74LS148 EBOOK

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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Since the the inputs to the 74LS are active 74ls148, you actually want the common lead of all the switches to go to ground, instead of VCC. That 74ls148, when using a chip like the LS you 74ls148 want to rearrange the connections as shown below and use pullup resistors to establish the high levels on the inputs to the chip.

Post as a guest Name. I repeated the entire process with 74ls148 74LS IC to make sure the first one was working. 74ls148

74LS – 8 to 3 Binary Priority Encoder

This site uses cookies to deliver our services 74ls148 to show you relevant ads and job listings. Galux Trabakoulas 14 3. EI pin-5 74ls148 low connect to ground. Join Stack Overflow to learn, share knowledge, and build your career.

74LS148 – 8 to 3 Binary Priority Encoder

Post as a guest Name. I think you should include a bleeder resistor at 74ls148 to draw some 74ls148 current. Wildan Maulana Syahidillah 3 1 4. Sign up or log in Sign up using Google.

This will help 7l4s148 function as desired. Besides tying the common lead 74ls148 the switches to ground, I would also connect 4. Sign up using Facebook.

This is why the outputs of the encoder are always high — if the switches are off, the floating inputs act as high inputs, and when a switch is on it is also driving the input high. 74ls148 Your Answer 74ls148 By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that 74ls148 continued use of the website is subject to these policies.

This site uses cookies to deliver our services and to show you relevant ads and job listings. Sign up or log in Sign up using Google. If it has 10 switches, then I assume 74ls148 mean pin, not pin. I 74ls148 the resistors as 74ls148 in the picture below, which should give a HIGH state in the output. So there 74ls148 no way to drive any of the inputs low.

74ls148 up using Email and Password. I’d could really use a little help. I then tried using pull up resistors, the use and 74ls148 configuration of which is not entirely clear to 74ls148, which I think is the problem.

With your DIP switch connected as described you will need to provide a way for the inputs of the decoder chip to go low when the switch is off. To be honest, I didn’t 74ls148 know how to use the dip switches, but I get it now, 74ls148.

By clicking “Post Your Answer”, you acknowledge that 74ls148 have read our updated terms of service7ls148 policy and cookie policyand that your continued use of the website is 74ls148 to these 74ls148. Second, make sure your switches are 74ls184 off to begin with, and then turn only one on at a time if you do turn on 74ls148 than one, there is a 74ps148 in the 74LS datasheet which will indicate what the 74ls148 should be. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand 7ls148 Terms 74ls148 Service.

So you can just move your common lead from VCC to ground and try it. 74ls148 Overflow works best with JavaScript enabled. 74ls148

By clicking “Post Your 74ls148, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policy 74ls148, and that 74ls148 continued use of the website is subject to these policies. Sign up using Email and Password.

Motorola – datasheet pdf

74ls148 don’t know why you are connecting the enable lines of the ‘ G1, G2A 74ls148 B to switches also. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy 74ls148and our Terms of Service.

I then tried connecting some inputs, along with their resistors, to the Ground. 74ls148 4, 12 35 Sign up using Facebook. Questions Tags Users Badges Unanswered. The 74LS you show is doing just the opposite of what he wants, the takes 3 inputs and expands it to 8, 74ls148 is taking 8 inputs 74ls148 encoding it 74ls148 3.

I read the question in dyslexic manner. But, 74ls148 you mean it could work just by tying the common lead of the switches to ground without needing any pull-up resistors? I’d still add the pull-ups though.

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This way it will work for both types of chips. In 74ls148 case, in your example only 74ls148 A, B 74ls148 C should come from switches. The output still remained on a HIGH state, around 4.

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