El CI decodificador/demultiplexor de 4 a 16 TTL 74LS tiene dos entradas de datos G1 y G2 que activan a una única entrada en el nivel. In electronics, a multiplexer (or mux) is a device that combines several analog or digital input .. , demux. Output is inverted input. , CD/ is a TTL circuit, and TTL was designed to make the best use of which explains the basic functionality of the working of a demultiplexor.

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This page was last edited on 12 Decemberat Is the hardware implementation circuit different than the one explained in theory? The two 4-to-1 multiplexer outputs are fed into the 2-to-1 with the selector pins on the 4-to-1’s put in parallel giving a total number of selector inputs to 3, which is equivalent to an 8-to The actual implementation of the chosen ic has active low outputs.

Conversely, a demultiplexer or demux is a device taking a single input signal and selecting one of many data-output-lines, which is connected to the single input. From Wikipedia, the free encyclopedia. This is the image of a 1 to 16 demux. Since digital logic uses binary values, powers of 2 are used 4, 8, 16 demuultiplexor maximally control a number of inputs for the given number of selector inputs. The variables are connected to the selector inputs, and the function result, 0 or 1, for each possible combination of selector inputs is connected to the corresponding data input.


Multiplexers can also be used to implement Demultiplecor functions of multiple variables. Single-core Multi-core Manycore Heterogeneous architecture.

Sign up using Facebook. If you have some experience using BJTs you will know that NPN transistors are best used to pull a signal to 0V common emitter, with the output connected cemultiplexor the collector and quite weak at pulling a signal high.

Sign up using Email and Password. Any Boolean function of n variables and one result can be implemented with a multiplexer with n selector inputs. The datasheet of these demultiplexot is always the key to the correct implementation.


Email Required, but never shown. The image to the right demonstrates this benefit. For telecommunications, see multiplexing.

The binary value expressed on these selector pins determines the selected input pin. This all has to do with the actual ic design. Demultiplexers take one data input and a number of selection inputs, and they have several outputs. High speed signals were usually active low, for much the same reason. It is counterintuitive yes, but it is a well-established convention that the sort of devices that this part will be controlling will have active-low enable inputs.

The following 4-to-1 multiplexer is constructed from 3-state buffers and AND gates the AND gates are acting as the decoder:. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

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Processor register Register file Memory buffer Program counter Stack. And that’s what is going on with the This means that any function of the selection bits can demultillexor constructed by logically OR-ing the correct set of outputs. So theory will cover only the theory which explains the basic functionality of the working of a demultiplexor. But when we try to implement a demultiplexer using a TTLthis is the truth table that is given in 7154 book: In analog circuit design, a multiplexer is a special type of analog switch that connects one signal selected from several inputs to a single output.

I have a doubt in the demultiplexer section.

Multiplexer – Wikipedia

Multiplexers can also be used as programmable logic devicesspecifically to implement Boolean functions. And this carried through to the way the logic was used, and designed with. Retrieved from ” https: By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Sign up or log in Sign up using Google. Process software and digital networks. Other common sizes are 4-to-1, 8-to-1, and to So you can use a 47 kilohm resistor to pull up drops 1. The series has several ICs that contain multiplexer s:.