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. 145-0660
Mfr. Part No.CD4011UBM
HK$2.585
Each (In a Tube of 50)
units
NAND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 50 ns @ 15 V, 60 ns @ 10 V, 120 ns @ 5 V 3 V 4.2mA
RS Stock No. 165-8730
Mfr. Part No.74LVC2G32DC,125
BrandNexperia
HK$2.003
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. 166-1278
Mfr. Part No.74LVC132AD,112
BrandNexperia
HK$2.403
Each (In a Tube of 57)
units
NAND Surface Mount 4 2 Yes SOIC 14 LVC Schmitt Trigger 3.6 V -24mA - 1.2 V 24mA
RS Stock No. 662-8714
Mfr. Part No.SN74LVC1G08QDCKRQ1
HK$2.026
Each (In a Pack of 10)
units
AND Surface Mount 1 2 No SC-70 5 LVC - 5.5 V -32mA 6 ns @ 5 V, 6.5 ns @ 3.3 V 1.65 V 32mA
RS Stock No. 103-2926
Mfr. Part No.MC14093BDG
HK$2.535
Each (In a Tube of 55)
units
NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 18 V -4.2mA 80 ns @ 15 V, 100 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS Stock No. 518-8616
Mfr. Part No.MC14001BDG
HK$3.92
Each
units
NOR 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. 162-6947
Mfr. Part No.CD74HC30PWR
HK$0.91
Each (On a Reel of 2000)
units
NAND Surface Mount 1 8 No TSSOP 14 HC - 6 V -5.2mA 22 ns @ 6 V, 26 ns @ 4.5 V, 130 ns @ 2 V 2 V 5.2mA
RS Stock No. 663-0486
Mfr. Part No.CD74HCT132M
HK$4.37
Each (In a Pack of 5)
units
NAND Surface Mount 4 2 Yes SOIC 14 HCT Schmitt Trigger 5.5 V -4mA 33 ns @ 4.5 V 4.5 V 4mA
RS Stock No. 663-1874
Mfr. Part No.SN74HC02D
HK$2.266
Each (In a Pack of 10)
units
NOR 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. 162-9388
Mfr. Part No.MC14001BDR2G
HK$1.02
Each (On a Reel of 2500)
units
NOR Surface Mount 4 2 No SOIC 14 4000 CMOS 18 V -4.2mA 350ns 0.5 V 4.2mA
RS Stock No. 526-470
Mfr. Part No.CD4093BM96
HK$2.408
Each (In a Pack of 25)
units
NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 18 V -4.2mA 130 ns @ 15 V, 180 ns @ 10 V, 380 ns @ 5 V 3 V 4.2mA
RS Stock No. 688-1530
Mfr. Part No.MC14093BDR2G
HK$3.156
Each (In a Pack of 5)
units
NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 18 V -4.2mA 80 ns @ 15 V, 100 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS Stock No. 761-4334
Mfr. Part No.74LCX08MX
HK$2.976
Each (On a Tape of 10)
units
AND Surface Mount 4 2 No SOIC 14 LCX CMOS 3.6 V -24mA 6.2ns 2 V 24mA
RS Stock No. 166-1852
Mfr. Part No.74LCX08M
HK$1.60
Each (In a Tube of 55)
units
AND Surface Mount 4 2 No SOIC 14 LCX - 3.6 V -24mA 5.5 ns @ 3.3 V, 6.2 ns @ 2.7 V 2 V 24mA
RS Stock No. 923-2357
Mfr. Part No.SN74LS86AN
HK$3.957
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. 662-7535
Mfr. Part No.SN74AC00DR
HK$3.105
Each (In a Pack of 10)
units
NAND Surface Mount 4 2 No SOIC 14 AC - 6 V -24mA 8 ns @ 5 V, 9.5 ns @ 3.3 V 2 V 24mA
RS Stock No. 169-8532
Mfr. Part No.NC7SZ08M5X
HK$0.536
Each (On a Reel of 3000)
units
AND Surface Mount 1 2 No SOT-23 5 TinyLogic UHS - 5.5 V -32mA 4.5 ns @ 5 V, 5.2 ns @ 3.3 V 1.65 V 32mA
RS Stock No. 113-0130
Mfr. Part No.74HC32D,652
BrandNexperia
HK$10.86
Each
units
OR 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. 162-7461
Mfr. Part No.SN74LVC1G08QDCKRQ1
HK$0.756
Each (On a Reel of 3000)
units
AND Surface Mount 1 2 No SC-70 5 LVC - 5.5 V -32mA 6 ns @ 5 V, 6.5 ns @ 3.3 V 1.65 V 32mA
RS Stock No. 146-0953
Mfr. Part No.ULN2003V12T16-13
HK$1.093
Each (On a Reel of 2500)
units
- Surface Mount - - - TSSOP 16 - CMOS 5 V - 140ns 3.3 V 140mA