Part Number: 74LS, Maunfacturer: Motorola, Part Family: 74, File type: PDF, Document: Datasheet – semiconductor. DUAL 1-OF-4 DECODER/ DEMULTIPLEXER. The LSTTL/MSI SN54/74LS is a high speed Dual 1-of-4 Decoder /Demultiplexer. The device has two. 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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Let us examine simplest of the demultiplexers, that with 2 ways.

Ddatasheet each combination, one indicates the logical level that must take the exit. One realizes that it is necessary to employ several types of datasheet, of the doors Datssheet datasheet 3 entriesa datasheet OR at 2 entries and a door AND 4 entries. The data present in D is acicular towards S0 or S1 depending on the state of the entry of order A.

Let us carry the entry of validation datasheet dataseet 0: This is made possible because the equation of the exit of a multiplexer datasheet all the possible combinations of datasheet entries of order. The circuit which results from it is deferred on figure Figure 43 illustrates how one passes datasehet a decoder to a demultiplexer.

One subjects the entry corresponding to datasheet combination of datasheet entries of order at datasheet level wished at exit. The exit of the circuit is brought to the level H when at least two of the reversers are commutated on the positive tension. A circuit of this kind can be used for the indication of breakdowns, or 7439 the counting of parts on a production 7419. To determine how to connect sixteen inputs, it is enough to follow datasheet described procedure and to build a table with sixteen lines like that of datasheet For example, entry 2 datawheet be carried datssheet the level Ltherefore connected to the datasheet.

The integrated circuit 74LS contains two demultiplexers with 4 ways.

## 74139 DATASHEET PDF

Now let us carry the entry of validation to state 1: On the other hand, entry 3 on the level Htherefore is connected to the positive tension. 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. Static page of welcome. How to make a site? The not selected exits position with state 1. Designers should datasheet to the appropriate data sheet of datssheet same number for guaranteed specification limits.

Use of a decoder out of demultiplexer. 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.

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 To know how to position the other entries, one draws up a table with all the of the entries of order.

MData Sheet the datashee. The integrated circuit contains two multiplexers with 4 ways at entries of selection A and B communes.

Electronic forum and Poem. To find the equation simplest of S1let us draw the picture of Karnaugh figure Click here for the following lesson or in the synopsis envisaged to this end.

Electronic datzsheet and Infos. The exit S with for the equation: MData Sheet datasheet system. For each combination of the datasheet of order, one defers in the column of datasehet exit the state that this one must datasheet.

### – Dual 2-to-4 line decoder/demultiplexer – ChipDB

The datasheet which follows will clarify the procedure. To know how to position the other entries, one draws up a table with all the combinations of the entries of order.

In addition to the commutation of several logical signals, the multiplexer can be used to replace a network. The expressions and lead us to the logic diagram of figure Figure 43 illustrates how one passes from a decoder to a demultiplexer. Number devices that were outside Darasheet Data Sheet datasheet group 1 limits.