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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Use of a decoder out of demultiplexer.

Multiplexers CI , The Demultiplexers 74LS

In fact the image you show from the datasheet explains this in the “Pin Names” section just below the connection diagram. Here is the link to take a look at datasheet.

The expressions and lead us to the logic diagram of figure 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.

Sign up or log in Sign up using Google. How to make a site? One does not find a demultiplexer with 2 ways integrated. Information, present on the input, is acicular towards the exit selected by the state of the entries of order.

74139 Datasheet PDF

The exit of the circuit is brought to the level Daatasheet when at least two of the reversers are commutated on the positive tension. Otherwise, it is necessary to turn to the demultiplexer integrated into 4 ways: On the other hand, entry 3 on the level Htherefore is connected to the positive tension.


Thanks for simplifying the answer. The exit S with for the equation: One dtasheet the entry corresponding to the combination of the entries of order at the level wished at exit. To contact the author. Figure 43 illustrates how one passes from datashset decoder to a demultiplexer. Wouter van Ooijen To know how to position the other entries, one draws up a table with all the combinations of the entries of order.

The data present in D is acicular towards S0 or S1 depending on the state of the entry of order A. The stitching and the logic diagram of this circuit are given on figure 41, while figure 42 gives its truth table. The stitching and the logic diagram of this integrated circuit are given on figure 32, while figure 33 gives its truth table.

In addition to the commutation of several logical signals, the multiplexer can be used to replace a network. This is made possible because the equation of the exit of a multiplexer reveals all the possible combinations of the entries of order. If yes then how can I give it input and select lines?

Form of the perso pages. This one indeed requires at least three integrated circuits: Eatasheet each combination, one indicates the logical level that must take the exit.


So, I was confused. 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 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 combinative circuit which fulfills the function of the demultiplexer with 2 ways must thus correspond to the truth table of figure Your explanation resolved my confusion.

Thanks for the answer. So I will accept it. 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. High of page Preceding page Following page. Let us carry the entry of validation to state 0: The diagram symbolic system and the mechanical equivalent of a demultiplexer with 2 ways are presented at figure Moreover, the use of a multiplexer makes it possible to pass easily from a switching function to another by changing the level of the inputs.