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

...
Read more Read less

Filters

Viewing 1 - 20 of 106 products
Results per page
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. 798-8910
Mfr. Part No.74AHC86T14-13
HK$1.362
Each (On a Tape of 25)
units
XOR Surface Mount 4 2 Yes TSSOP 14 AHC Schmitt Trigger 5.5 V -4mA 18.5 ns @ 50 pF 2 V 8mA
RS Stock No. 169-7221
Mfr. Part No.74AHC86T14-13
HK$1.082
Each (On a Reel of 2500)
units
XOR Surface Mount 4 2 Yes TSSOP 14 AHC Schmitt Trigger 5.5 V -4mA 18.5 ns @ 50 pF 2 V 8mA
RS Stock No. 146-0953
Mfr. Part No.ULN2003V12T16-13
HK$1.54
Each (On a Reel of 2500)
units
- Surface Mount - - - TSSOP 16 - CMOS 5 V - 140ns 3.3 V 140mA
RS Stock No. 921-0815
Mfr. Part No.ULN2003V12T16-13
HK$3.35
Each (In a Pack of 30)
units
- Surface Mount - - - TSSOP 16 - CMOS 5 V - 140ns 3.3 V 140mA
RS Stock No. 798-9102
Mfr. Part No.74HCT86S14-13
HK$2.888
Each (On a Tape of 25)
units
XOR Surface Mount 4 2 Yes SOIC 14 HCT Schmitt Trigger 5.5 V -4mA 48 ns @ 50 pF 4.5 V 4mA
RS Stock No. 165-8686
Mfr. Part No.74LV132AS14-13
HK$0.882
Each (On a Reel of 2500)
units
NAND Surface Mount 4 2 Yes SOIC 14 LV Schmitt Trigger 5.5 V -12mA 11 ns @ 50 pF 2 V 12mA
RS Stock No. 169-7128
Mfr. Part No.74LVC1G14FZ4-7
HK$0.872
Each (On a Reel of 5000)
units
NOT Surface Mount 1 - - DFN 6 LVC Schmitt Trigger 5.5 V -32mA 14 ns @ 1.8 V 1.65 V 32mA
RS Stock No. 751-2768
Mfr. Part No.74AHC1G02SE-7
HK$0.714
Each (In a Pack of 100)
units
NOR Surface Mount 1 2 Yes SOT-353 5 AHC Schmitt Trigger 5.5 V -8mA 9.5ns 2 V 4mA
RS Stock No. 122-0345
Mfr. Part No.74LVC1G08W5-7
HK$0.406
Each (On a Reel of 3000)
units
AND Surface Mount 1 2 - SOT-25 5 LVC - 5.5 V -32mA 5.5ns 1.65 V 32mA
RS Stock No. 827-0342
Mfr. Part No.74LV86AT14-13
HK$2.52
Each (In a Pack of 50)
units
XOR Surface Mount 4 2 Yes TSSOP 14 LV Schmitt Trigger 5.5 V -12mA 11 ns @ 50 pF 2 V 12mA
RS Stock No. 770-5339
Mfr. Part No.74LVC1G07Z-7
HK$2.709
Each (In a Pack of 50)
units
Non-Inverting Surface Mount 1 - - SOT-553 5 LVC CMOS 5.5 V -32mA 6 ns @ 2.7 V 1.65 V 32mA
RS Stock No. 165-8856
Mfr. Part No.74AHCT1G08SE-7
HK$0.327
Each (On a Reel of 3000)
units
AND Surface Mount 1 2 Yes SOT-353 5 AHCT Schmitt Trigger 5.5 V -8mA - 4.5 V 8mA
RS Stock No. 798-8875
Mfr. Part No.74AHC08S14-13
HK$2.604
Each (On a Tape of 25)
units
AND Surface Mount 4 2 Yes SOIC 14 AHC Schmitt Trigger 5.5 V -4mA 14.5 ns @ 50 pF 2 V 8mA
RS Stock No. 798-9039
Mfr. Part No.74HC32S14-13
HK$2.604
Each (In a Pack of 25)
units
OR Surface Mount 4 2 Yes SOIC 14 HC Schmitt Trigger 6 V -4mA 135 ns @ 50 pF 2 V 5.2mA
RS Stock No. 798-8985
Mfr. Part No.74HC00S14-13
HK$3.58
Each (On a Tape of 25)
units
NAND Surface Mount 4 2 Yes SOIC 14 HC Schmitt Trigger 6 V -4mA 135 ns @ 50 pF 2 V 5.2mA
RS Stock No. 921-0281
Mfr. Part No.74LVC1G11W6-7
HK$0.854
Each (In a Pack of 100)
units
AND Surface Mount 1 3 No SOT-26 5 LVC CMOS 5.5 V -32mA 3.7 ns @ 15 pF 1.65 V 32mA
RS Stock No. 165-8860
Mfr. Part No.74LVC1G97DW-7
HK$0.414
Each (On a Reel of 3000)
units
Multifunction Surface Mount 1 2 No SOT-363 6 LVC CMOS 5.5 V -32mA - 1.65 V 32mA
RS Stock No. 770-5351
Mfr. Part No.74LVC1G14FZ4-7
HK$2.954
Each (In a Pack of 25)
units
NOT Surface Mount 1 - - DFN 6 LVC Schmitt Trigger 5.5 V -32mA 14 ns @ 1.8 V 1.65 V 32mA
RS Stock No. 822-8710
Mfr. Part No.74LVC1G58W6-7
HK$0.932
Each (In a Pack of 100)
units
Multifunction Surface Mount 1 3 No SOT-26 6 LVC CMOS 5.5 V -32mA - 1.65 V 32mA
RS Stock No. 122-2834
Mfr. Part No.74HC32S14-13
HK$0.98
Each (On a Reel of 2500)
units
OR Surface Mount 4 2 - SOIC 14 HC Schmitt Trigger 6 V -4mA 135 ns @ 50 pF 2 V 5.2mA