N Datasheet, N PDF, N Data sheet, N manual, N pdf, N, datenblatt, Electronics N, alldatasheet, free, datasheet. Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise . 3. Ordering information. 74HC; 74HCT 4-to line decoder/ demultiplexer. Rev. 7 — 29 February Product data sheet. Table 1. Ordering .

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All the other ouputs stay high. This leads to possible outputs ranging from to on the 4 pins. Since the ouputs are active low, NAND gates do the job. Sign up or log in Sign up using Google. Serial to Parallel Demultiplexer. If you are looking for a different way to drive your outputs, or want an easier solution to your output needs, this tutorial is definitely for you.

Use 4 Arduino pins for 16 outputs! Any pointers would be helpful. This section will describe each pin you will need to use.

Hi Sean, No, that would not work. Paul Johnosn 744154n 1, at 5: A demultiplexer is a great way to allow you to use more output pins for your Arduino. June 19th, 0 Comments. Make sure to fully understand what goes where and how everything is tied together internally. Here is the truth table from the datasheet: The account aided me a acceptable deal. If you have any questions about a specific segment, leave them in a comment below or on the forums. EEEnthusiast May 12, at 8: Keep in mind that my video showcases the hardware implementation of the IC before jumping into the Arduino Serial to Parallel implementation.


It requires a 32 LED 74145n array.

It will indicate which output you need to toggle on the Arduino in order to drive the appropriate output of the Demultiplexer. Leave A Comment Cancel reply Comment. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Many TTL parts and older memory chips have active low enable inputs, so the active low outputs of this part can be connected directly to those inputs.

No, that would not work. First, the inversion of the outputs simply means that the output is active low.

If you have any questions about the implementation, feel free to post them below or on the forums. Hi, I am new to the Arduino, I have a project I am working on to test wiring harness.

4 to 16 decoder logic diagram – Electrical Engineering Stack Exchange

Sean Lovelady May 12, at 1: And why are there 2 of them, you ask? June 18th, 1 Comment. As for the NAND gates, there is a function being implemented in which the gates are there to realize it.

Sorry, I just stuck with the defaults of that addon. This site uses Akismet to reduce spam. 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.

So is it possible that both enables are hooked to a 2-input OR gate; this is just making use of the extra pins to make 24? Please consider upvoting those questions you found useful like this one by clicking the arrow pointing up near the answer vote count which is in turn above the checkbox you clicked to accept this question. You can upvote more than one answer.


Notify me of follow-up comments by email. That is, if the outputs were active high, OR gates would perform the synthesis desired. You can find me on my personal site or LinkedIn! Its purpose is to take a Serial signal and convert it to a parallel one.

There are probably two enable inputs because otherwise there would be two unused pins on the 24 pin package I don’t recall seeing 22 pin DIP packages. The active-low output is just how the design for that specific decoder was carried out – there is also active-high varieties.

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Use 4 Arduino pins for 16 outputs! Serial to Parallel Demultiplexer

EEEnthusiast August 13, at 9: I would like to appprentice even as you amend your website, how can i subscribe for a blog site? I had been a little bit familiar of this your broadcast offered bright clear idea Diego recently posted… Diego. I was wondering if you can control multiple 74hc with the 74lsn. If you go through the datasheet of the IC, you will see a pinout section.

Sign up using Email and Password. I am making a Jupiter II model, and want to build the fusion core for the bottom of it. 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. Email Required, but never shown.