Posted on February 10, 2019


Part Number: 74LS, Maunfacturer: Motorola, Part Family: 74, File type: PDF, Document: Datasheet – semiconductor. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may. r/Demultip lex e r. 74LS / 74LSSMD / 74LS Decoder/Demultiplexer. General Description. These Schottky-clamped circuits are designed to be used.

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The combinative circuit which fulfills the function of the demultiplexer with 2 ways must thus correspond to the truth table of figure In the logic diagram of the 74LS, you have exactly that. High of dtaasheet Preceding page Following page. How to make datashedt site?

In this chapter, we will examine the demultiplexers which are circuits whose function is opposite among that of the multiplexers. Sign up using Facebook. Thus to use a decoder out of demultiplexer, the entry of validation becomes the input and the entries of the decoder become the entries of ordering of the demultiplexer.

So, I was confused. This is made possible because the equation of the exit of a multiplexer reveals all the possible combinations of the entries of order. The example which follows will clarify the procedure. Wouter van Ooijen Click here for the following lesson or in the synopsis envisaged to this end. Return to the synopsis.

The not selected exits position with state 1. The diagram symbolic system and the mechanical equivalent of a demultiplexer with 2 ways are datashet at figure Let us examine simplest of the demultiplexers, that with 2 ways.


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74139 Datasheet PDF

To know how to position the other entries, one draws up a table with all the combinations of the entries of order. Forms maths Geometry Physics 1.

One subjects the entry corresponding to the combination of the entries of order at the level wished at exit. This one, carried to the state 1force the exit darasheet the multiplexer corresponding to state 0 independently of the state of the other entries.

On the other hand, entry 3 on the level Htherefore is connected to the positive tension. We know that the majority of the decoders have their active exits at state 0 and their entry of active validation to state 0.

(Datasheet) pdf – Dual 2 to 4 Demultiplexers (1-page)

catasheet The expressions and lead us to the logic diagram of figure Black Mamba 2. In short, the logical data present on the entry of validation is acicular towards the exit selected by the entries of the decoder.

Vatasheet E enable line can be used as active low input. Otherwise, it is necessary to turn to the demultiplexer integrated into 4 ways: Home Questions Tags Users Unanswered. The outputs are active low, hence the outputs that are not addressed are high.

The integrated circuit contains two multiplexers with 4 ways at entries of selection A and B communes. In the table of figure 35, the lines represented in red characters correspond if at least two of the entries of order are on the level H and for which the exit must thus be with the level H.

Let us carry the dqtasheet of validation to state 0: A circuit datawheet this kind can be used for the indication of breakdowns, or for the counting of parts on a production line. After that I have taken a look at the datasheet of 1: 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.


Since all the combinations of the entries A, B, C and D are present in this equation, we can fulfill with this multiplexer any switching function comprising the same number of entries, that is to say 4. According to what was known as before, the four switches are connected to the four entries of order D, C, B, A of the multiplexer. 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.

Before taking a look at demux, I actually took a look at mux’s datasheet, where I saw an Enable input, to enable or disable mux.

To contact the author. So I will accept it.

The circuit which results from it is deferred on figure The exit of the circuit is brought to the level H when at least two of the reversers are commutated on the positive tension. Sign up using Email and Password. Post as a guest Name. The stitching and the logic diagram of this integrated circuit are given on figure 32, while figure 33 gives its truth datashret.

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