74LS148 PDF

74LS, 74LS Datasheet, 74LS pdf, buy 74LS, 74LS 8 to 3 Priority Encoder. 74LS, 74LS 8-to-3 Priority Encoder, 74LSxx Low Power Schottky Series. Texas Instruments 74LS Encoders, Decoders, Multiplexers & Demultiplexers are available at Mouser Electronics. Mouser offers inventory, pricing.

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Sign up or log in Sign up using Google. Galux Trabakoulas 14 3. Please complete 74l148 order processing to add an item to the cart. This will help regulator function as desired.

Your account information matches our records. Please Enter Valid Text. Customers also shopped for. In any case, in your example only inputs A, B and C should come from switches. Remember Me Forgot Password?

Post as a guest Name. Sign up using Facebook. I repeated the entire process with another 74LS IC to make sure the first one was working. So you can just move your common lead from VCC to ground and try it. I then tried using pull up resistors, the use and circuit configuration of which is not entirely clear to 74la148, which I think is the problem. Since the the inputs to the 74LS are active low, you actually want the common lead of 74ls1488 the switches to go to ground, instead of VCC.

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74LS circuit output remains constant regardless to input – Stack Overflow

That said, when using a chip like the LS you may want to rearrange the connections as shown below and use pullup resistors to establish the high levels on the inputs to the chip. Bracket End Fold down Gray.


Adding this “request for a quote” item will require a Quote and prevent checkout. Please enter appropriate zipcode. I connected the resistors as shown in the picture below, which should give a HIGH state in the output. I read the question in dyslexic manner. Your cart has been saved and will be available when you login next time.

74ks148 you want to continue? Besides tying the common lead of the switches to ground, I would also connect 4. The Pro Rata warranty allowance is calculated as:.

IC 74LS148

I then tried connecting some inputs, along with their resistors, 74ls184 the Ground. Kit Observation Light Knob. Cover Tubing Access Light Gray. 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.

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. But, do you mean it could work just by tying the common lead of the switches to ground without needing any pull-up resistors? About Us Contact Us. To be honest, I didn’t really know how to use the dip switches, but I get it now, thanks.


I think you should include a bleeder resistor at output to draw some constant current. If it has 10 switches, then I assume you mean pin, not pin.

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I don’t know why you are 74,s148 the enable lines of the ‘ 74lls148, G2A and B to switches also. What action do you want to perform? Stack Overflow works best with JavaScript enabled.

Post as a guest Name. So there is no way to drive any of the inputs low. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

I’d could really use a little help. The warranty period is 90 days for new, refurbished and repaired parts, and 30 days for used parts, starting on the delivery date of the part.