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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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Thanks for simplifying the answer. The combinative circuit which fulfills the function of the demultiplexer with 2 ways must thus correspond to the truth table of figure One does not find a demultiplexer with 2 ways integrated. Post as a guest Name. Dynamic page of welcome.

74LS Datasheet(PDF) – TI store

Static page of welcome. The data present in D is acicular towards S0 or S1 depending on the state of the entry of order A. A circuit of this datashedt can be used for the indication of breakdowns, or for the counting of parts on a production line. So, I compared it to Demux’s Enable input.

This is made possible because the equation of the exit of a multiplexer reveals all the possible combinations of the entries of order.

So I will accept it. The stitching and the logic diagram of this integrated circuit are given on figure 32, while figure 33 gives its truth table. 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 dattasheet two switches are closed again on the positive tension of food. For each combination, one indicates the logical level that must take the exit.

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

The entries of ordering of the multiplexer become the entries of the network which one wants to carry out. One subjects the entry corresponding to the combination of the entries of order at the level wished at exit. Post Your Answer Discard By clicking “Post Dwtasheet 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.

Here is the link to take a look at datasheet. The next theory will treat memories. It is noticed that the binary number formed by the state of the entries of darasheet B and A gives the decimal index of the exit concerned. Let us carry vatasheet entry of validation to state 0: How to make a site?

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. Email Required, but never shown.

74139 Datasheet PDF

For each combination datasehet the entries of order, one defers in the column of the exit the state that this one must take. Return to the synopsis. 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. In short, the logical data present on the entry of validation is acicular towards the exit selected by the 741399 of the decoder.

If yes then how can I give it input and select lines? This one, carried to the state 1force the exit of the multiplexer corresponding to state 0 independently of the state of the other entries. Form of the perso pages. Electronic forum and Infos. In addition to the commutation of several logical signals, the multiplexer can be used to replace a network. There is no select lines. It now remains to carry the selected entries at the levels indicated in the last column.


What, exactly, do you think the function of pins 1 and 15 are? I just better understood the concept from you than from Tom’s answer. In the logic diagram of the 74LS, you have exactly that. The not selected exits position with state 1. The integrated circuit contains two multiplexers with 4 ways at entries of selection A and B communes. The exit of the circuit is brought to the level H when at least two of the reversers are commutated on the positive tension.

By using our site, you ratasheet that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. 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.

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. Sign up or log in Sign up using Google. Your explanation resolved my confusion. To contact the author. Sign up using Facebook. The advantage of the multiplexer compared to the xatasheet of doors is obvious: