November 30, 2020

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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High of page Preceding page Following page. I just better understood the concept from you than from Tom’s answer. In fact the image you show from the datasheet explains this in the “Pin Names” section just below the connection diagram.

74139 Datasheet PDF

Use of a decoder out of demultiplexer. The next theory will treat memories. One realizes that it is necessary to employ several types of doors, of the doors OR with 3 entriesa door OR at 2 entries and a door AND 4 entries. The example which follows will clarify the datashest. Post as a guest Name.

The stitching and the logic diagram of this circuit are given on figure 41, while figure 42 gives its truth table. How to make a site? We will see that the same function can be obtained with a single multiplexer at sixteen entries.

Datashret explanation resolved my confusion. Dynamic page of welcome. After that I have taken a look at the datasheet of 1: This one indeed requires at least three integrated circuits: In your first paragraph you say that a demux requires: 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.


If one has the integrated circuitone can carry out the circuit of figure Moreover, the use of a multiplexer makes it possible to pass easily from a datasheer function to another by changing the level of the inputs.

Multiplexers CI , The Demultiplexers 74LS

One has four switches being able to be connected 741139 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. Figure 43 illustrates how one passes from a decoder to a demultiplexer. Form of the perso pages. A circuit of this kind can be used for the indication of breakdowns, or for the counting of parts on a production line. Return to the synopsis. One subjects the entry corresponding to the combination datasheer the entries of order at the level wished at exit.

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adtasheet The data present in D is acicular towards S0 or S1 depending on the state of the entry of order A. The exit S with for the equation: 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. Email Required, but never shown. The expressions and lead us to the logic diagram of figure Dataseet E enable line can be used as active low input.


Sign up using Facebook. What, exactly, do you think the function of pins 1 and 15 are?

74LS Datasheet(PDF) – TI store

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. The exit of the circuit is brought to the level H when at least two of the reversers are commutated on the positive tension.

In this chapter, we will examine the demultiplexers which are circuits whose function is opposite among that of the multiplexers. Thanks for the answer. So, I compared it to Demux’s Enable input. It now remains to carry the selected entries at the levels indicated in the last column.

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