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庫存編號 775-7784
製造零件編號74HCT1G32GW,125
BrandNexperia
HK$1.416
個 (以毎袋:30)
單位
OR Surface Mount 1 2 No TSSOP 5 HCT TTL 5.5 V -2mA 27ns 4.5 V 2mA
RS庫存編號 688-1521
製造零件編號MC14081BDR2G
HK$2.812
/個 (每包:5個)
單位
AND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 100 ns @ 15 V, 130 ns @ 10 V, 300 ns @ 5 V 3 V 4.2mA
RS庫存編號 178-7128
製造零件編號74LVC1G08GW,125
BrandNexperia
HK$0.282
個 (在毎卷:3000)
單位
AND Surface Mount 1 2 No TSSOP 5 LVC - 5.5 V -32mA - 1.65 V 32mA
RS庫存編號 518-9164
製造零件編號MC14081BDG
HK$4.08
單位
AND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 100 ns @ 15 V, 130 ns @ 10 V, 300 ns @ 5 V 3 V 4.2mA
RS庫存編號 145-0462
製造零件編號SN74LV02AD
HK$2.50
毎管:50 個
單位
NOR Surface Mount 4 2 No SOIC 14 LV - 5.5 V -12mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V, 16.1 ns @ 2.5 V 2 V 12mA
RS庫存編號 305-181
製造零件編號SN74LS33N
HK$12.47
單位
NOR Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.25mA 32 ns @ 5 V 4.75 V 24mA
RS庫存編號 146-0843
製造零件編號74HCT1G32GW,125
BrandNexperia
HK$0.347
個 (在毎卷:3000)
單位
OR Surface Mount 1 2 No TSSOP 5 HCT TTL 5.5 V -2mA 27ns 4.5 V 2mA
RS庫存編號 510-201
製造零件編號74LVC1G08GW,125
BrandNexperia
HK$0.937
/個 (每包:50個)
單位
AND Surface Mount 1 2 No TSSOP 5 LVC - 5.5 V -32mA - 1.65 V 32mA
RS庫存編號 178-4794
製造零件編號MC14081BDG
HK$2.161
毎管:55 個
單位
AND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 100 ns @ 15 V, 130 ns @ 10 V, 300 ns @ 5 V 3 V 4.2mA
RS庫存編號 145-5920
製造零件編號SN74LS33N
HK$9.048
毎管:25 個
單位
NOR Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.25mA 32 ns @ 5 V 4.75 V 24mA
RS庫存編號 170-3418
製造零件編號MC14081BDR2G
HK$0.91
個 (在毎卷:2500)
單位
AND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 100 ns @ 15 V, 130 ns @ 10 V, 300 ns @ 5 V 3 V 4.2mA
RS庫存編號 663-2644
製造零件編號SN74LV02AD
HK$3.21
/個 (每包:10個)
單位
NOR Surface Mount 4 2 No SOIC 14 LV - 5.5 V -12mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V, 16.1 ns @ 2.5 V 2 V 12mA
RS庫存編號 526-537
製造零件編號CD4011BE
HK$3.014
毎管:25 個
單位
NAND Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 90 ns @ 15 V, 120 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS庫存編號 166-2397
製造零件編號MM74HCT32MX
HK$1.469
個 (在毎卷:2500)
單位
OR Surface Mount 4 2 No SOIC 14 HCT - 5.5 V -4.8mA 20 ns @ 5 V 4.5 V 4.8mA
RS庫存編號 179-2125
製造零件編號SN74AC08DR
HK$3.063
毎管:50 個
單位
AND Surface Mount 4 2 No SOIC 14 AC - 6 V -24mA 7.5 ns @ 5 V, 9.5 ns @ 3.3 V 2 V 24mA
RS庫存編號 663-2509
製造零件編號SN74LS32D
HK$4.596
/個 (每包:5個)
單位
OR Surface Mount 4 2 No SOIC 14 LS - 5.25 V -0.4mA 22 ns @ 5 V 4.75 V 8mA
RS庫存編號 121-8348
製造零件編號CD4011BE
HK$3.014
毎管:25 個
單位
NAND Through Hole 4 2 - PDIP 14 4000 - 18 V -4.2mA 90 ns @ 15 V, 120 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS庫存編號 671-1848
製造零件編號MM74HCT32MX
HK$3.199
/個 (每包:10個)
單位
OR Surface Mount 4 2 No SOIC 14 HCT - 5.5 V -4.8mA 20 ns @ 5 V 4.5 V 4.8mA
RS庫存編號 662-9666
製造零件編號CD4077BE
HK$3.632
/個 (每包:5個)
單位
XNOR 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庫存編號 144-9938
製造零件編號CD4077BE
HK$1.867
毎管:25 個
單位
XNOR 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