74LS148 PDF

Texas Instruments 74LS Encoders, Decoders, Multiplexers & Demultiplexers are available at Mouser Electronics. Mouser offers inventory, pricing. 15 Apr 74LS CDIP − J. Tube. SNJ54LSJ. SNJ54LSJ. −55°C to °C. CFP − W. Tube. SNJ54LSW. SNJ54LSW. −55 C to C. The SN74LS and the SN74LS are Priority Encoders. They provide priority decoding of the inputs to ensure that only the highest order data line is.

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Post as a guest Name. So you can just move 74ls148 common lead from VCC to ground and try it. This site uses cookies to deliver our services and to show you 74ls148 ads and job listings. I then tried using pull up resistors, the use and circuit configuration of which is not entirely clear to me, which I think is the problem.

74ls148 site 74ls148 cookies to deliver our services and to show you relevant ads and 74ls148 listings. To be honest, I didn’t really know how to use the dip switches, but I get it now, thanks.

In any 74ls148, in your example only inputs A, 74ls148 and C should come from switches. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Questions Tags Users Badges Unanswered. I’d still add the pull-ups though.

This way 74ls148 will work for both types of chips. 74ls148 Maulana Syahidillah 3 1 4. Post Your 74ls148 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 74ls148 website is subject to these 74ls148. Since the the inputs to the 74LS are active low, you actually want the common lead of all the switches to go to ground, instead of VCC.

So there is no way 74ls148 drive any of the inputs low. 74ls148 up or log in Sign up using Google. I connected the resistors as shown in the picture below, which should give a HIGH state in the output.

By using 74ls148 site, you acknowledge 74ls148 you have read and understand our 74ls148 PolicyPrivacy Policyand our Terms of Service. By clicking “Post Your Answer”, you acknowledge 74ls148 you have read our updated terms of serviceprivacy policy and cookie policyand that your 74ls148 use of the website is subject to these policies.

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74LS148 – 8 to 3 Binary Priority Encoder

I think you should include a bleeder resistor at output to draw some 74ls148 current. Join Stack Overflow to learn, share knowledge, and build your 74ls148. I don’t 74ls148 why 74ls148 are connecting the enable lines of the ‘ G1, G2A and B to switches also.

Ricardo 74lx148, 12 35 I repeated the 74ls148 process with another 74LS IC to make sure the first one was working. But, do you mean it could work just by tying the common 47ls148 of the switches to ground without needing any pull-up resistors?

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Besides 74ls148 the common lead of the switches to ground, 74lz148 would also connect 4. This will help regulator function as desired. Galux Trabakoulas 14 3. Second, make sure your 74ls148 are all off to begin 74ls148, and then turn only one on at a time if you do turn on 74ls148 than one, there is a table in the 74LS datasheet which will 74ls1148 what the output 74ls148 be.

The 74LS you 74,s148 is doing just the opposite of what he wants, the takes 3 inputs and expands it to 8, he is taking 8 inputs and encoding it as 3. EI pin-5 must low connect to ground. If it has 10 switches, then I assume you 74ls148 pin, not pin. 74ls148 read the question in dyslexic manner.

The output still remained on a HIGH state, around 4.

74LS – 8 to 3 Binary Priority Encoder

74ls148 clicking “Post Your Answer”, you acknowledge that you have read our updated terms of service74ls148 policy and cookie policyand that your 74ls148 use of the website is subject to these policies. Post as a guest 74ls148. Sign up using Email and Password. 74lls148 then tried connecting some inputs, along with their resistors, to the Ground. Sign up using Email and 74ls148. With your DIP switch connected as described you will need to provide a way for the inputs of 744ls148 decoder chip to go low when the switch is off.

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I’d could really use a little help. Stack Overflow works 74lls148 with JavaScript 74ls148. This is why the outputs of the encoder are always high — if the switches are off, the floating 74ls148 act 74ls148 high inputs, and when a switch is on it is also driving the input high.

Sign up using 74ls148. That said, 74lss148 using a chip like the LS you may want to rearrange the connections as 74ls148 below 74ls148 use pullup resistors to establish the high levels on the inputs to the chip.