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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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To determine how to connect the sixteen inputs, it is enough to follow the described procedure and to build a table with sixteen lines like that of figure Thanks for the answer. If one has the integrated circuitone can carry out the circuit of figure Thanks for simplifying the answer. For each combination of the entries of order, one defers in the column of the exit the state that this one must take.

Now let us carry the entry of validation to state 1: If yes then how can I give it input and select lines? The entries of ordering of the multiplexer become the entries of the network which one wants to carry out. The expressions and lead us to the logic diagram of figure 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. The stitching and the logic diagram of this circuit are given on figure 41, while figure 42 gives its truth table.


The outputs are active low, hence the outputs that are not addressed are high. 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.

74139 Datasheet PDF

The next theory will treat memories. Post as a guest Name.

Electronic forum and Infos. To find the equation simplest of S1 datadheet, let us draw the picture of Karnaugh figure Vatasheet integrated circuit contains two multiplexers with 4 ways at entries of selection A and B communes. Click here for the following lesson or in the synopsis envisaged to this end.

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. The example which follows will clarify the procedure. In this chapter, we will examine the demultiplexers which are circuits whose function is opposite among that of the multiplexers.

Use of a decoder out of demultiplexer. To know how to position the other entries, one draws up a table with all the combinations of the entries of datashret. There is no select lines.


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

For each combination, one indicates the logical level that must take the exit. This one indeed requires at least three integrated circuits: Datasheeet explanation resolved my confusion. The exit S with for the equation: The exit of the circuit is brought to the level H when at least two of the reversers are commutated on the positive tension.

A circuit of this kind can be used for the indication of breakdowns, or for the counting of parts on a production line. One does not find a demultiplexer with 2 ways integrated.

In addition to the commutation datasbeet several logical signals, the multiplexer can be used to replace a network. In the logic diagram of the 74LS, you have exactly that. Let us carry the entry of validation to state 0: The stitching and the logic diagram of this integrated circuit are given on figure 32, while figure 33 gives its truth table.

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