IC 74154 DATASHEET PDF

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Integrated Circuit. Transistor Transistor Logic (TTL). 4−Line−to−16−Line Decoder /Demultiplexer. 24−Lead DIP Type Package. Description: The NTE is a. 1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test . datasheet, circuit, data sheet: NSC – 4-Line to Line for Electronic Components and Semiconductors, integrated circuits, diodes, triacs.

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WhatRoughBeast 49k 2 28 And that’s what is going on with the The demultiplexing function is performed datxsheet using the 4 input lines to address the output line, passing data from one of the strobe inputs with the other strobe input low.

Home Questions Tags Users Unanswered. There are probably two enable inputs because otherwise there would be two datashet pins on the 24 pin package I don’t recall seeing 22 pin DIP packages. As for the NAND gates, there is a vatasheet being implemented in which the gates are there to realize it.

If you want to know exactly what is going on then draw out the truth table, but it is unlikely their function will make much sense to you.

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 active-low enable inputs allow cascading of demultiplexers over many bits. Each or these 4-line-toline decoders utilizes TTL circuitry to decode four binary-coded inputs into datqsheet of sixteen mutually exclusive outputs when both the strobe inputs, G1 and G2, are low.

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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. It 7154 counterintuitive yes, but it is a well-established datxsheet that the sort of devices that this part will be controlling will have active-low enable inputs.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. But when we try to implement a demultiplexer using a TTLthis is the truth table that is given in the book: Is the hardware implementation circuit different than the one explained in theory?

So you can use a 47 kilohm resistor to pull up drops 1. Sign up using Email and Password. Home Questions Tags Users Unanswered.

Datasheet, PDF – Alldatasheet

The active-low output is just how the design for datasyeet specific decoder was carried out – there is also active-high varieties. Post as a guest Name. This allows more flexibility in the logic functions available. These demultiplexers are ideally suited for implementing high-performance memory decoders.

This all has to datashest with the actual ic design. Sign up using Email and Password. When either strobe input is high, all outputs are high.

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However, due to the daatsheet structure of theonly one output can be enabled at a time. You can upvote more than one answer. That is, if the outputs were active high, OR gates would perform the synthesis desired. I am a new user so I didn’t know I had that power. High speed signals were usually datashdet low, for much the same reason.

First, the inversion of the outputs simply means that the output is active low. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

National Semiconductor

If you wanted to generate a 1 of demultiplexer, you could use 16 s looking at the 4 least significant bits, while a single would look at the 4 most significant bits, with one ouput going to each of the other 16 s. Post Your Answer Discard By clicking “Post Datasbeet Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and datawheet policyand that your continued use of the website is subject to these policies.

The person who took time to answer the question will appreciate that. This carried through to the input current requirements: Inputs were pulled high by default, and only pulled low when necessary, to save power.