 V 32mA
RS stock no. 170-8003
Mfr. Part No.74HC125D,653
BrandNexperia
R 1.469
Each (On a Reel of 2500)
units
Buffer, Line Driver Surface Mount - - - SO 14 74HC CMOS 6 V -7.8mA 150 ns @ 50 pF 2 V 7.8mA
RS stock no. 443-025
Mfr. Part No.SN74HC132N
R 7.77
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. 663-1916
Mfr. Part No.SN74HC132PW
R 3.125
Each (In a Pack of 10)
units
NAND Surface Mount 4 2 Yes TSSOP 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. 805-1570
Mfr. Part No.M74VHC1GT86DFT2G
R 0.469
Each (In a Pack of 100)
units
XOR Surface Mount 1 2 No SC-88A 5 VHC TTL 5.5 V -8mA 19.5 ns @ 50 pF 3 V 8mA
RS stock no. 113-0528
Mfr. Part No.74HC125D,652
BrandNexperia
R 7.04
Each
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. 806-3223
Mfr. Part No.MC14073BDG
R 6.737
Each (In a Pack of 55)
units
AND Surface Mount 3 3 No SOIC 14 4000 - 18 V -10mA 300 ns @ 50 pF 3 V 10mA
RS stock no. 662-8673
Mfr. Part No.SN74LVC1G02DBVT
R 11.592
Each (In a Pack of 5)
units
NOR Surface Mount 1 2 No SOT-23 5 LVC - 5.5 V -32mA 4 ns @ 5 V, 4.5 ns @ 3.3 V 1.65 V 32mA
RS stock no. 816-8750
Mfr. Part No.74LVC1G08GV,125
BrandNexperia
R 1.075
Each (In a Pack of 100)
units
AND Surface Mount 1 2 No SC-74A 5 LVC CMOS 5.5 V -32mA 7 ns @ 50 pF 1.65 V 32mA
RS stock no. 761-4561
Mfr. Part No.NC7SZ86M5X
R 4.498
Each (In a Pack of 25)
units
OR Surface Mount 1 2 No SOT-23 5 - CMOS 5.5 V -32mA 6.5ns 1.65 V 32mA
RS stock no. 145-5993
Mfr. Part No.SN74LVC1G02DBVT
R 6.259
Each (On a Reel of 250)
units
NOR Surface Mount 1 2 No SOT-23 5 LVC - 5.5 V -32mA 4 ns @ 5 V, 4.5 ns @ 3.3 V 1.65 V 32mA
RS stock no. 662-8994
Mfr. Part No.SN74LVC32ADR
R 4.984
Each (In a Pack of 10)
units
OR Surface Mount 4 2 No SOIC 14 LVC - 3.6 V -24mA 3.6 ns @ 3.3 V, 4.2 ns @ 2.7 V 1.65 V 24mA
RS stock no. 145-3638
Mfr. Part No.M74VHC1GT14DFT2G
R 0.384
Each (On a Reel of 3000)
units
Inverter Surface Mount 1 - - SC-70 5 VHC LS-TTL 5.5 V -8mA 20.5 ns @ 50 pF 3 V 8mA
RS stock no. 663-1815
Mfr. Part No.SN74F21D
R 4.444
Each (In a Pack of 5)
units
AND Surface Mount 2 4 No SOIC 14 F - 5.5 V -1mA 5.1 ns @ 5 V 4.5 V 20mA