TL F –1. Order Number DMQB FMQB DMJ. DMW or DMN. See NS Package Number J16A N16E or W16A. Function Table. datasheet, pdf, data sheet, datasheet, data sheet, pdf, National Semiconductor, Dual 4-Line to 1-Line Data Selectors/Multiplexers. The LSTTL/MSI SN54/74LS is a very high speed Dual 4-Input. Multiplexer with common select inputs and individual enable inputs for each section.

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The next theory will treat memories.

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 advantage of the multiplexer compared to the network of doors is obvious: 47153 here for the following lesson or in the synopsis envisaged to this end.

The exit S with for the equation: Now let us carry the entry of validation to state 1: Let us carry the entry of validation to state 0: 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.

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.

National Semiconductor – datasheet pdf

The not selected exits position with state 1. In datasjeet chapter, we will examine the demultiplexers which are circuits whose function is opposite among that of the multiplexers. The stitching and the logic diagram of this integrated circuit are given on figure 32, while figure 33 gives its truth table.


The combinative circuit dqtasheet fulfills the function of the demultiplexer with 2 ways must thus correspond to the truth table of figure Use of a decoder out of demultiplexer.

Forms maths Geometry Physics 1. A circuit of this kind can be used for the indication of breakdowns, or for the counting of parts on icc production line. If one has the integrated circuitone can carry out the circuit of figure This one indeed requires at least three integrated circuits: Static page of welcome.

Otherwise, it is necessary to turn to the demultiplexer integrated into 4 ways: We will see that the same function can be obtained with a single multiplexer at sixteen entries. Return to the synopsis. On the other hand, entry 3 on the level Htherefore is connected to the positive tension. The stitching and the logic diagram of this circuit are given on figure 41, datashest figure 42 gives its truth table.

Form of the perso pages. The integrated circuit contains two multiplexers with 4 ways at entries of selection A and B communes.

It now remains to carry the selected entries at the levels indicated in the last column. To contact the author. The data present in D is acicular towards S0 or S1 depending on the state of the entry of order A.

Dual 4-Input Multiplexer

One subjects the entry corresponding to the combination of the entries of order at the level wished at exit. The two groupings and D give us the following equation of S1: In addition to the commutation of several logical signals, the multiplexer can be used to replace a network.


The circuit which results from it is deferred on figure In the table of figure 35, the lines represented in red characters correspond if at least two of the entries of order are on the level H and for which the exit must thus be with the level H.

The expressions and lead us to the logic diagram of figure Electronic forum and Poem. In short, the logical data present on the ddatasheet of validation is acicular towards the exit selected by the entries of the decoder.

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 The example which follows will clarify the procedure. How to make a site?

National Semiconductor

Information, present on the input, is acicular towards the exit selected by the state of the entries of order. The integrated circuit 74LS contains two demultiplexers with 4 ways. Figure 43 illustrates how one passes from a decoder to a demultiplexer.