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. Logic gates are primarily implemented using diodes or transistors as electrical switches, but can also be constructed using electromagnetic relays (relay logic), vacuum tubes, optics, molecules, fluidic logic, pneumatic logic, or even mechanical elements.

Types of Logic Gate

Logic gates have distinct logic functions. The most common of these are known as basic gates. These include:

  • AND Gates - these gates have multiple inputs that are processed into a single signal output 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 - similar to 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.

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 such as:

  • Encoders & Decoders
  • Multiplexers & Demultiplexers
  • Full and 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 670-9794
製造零件編號NC7SZ08P5X
TWD8.00
/個 (每包:10個)
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AND Surface Mount 1 2 No SC-70 5 TinyLogic UHS - 5.5 V -32mA 4.5 ns @ 5 V, 5.2 ns @ 3.3 V 1.65 V 32mA
RS庫存編號 805-1497
製造零件編號M74VHC1G132DFT1G
TWD3.80
/個 (每包:100個)
單位
NAND Surface Mount 1 2 Yes SC-88A 5 VHC Schmitt Trigger 5.5 V -8mA 19.6 ns @ 50 pF 2 V 8mA
RS庫存編號 145-5225
製造零件編號M74VHC1G132DFT1G
TWD1.70
個 (在毎卷:3000)
單位
NAND Surface Mount 1 2 Yes SC-88A 5 VHC Schmitt Trigger 5.5 V -8mA 19.6 ns @ 50 pF 2 V 8mA
RS庫存編號 178-4794
製造零件編號MC14081BDG
TWD12.60
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 170-3418
製造零件編號MC14081BDR2G
TWD3.90
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 761-4375
製造零件編號74VHC00MTCX
TWD12.10
/個 (每包:25個)
單位
NAND Surface Mount 4 2 No TSSOP 14 VHC CMOS 5.5 V -8mA 13ns 2 V 8mA
RS庫存編號 739-0091
製造零件編號NC7SZ32M5X
TWD10.00
/個 (每包:10個)
單位
OR Surface Mount 1 2 No SOT-23 5 TinyLogic UHS CMOS 5.5 V -32mA 5.5ns 1.65 V 32mA
RS庫存編號 166-2758
製造零件編號74VHC00MTCX
TWD4.30
個 (在毎卷:2500)
單位
NAND Surface Mount 4 2 No TSSOP 14 VHC - 5.5 V -8mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V 2 V 8mA
RS庫存編號 145-4504
製造零件編號74VHC00MTC
TWD3.50
毎管:94 個
單位
NAND Surface Mount 4 2 No TSSOP 14 VHC - 5.5 V -8mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V 2 V 8mA
RS庫存編號 688-1521
製造零件編號MC14081BDR2G
TWD15.80
/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 169-8554
製造零件編號NC7SZ32M5X
TWD2.50
個 (在毎卷:3000)
單位
OR Surface Mount 1 2 No SOT-23 5 TinyLogic UHS CMOS 5.5 V -32mA 5.5ns 1.65 V 32mA
RS庫存編號 184-4286
製造零件編號MC74HC86ADG
TWD11.30
毎管:55 個
單位
XOR Surface Mount 1 1 - SOIC 14 74HC - 6 V - 150ns 2 V -
RS庫存編號 518-9164
製造零件編號MC14081BDG
TWD16.00
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 806-2368
製造零件編號MC74HC02ADR2G
TWD11.30
Each (On a Tape of 50)
單位
NOR Surface Mount 4 2 No SOIC 14 LS CMOS 6 V 5.2mA 110 ns @ 50 pF 2 V 5.2mA
RS庫存編號 806-3983
製造零件編號MC74VHC1G08DTT1G
TWD4.60
Each (On a Tape of 100)
單位
AND Surface Mount 1 2 No TSOP 5 VHC CMOS 5.5 V -8mA 16.5 ns @ 50 pF 2 V 8mA
RS庫存編號 186-8310
製造零件編號MC74ACT08DG
TWD12.70
/個 (每包:25個)
單位
AND Surface Mount 4 2 - SOIC 14 ACT TTL 5.5 V -24mA 10 ns @ 50 pF 4.5 V 24mA
RS庫存編號 184-4271
製造零件編號MC74HC00ADG
TWD11.30
毎管:55 個
單位
NAND Surface Mount 4 2 - SOIC 14 74HC CMOS 6 V 5.2mA 110 ns @ 50 pF 2 V 5.2mA
RS庫存編號 178-4789
製造零件編號MC74HC32ADG
TWD11.30
毎管:55 個
單位
OR Surface Mount 4 2 No SOIC 14 HC - 6 V -5.2mA 13 ns @ 6 V, 15 ns @ 4.5 V, 30 ns @ 3 V, 75 ns @ 2 V 2 V 5.2mA
RS庫存編號 163-0587
製造零件編號MC74HC00ADTR2G
TWD3.90
個 (在毎卷:2500)
單位
NAND Surface Mount 4 2 No TSSOP 14 LS CMOS 6 V 5.2mA 110 ns @ 50 pF 2 V 5.2mA
RS庫存編號 186-7284
製造零件編號MC74ACT08DG
TWD12.70
毎管:55 個
單位
AND Surface Mount 4 2 - SOIC 14 ACT TTL 5.5 V -24mA 10 ns @ 50 pF 4.5 V 24mA