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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If one has the integrated circuitone can carry out the circuit of figure Dynamic page of welcome. Figure 43 illustrates how one passes from a dtasheet to a demultiplexer. We will see that the same function can be obtained with a single multiplexer at sixteen entries. Return to the synopsis. Let us carry the entry of validation to state 0: To find the equation simplest of S1 741553, let us draw the picture of Karnaugh figure 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.
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. To determine how datawheet connect the sixteen inputs, it is enough to follow the described procedure and to build a table with sixteen lines like that of figure High 7153 page Preceding page Following page.
On the other hand, entry 3 on the level Htherefore is connected to the positive tension.
Static page of welcome. One does not find a demultiplexer with 2 ways integrated. 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 circuit which results from it is deferred on figure dstasheet In this chapter, we will examine the demultiplexers which are circuits whose function is opposite among that of the multiplexers. The diagram symbolic system and the mechanical equivalent of a demultiplexer with 2 ways are presented at figure Form of the perso pages. Forms maths Geometry Physics 1.
National Semiconductor – datasheet pdf
In short, the logical data present on the entry of validation is acicular towards the exit selected by the entries of the decoder. The advantage of the multiplexer compared to the network of doors is obvious: Let us examine simplest of the demultiplexers, that with 2 ways. Datasbeet one, carried to the state 1force the exit of the multiplexer corresponding to state 0 independently of the state of the other entries. Now let us carry the entry of validation to state 1: The example which follows will clarify the procedure.
The combinative circuit which fulfills the function of the demultiplexer with 2 ways must thus correspond to the truth table of figure If integrated logical doors are used, one obtains the circuit represented on figure The integrated circuit contains two multiplexers with 4 ways at entries of selection A and B communes.
This is made possible because the equation of the exit of a multiplexer reveals all the possible combinations of the entries of order. Electronic forum and Poem. The not selected exits position with state 1. For each combination of the entries of order, one defers in the column of the exit the state that dataxheet one must take.
It now remains to carry the selected entries at the levels indicated in the last column.
The stitching and the datasheft diagram of this integrated circuit are given on figure 32, while figure 33 gives its truth table. The integrated circuit 74LS contains two demultiplexers with 4 ways. Click here for the following lesson or in the synopsis envisaged to this end. How to make a site?
One has four switches being able to datashert 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. For example, entry 2 must be carried on the level Ltherefore connected to the 741553. The expressions and lead us to the logic diagram of figure This one indeed requires at least three integrated circuits: 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.
Datasheet pdf – Dual 4-Line to 1-Line Data Selectors/Multiplexers – National Semiconductor
Information, present on the input, is acicular towards the exit selected by the state of the entries of order. To know how to position the other entries, one draws up a table with all the combinations of the entries of order. 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.
Electronic forum and Infos. A circuit of this kind can be used for the indication of breakdowns, or for the counting of parts on a production line.