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. 179-2116
Mfr. Part No.CD4011BM96
HK$3.921
Each (In a Tube of 50)
units
NAND 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. 170-7993
Mfr. Part No.HEF4011BT,653
BrandNexperia
HK$1.208
Each (On a Reel of 2500)
units
NAND Surface Mount 4 2 - SO 14 HEF CMOS 15 V -4.2mA 110 ns @ 50 pF 3 V 4.2mA
RS Stock No. 662-7535
Mfr. Part No.SN74AC00DR
HK$3.512
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. 662-9521
Mfr. Part No.CD4011UBM
HK$2.803
Each (In a Pack of 10)
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. 103-8153
Mfr. Part No.HEF4011BT,652
BrandNexperia
HK$3.438
Each (In a Tube of 57)
units
NAND Surface Mount 4 2 No SOIC 14 4000 - 15 V -3.6mA 35 ns @ 15 V, 45 ns @ 10 V, 110 ns @ 5 V 3 V 3.6mA
RS Stock No. 518-9192
Mfr. Part No.MC14093BDG
HK$3.59
Each
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. 922-2909
Mfr. Part No.CD4093BM
HK$3.922
Each (In a Tube of 50)
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. 662-6819
Mfr. Part No.CD4011BM96
HK$3.477
Each (In a Pack of 10)
units
NAND 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. 662-8887
Mfr. Part No.SN74LVC2G00DCUT
HK$7.406
Each (In a Pack of 5)
units
NAND Surface Mount 2 2 No VSSOP 8 LVC - 5.5 V -32mA 3.3 ns @ 5 V, 4.3 ns @ 3.3 V 1.65 V 32mA
RS Stock No. 145-0164
Mfr. Part No.SN74AHC08D
HK$2.753
Each (In a Tube of 50)
units
AND Surface Mount 4 2 No SOIC 14 AHC - 5.5 V -8mA 7.9 ns @ 5 V, 12.3 ns @ 3.3 V 2 V 8mA
RS Stock No. 662-9571
Mfr. Part No.CD4023BM
HK$3.451
Each (In a Pack of 10)
units
NAND Surface Mount 3 3 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. 145-7375
Mfr. Part No.SN74LVC2G00DCUT
HK$5.52
Each (On a Reel of 250)
units
NAND Surface Mount 2 2 No VSSOP 8 LVC - 5.5 V -32mA 3.3 ns @ 5 V, 4.3 ns @ 3.3 V 1.65 V 32mA
RS Stock No. 809-6179
Mfr. Part No.CD4023BMT
HK$5.807
Each (In a Pack of 10)
units
NAND Surface Mount 3 3 No SOIC 14 4000 Differential 18 V -4.2mA 250 ns @ 50 pF 3 V 4.2mA
RS Stock No. 113-0130
Mfr. Part No.74HC32D,652
BrandNexperia
HK$3.08
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. 671-1579
Mfr. Part No.74LCX08M
HK$2.016
Each (In a Pack of 5)
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. 662-7096
Mfr. Part No.CD74HC30PWR
HK$2.657
Each (In a Pack of 10)
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. 662-6649
Mfr. Part No.74LVC1G3208DBVR
HK$2.04
Each (In a Pack of 10)
units
Multifunction Surface Mount 1 3 No SOT-23 6 LVC - 5.5 V -32mA 4 ns @ 5 V, 5.9 ns @ 3.3 V 1.65 V 32mA
RS Stock No. 145-0660
Mfr. Part No.CD4011UBM
HK$3.451
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. 923-2341
Mfr. Part No.SN74LS32N
HK$5.094
Each (In a Tube of 25)
units
OR Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 22 ns @ 5 V 4.75 V 8mA
RS Stock No. 921-0815
Mfr. Part No.ULN2003V12T16-13
HK$3.286
Each (In a Pack of 30)
units
- Surface Mount - - - TSSOP 16 - CMOS 5 V - 140ns 3.3 V 140mA
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