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 540-8134
製造零件編號TC74HC32AF(F)
BrandToshiba
HK$2.592
/個 (每包:5個)
單位
OR Surface Mount 4 2 No SOP 14 HC - 6 V -5.2mA 13 ns @ 6 V, 15 ns @ 4.5 V, 75 ns @ 2 V 2 V 5.2mA
RS庫存編號 540-0512
製造零件編號TC7S32F(F)
BrandToshiba
HK$2.302
/個 (每包:5個)
單位
OR Surface Mount 1 2 No SSOP 5 HC - 6 V -2.6mA 17 ns @ 6 V, 20 ns @ 4.5 V, 100 ns @ 2 V 2 V 2.6mA
RS庫存編號 539-9204
製造零件編號TC74HC00AP(F)
BrandToshiba
HK$4.14
/個 (每包:5個)
單位
NAND Through Hole 4 2 No PDIP 14 HC - 6 V -5.2mA 13 ns @ 6 V, 15 ns @ 4.5 V, 75 ns @ 2 V 2 V 5.2mA
RS庫存編號 540-6863
製造零件編號TC7SH08FU(F)
BrandToshiba
HK$2.302
/個 (每包:5個)
單位
AND Surface Mount 1 2 No SSOP 5 VHC - 5.5 V -8mA 7.9 ns @ 5 V, 12.3 ns @ 3.3 V 2 V 8mA
RS庫存編號 540-7620
製造零件編號TC74HC08AF(F)
BrandToshiba
HK$3.488
/個 (每包:5個)
單位
AND Surface Mount 4 2 No SOP 14 HC - 6 V -5.2mA 13 ns @ 6 V, 15 ns @ 4.5 V, 75 ns @ 2 V 2 V 5.2mA
RS庫存編號 171-3528
製造零件編號74VHCT08AFT
BrandToshiba
HK$2.552
/個 (每包:50個)
單位
AND Surface Mount 4 2 - TSSOP 14 74VHCT CMOS, TTL 5.5 V -8mA 10 ns @ 50 pF 4.5 V 8mA
RS庫存編號 171-3285
製造零件編號74LCX02FT
BrandToshiba
HK$0.773
個 (在毎卷:2500)
單位
NOR Surface Mount 4 2 - TSSOP 14 74LCX CMOS 3.6 V -24mA 22 ns @ 50 pF 1.65 V 24mA
RS庫存編號 539-9210
製造零件編號TC74HC02AP(F)
BrandToshiba
HK$4.084
/個 (每包:5個)
單位
NOR Through Hole 4 2 No PDIP 14 HC - 6 V -5.2mA 13 ns @ 6 V, 15 ns @ 4.5 V, 75 ns @ 2 V 2 V 5.2mA
RS庫存編號 171-3153
製造零件編號TC7WZ86FK
BrandToshiba
HK$2.106
/個 (每包:50個)
單位
XOR Surface Mount 2 2 - SOT-765 8 - CMOS 5.5 V -32mA 13.5 ns @ 15 pF 1.65 V 32mA
RS庫存編號 171-3313
製造零件編號74VHC08FT
BrandToshiba
HK$0.872
個 (在毎卷:2500)
單位
AND Surface Mount 4 2 - TSSOP 14 74VHC CMOS, TTL 5.5 V -8mA 15.5 ns @ 50 pF 2 V 8mA
RS庫存編號 171-3492
製造零件編號74HC08D
BrandToshiba
HK$2.427
/個 (每包:50個)
單位
AND Surface Mount 4 2 - SOIC 14 74HC - 6 V -5.2mA 135 ns @ 50 pF 2 V 5.2mA
RS庫存編號 171-3338
製造零件編號74VHC32FT
BrandToshiba
HK$0.872
個 (在毎卷:2500)
單位
OR Surface Mount 4 2 - TSSOP 14 74VHC CMOS, TTL 5.5 V -8mA 14.5 ns @ 50 pF 2 V 8mA
RS庫存編號 144-5322
製造零件編號TC7SH08FU,LJ(CT
BrandToshiba
HK$0.862
/個 (每包:100個)
單位
AND Surface Mount 1 2 - SOT-353 5 CMOS CMOS 5.5 V dc - 15.5 ns @ 50 pF 2 V dc -
RS庫存編號 171-3163
製造零件編號TC7WZ86FU
BrandToshiba
HK$1.853
/個 (每包:50個)
單位
XOR Surface Mount 2 2 - SOT-505 8 - CMOS 5.5 V -32mA 12 ns @ 15 pF 1.65 V 32mA
RS庫存編號 171-3373
製造零件編號74HC02D
BrandToshiba
HK$1.97
個 (在毎卷:2500)
單位
NOR Surface Mount 4 2 - SOIC 14 74HC - 6 V -5.2mA 95 ns @ 50 pF 2 V 5.2mA
RS庫存編號 171-3329
製造零件編號74VHC21FT
BrandToshiba
HK$0.746
個 (在毎卷:2500)
單位
AND Surface Mount 2 4 - TSSOP 14 74VHC CMOS, TTL 5.5 V -8mA 13.5 ns @ 50 pF 2 V 8mA
RS庫存編號 171-3578
製造零件編號74VHC00FT
BrandToshiba
HK$2.394
/個 (每包:50個)
單位
NAND Surface Mount 4 2 - TSSOP 14 74VHC CMOS, TTL 5.5 V -8mA 14.5 ns @ 50 pF 2 V 8mA
RS庫存編號 756-2996
製造零件編號TC74LCX00F(K,F)
BrandToshiba
HK$3.465
/個 (每包:10個)
單位
NAND Surface Mount 4 2 No SOP 14 LCX CMOS 3.6 V +50mA 6ns 2 V -50mA
RS庫存編號 896-6784
製造零件編號TC7WH32FK,LJ(CT
BrandToshiba
HK$2.394
/個 (每包:25個)
單位
OR Surface Mount 1 2 No SSOP 8 VHC CMOS 5.5 V -8mA 13 ns @ 50 pF 2 V 8mA
RS庫存編號 540-6914
製造零件編號TC7SH32FU(F)
BrandToshiba
HK$2.302
/個 (每包:5個)
單位
OR Surface Mount 1 2 No SSOP 5 VHC - 5.5 V -8mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V 2 V 8mA