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.
|Country:||Sao Tome and Principe|
|Published (Last):||17 December 2009|
|PDF File Size:||18.56 Mb|
|ePub File Size:||2.9 Mb|
|Price:||Free* [*Free Regsitration Required]|
That said, when using a chip like the 74ls148 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. 74ls148, do you mean it could work just by 74sl148 the common lead of the switches to ground without needing any pull-up resistors?
Galux Trabakoulas 14 3. Sign 7l4s148 using Email and Password. So you can just move your common lead from VCC to 74ls148 and try it.
This is why the outputs of the encoder are always high — if the switches are off, the 74ls148 inputs act as high inputs, and when a switch is on it 74ls148 also driving the input high. Post as a guest Name.
I don’t know why you are connecting the enable lines of the ‘ G1, G2A and B to switches also.
Sign up or log in Sign 74ls148 using Google. I think you should 74ls148 a bleeder resistor at output to draw some constant current.
74LS 8 To 3 Priority Encoder
74LS148 – 8 to 3 Binary Priority Encoder
In any case, in your example 74ls148 inputs A, B and C should come from switches. 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 74ls148.
Wildan Maulana Syahidillah 3 1 4. I’d 74ls148 74ls18 use a little help. I read the question in dyslexic manner.