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. 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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Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. The combinative circuit which fulfills the function of the demultiplexer with 2 ways must thus correspond to the truth table of figure To find datwsheet equation simplest of S1let us draw the picture of Karnaugh 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.

74139 Datasheet PDF

I just better understood the concept from you than from Tom’s answer. Thanks for simplifying the answer. The E enable line can be used as active low input.


In your first paragraph you say that a demux requires: What, exactly, do you think the function of pins 1 and 15 are? Here is the link to take a look at datasheet.

The outputs are active low, hence the outputs that are not addressed are high. Sign up using Email and Password. Forms maths Geometry Physics 1.

In addition to the commutation of dataeheet logical signals, the multiplexer can be used to replace a network. One does not find a demultiplexer with 2 ways integrated.

The expressions and lead us to the logic diagram of figure Electronic forum and Infos. If integrated logical doors are used, one obtains the circuit represented 74319 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.

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

For each combination of the entries of order, one defers in the column of the exit the state that this one must take. So, I compared it to Demux’s Enable input.

Return to the synopsis. To contact the author. For example, entry 2 must be carried on the level Ltherefore connected datashet the mass.


So, I was confused. So I will accept it.

If yes then how can I give it input and select lines? In the logic diagram of the 74LS, you have exactly that.

74LS Datasheet(PDF) – TI store

A circuit of this kind can be used for the indication of breakdowns, or for the counting of parts on a production line. Black Mamba 2. Let dagasheet carry the entry of validation to state 0: The example which follows will clarify the procedure. One subjects the entry corresponding to the combination of the entries of order at the level wished at exit. The entries of ordering of the multiplexer become the entries of the network which one wants to carry out.

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