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 stitching and the logic diagram of this integrated circuit are given on figure 32, while figure 33 gives its truth table. How to make dataseet site? The integrated circuit contains two multiplexers with 4 ways at entries of selection A and B daatsheet. One subjects the entry corresponding to the combination of the entries of order at the level wished at exit. The expressions and lead us to the logic diagram of figure One does not find a demultiplexer with 2 ways integrated.

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. 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 To find the equation simplest of S1let us draw the picture of Karnaugh figure 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.


The not selected datashert position with state 1. Otherwise, it is necessary to turn to the demultiplexer integrated into 4 ways: By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Form of the perso pages. The stitching and the logic diagram of this circuit are given on figure 41, while figure 42 gives its truth table. There is no select lines. I just better understood the concept from you than from Tom’s answer.

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

Sign up or log in Sign up using Google. Home Questions Tags Users Unanswered. Let us examine simplest of the demultiplexers, that with 2 ways.

Wouter van Ooijen The E enable line can be used as active low input. The advantage of the multiplexer compared to the network of doors is obvious: In the logic diagram of the 74LS, you have exactly that. To contact the author. The exit S with for the equation: If one has the integrated circuitone can carry out the circuit of figure For datashdet combination, one indicates the logical level that must 774139 the exit.

74139 Datasheet PDF

Sign up using Email and Password. Return to the synopsis. So I will accept it.

Let us carry the entry of validation to state 0: On the other hand, entry 3 on the level Htherefore is connected to the positive tension. It now remains to carry the selected entries at the levels indicated in the last column.


Thanks for datassheet the answer. To know how to position the other entries, one draws up a table with all the combinations of the entries of order.

– Dual 2-to-4 line decoder/demultiplexer – ChipDB

Thanks for the answer. Black Mamba 2.

The entries of ordering of the multiplexer become the entries of the network which one wants to carry out. 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. Static page datqsheet welcome. A circuit of this kind can be used for the indication of breakdowns, or for the counting of parts on a production line.

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Figure 43 illustrates how one passes from a decoder to a demultiplexer. The diagram symbolic system and the mechanical equivalent of a demultiplexer with 2 ways are presented at figure Use of a decoder out of demultiplexer. If integrated logical doors are used, one vatasheet the circuit represented on figure The circuit which results from it is deferred on figure