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 633-953
製造零件編號CD74HCT32E
HK$4.69
單位
OR Through Hole 4 2 No PDIP 14 HCT - 5.5 V -4mA 24 ns @ 4.5 V 4.5 V 4mA
RS庫存編號 145-0438
製造零件編號CD74HCT11M
HK$1.801
毎管:50 個
單位
AND Surface Mount 3 3 No SOIC 14 HCT - 5.5 V -4mA 28 ns @ 4.5 V 4.5 V 4mA
RS庫存編號 166-1437
製造零件編號74AHC1G08GW,125
BrandNexperia
HK$0.291
個 (在毎卷:3000)
單位
AND Surface Mount 1 2 No TSSOP 5 AHC - 5.5 V -8mA 7.9 ns @ 4.5 V to 5.5 V, 12.3 ns @ 3 V to 3.6 V 2 V 8mA
RS庫存編號 527-277
製造零件編號CD74HC00E
HK$3.415
毎管:25 個
單位
NAND Through Hole 4 2 No PDIP 14 HC - 6 V -5.2mA 15 ns @ 6 V, 18 ns @ 4.5 V, 90 ns @ 2 V 2 V 5.2mA
RS庫存編號 662-8815
製造零件編號SN74LVC1G86DCKT
HK$5.858
/個 (每包:5個)
單位
XOR Surface Mount 1 2 No SC-70 5 LVC - 5.5 V -32mA 4 ns @ 5 V, 5 ns @ 3.3 V 1.65 V 32mA
RS庫存編號 333-4520
製造零件編號CD74HCT32E
HK$3.89
毎管:25 個
單位
OR Through Hole 4 2 No PDIP 14 HCT - 5.5 V -4mA 24 ns @ 4.5 V 4.5 V 4mA
RS庫存編號 663-0468
製造零件編號CD74HCT11M
HK$2.841
/個 (每包:10個)
單位
AND Surface Mount 3 3 No SOIC 14 HCT - 5.5 V -4mA 28 ns @ 4.5 V 4.5 V 4mA
RS庫存編號 179-2163
製造零件編號SN74AHCT08D
HK$2.192
毎管:50 個
單位
AND Surface Mount 4 2 No SOIC 14 AHCT - 5.5 V -8mA 7.9 ns @ 5 V 4.5 V 8mA
RS庫存編號 663-1221
製造零件編號SN74AHCT08D
HK$2.168
/個 (每包:10個)
單位
AND Surface Mount 4 2 No SOIC 14 AHCT - 5.5 V -8mA 7.9 ns @ 5 V 4.5 V 8mA
RS庫存編號 162-6719
製造零件編號SN74LVC1G86DCKR
HK$0.60
個 (在毎卷:3000)
單位
XOR Surface Mount 1 2 No SC-70 5 LVC CMOS, TTL 5.5 V -32mA 5 ns @ 5 V 1.65 V 32mA
RS庫存編號 121-8309
製造零件編號SN74HC86N
HK$2.608
毎管:25 個
單位
XOR Through Hole 4 2 - 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庫存編號 166-1444
製造零件編號74LVC1G32GW,125
BrandNexperia
HK$0.274
個 (在毎卷:3000)
單位
OR Surface Mount 1 2 No TSSOP 5 LVC - 5.5 V -32mA - 1.65 V 32mA
RS庫存編號 163-0594
製造零件編號MC74HC1G32DTT1G
HK$0.415
個 (在毎卷:3000)
單位
OR Surface Mount 1 2 No TSOP 5 HC CMOS 6 V -2.6mA 155ns 2 V 2.6mA
RS庫存編號 806-1491
製造零件編號MC74HC1G32DTT1G
HK$0.804
Each (On a Tape of 100)
單位
OR Surface Mount 1 2 No TSOP 5 HC CMOS 6 V -2.6mA 155ns 2 V 2.6mA
RS庫存編號 510-403
製造零件編號74LVC1G32GW,125
BrandNexperia
HK$1.24
/個 (每包:50個)
單位
OR Surface Mount 1 2 No TSSOP 5 LVC - 5.5 V -32mA - 1.65 V 32mA
RS庫存編號 662-8887
製造零件編號SN74LVC2G00DCUT
HK$6.106
/個 (每包:5個)
單位
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庫存編號 662-7096
製造零件編號CD74HC30PWR
HK$2.174
/個 (每包:10個)
單位
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庫存編號 662-9571
製造零件編號CD4023BM
HK$3.297
/個 (每包:10個)
單位
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庫存編號 761-4334
製造零件編號74LCX08MX
HK$2.976
Each (On a Tape of 10)
單位
AND Surface Mount 4 2 No SOIC 14 LCX CMOS 3.6 V -24mA 6.2ns 2 V 24mA
RS庫存編號 145-0179
製造零件編號SN74LS136N
HK$5.219
毎管:25 個
單位
XOR Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.1mA 30 ns @ 5 V 4.75 V 8mA