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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Form of the perso pages. High of page Preceding page Following page. 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 The example which follows will clarify the datashret.
This one indeed requires at least three integrated circuits: Return to the synopsis. For dwtasheet combination, one indicates the logical level that must take the exit. This 741533, carried to the state 1force the exit of the multiplexer corresponding to state 0 independently of the state of the other entries.
Otherwise, it is necessary to turn to the demultiplexer integrated into 4 ways: The entries of ordering of the multiplexer become the entries of the network which one wants to carry out. 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.
This is made possible because the equation of the exit of a multiplexer reveals all the possible combinations of the entries jc order.
How to make a site? The circuit which results from it is deferred on figure The integrated circuit 74LS contains two demultiplexers with 4 ways. One does not find a demultiplexer with 2 ways integrated.
The integrated circuit contains two multiplexers with 4 ways at entries of selection A and B communes. The combinative circuit which fulfills the function of the demultiplexer with 2 ways must thus correspond to the truth table of figure In this chapter, we will examine datashewt demultiplexers which are circuits whose function is opposite among that of the multiplexers.
We will see that the same function can be obtained with datadheet single multiplexer at sixteen entries. The two groupings and D give us the following equation of S1: To know how to position the other entries, one draws up a table with all the combinations of the entries of order.
The stitching and the logic diagram of this integrated circuit are given on figure 32, while figure 33 gives its truth table.
It now remains to carry the selected entries at the levels indicated in the last column. The exit S with for the equation: If one has the integrated circuitone can carry out the circuit of figure The diagram symbolic system and the mechanical equivalent of a demultiplexer with 2 ways are presented at figure Information, present on the input, is acicular towards the exit selected by the state of the entries of order. The advantage of the multiplexer compared to the network of doors is obvious: Electronic forum and Infos.
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.
Datasheet pdf – Dual 4-Line to 1-Line Data Selectors/Multiplexers – National Semiconductor
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. In short, the logical data present on the entry of validation is acicular towards the exit selected by the entries of the decoder.
Let us carry the entry uc validation to state 0: One subjects the entry corresponding to the combination of the entries of order at the level wished at exit. Figure 43 illustrates how one passes from a decoder to a demultiplexer. We know that 741553 majority eatasheet the decoders have their active exits at state 0 and their entry of active validation to state 0.
In addition to the commutation of several logical signals, the multiplexer can be used to replace a network.
Static page of welcome. Click here for the following lesson or in the synopsis envisaged to this end. The next theory will treat memories.
(PDF) 74153 Datasheet download
datasheeet Dynamic page of welcome. 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 expressions and lead us to the logic diagram of figure