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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One has four switches being able to be connected either to the supply voltage, or with the mass and one wants to know so at least two switches are closed again on the positive tension of food. So I will accept it. Figure 43 illustrates how one passes from a decoder to a demultiplexer.

What, exactly, do you think the function of pins 1 and 74319 are?

The integrated circuit 74LS contains two demultiplexers with 4 ways. To know how to position the other entries, one draws up a table with all 741139 combinations of the entries of order.

If integrated logical doors are used, one obtains the circuit represented on figure Your explanation resolved my confusion. So, I was confused. Here is the link to take a look at datasheet.

The outputs are active low, hence the outputs that are not addressed are high. Sign up using Facebook. In this chapter, we will examine the demultiplexers which are circuits whose function is opposite among that of the multiplexers. Wouter van Ooijen One subjects the entry corresponding to the combination of the entries of order at the level wished at exit. The combinative circuit which fulfills the function of the demultiplexer with 2 ways must thus correspond to the truth table of figure The circuit which results from it is deferred on figure Post as a guest Name.


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

A circuit of this kind can be used for the indication of breakdowns, or for the counting of parts on a production line. It now remains to carry the selected entries at the levels indicated in the last column.

How to make a site? Before taking dattasheet look at demux, I actually took a look at mux’s datasheet, where I saw an Enable input, to enable or disable mux. Home Questions Tags Users Unanswered. It is noticed that the binary number formed by the state of the entries of selection B and A gives the decimal index of the exit concerned. If yes then how can I give it input and select lines?

This one indeed requires at least three integrated circuits: 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.

This is made possible dtaasheet the equation of the exit of a multiplexer reveals all the possible combinations of the dataasheet of order. The E enable line can be used as active low input.

74139 Datasheet PDF

Let us carry the entry of validation to state 0: This one, carried to the state 1force the exit of the multiplexer corresponding to state 0 independently of the state of the other entries. The example which follows will clarify the procedure.

Sign up using Email and Xatasheet. To find the equation simplest of S1let us draw the picture of Karnaugh figure The entries of ordering of the multiplexer become the entries of the network which one wants to carry out. Forms maths Geometry Physics 1. For each combination of datashert entries of order, one defers in the column of the exit the state that this one must take.


The exit of the circuit is brought to the level H when at least two datassheet the reversers are commutated on the dafasheet tension. Return to the synopsis. The stitching and the logic diagram of this circuit are given on figure 41, while figure 42 gives its truth table. Email Required, but never shown.

On the other hand, entry 3 on the level Htherefore is connected to the positive tension. Now let us carry the entry of validation to state 1: To contact the author.

The next theory will treat memories. If one has the integrated circuitone can carry out the circuit of figure In your first paragraph you say that a demux requires: I just better understood the concept from you than from Tom’s answer.

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. Click datxsheet for the following lesson or in the synopsis envisaged to this end.