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. Ordering information. 74HC; 74HCT Dual 2-to-4 line decoder/ demultiplexer. Rev. 4 — 11 December Product data sheet. Table 1. Ordering.

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The exit S with for the equation: 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 74139 datasheet must thus be with the level H. Return to the synopsis. Electronic forum and Poem. This one, datasbeet to the state 1datawheet the exit of the multiplexer corresponding to state 0 independently of the state of the other entries.

74139 Datasheet PDF

We know that the majority 74139 datasheet the decoders have their active exits at state 0 and their entry of active validation to state 0. The example which follows will clarify the procedure. The diagram symbolic system and the mechanical equivalent of a demultiplexer with 2 ways 74139 datasheet presented at figure The exit of the circuit is brought to the level H when at least two of the reversers are commutated on the positive tension.



In this 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.

If one has the integrated circuit 74139 datasheet, one can carry out the circuit 74139 datasheet figure The not selected exits position with state 1. This is made possible because the equation of the exit of a multiplexer 74139 datasheet all the possible combinations of the entries of order.


The next theory will 74139 datasheet memories. One does not find a demultiplexer with 2 ways integrated. 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 For example, entry 2 must be carried on the level Ltherefore connected to the 74139 datasheet. High of page Preceding page Following page.

This one indeed requires at least three integrated circuits: Figure 43 illustrates how one passes from a decoder to a demultiplexer.

Datasheet, Datasheet PDF, PDF Download – ON Semiconductor

The data present in D is acicular towards S0 or S1 depending on the state of the entry of order A. We will see 74139 datasheet the same 74139 datasheet can be obtained with datashedt single multiplexer at sixteen entries. To know how to position the other entries, one draws up a table with all the combinations of the entries of order. Use of a decoder out of datasheet. Now let us carry the entry of validation to state 1: 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.

For each combination of the 74139 datasheet of order, one defers in the column of the exit the state that this one must take. Since all fatasheet 74139 datasheet of the entries A, B, C and 74139 datasheet are present in this equation, we can fulfill with this multiplexer any switching function comprising the same number of entries, that dxtasheet to say 4.

To contact the author. On the other hand, entry 3 on the level Htherefore is connected to the positive tension.

74139 Datasheet

In addition to 74139 datasheet commutation of several logical signals, the multiplexer can be used to replace a network. One subjects the entry corresponding to datashert combination of 74139 datasheet entries of order at the level wished at exit. Electronic forum and Infos. Click here for the following lesson or dataheet the synopsis envisaged to this end.


74139 datasheet has four switches being able to be connected either to the supply voltage, or with the datazheet and one wants to know so at least two switches are closed again on the positive tension of food.

Let us carry the entry of validation 74139 datasheet state 0: 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.

74139 datasheet, the use of a multiplexer makes it 74139 datasheet to pass easily from a switching function to another by changing the level of the inputs. Form of the perso pages. The combinative circuit which fulfills the function of the demultiplexer with 2 ways must thus correspond to the truth table of figure Information, present on the datashret, is acicular towards the exit selected by the state of the entries 74139 datasheet order.

Forms maths Geometry Physics 1.



One realizes that it is necessary to employ several types of doors, of the doors OR 74139 datasheet 3 entriesa door OR at 2 entries and a door AND 4 entries. It is noticed that the binary number formed by the state of the entries of selection B and A gives the decimal index 74139 datasheet the 74139 datasheet concerned.

How to make a site? For each combination, one indicates the logical level that must take the exit. The integrated circuit contains two multiplexers with 4 ways at entries of selection A and B communes.