Part Number: 74LS, Maunfacturer: National Semiconductor, Part Family: 74, File type: PDF, Document: Datasheet – semiconductor. 74LS SN74LSD. ACTIVE. SOIC. D. Green (RoHS. & no Sb/Br) . Reproduction of significant portions of TI information in TI data sheets is. Multiplexers & Demultiplexers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas Instruments 74LS Encoders, .

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Mar 24, 9. I probably need to use the 8 data pins of a parallel cable and to create the respective program in assembly language. Not sure if you have it in your sim Absolute Maximum Ratings Note Note: The “Absolute Maximum Ratings” are tfiose values beyond which the safety of the device cannot be guaran- teed.

Two displays, two decoders each with 7 resistors8 data lines four to eachand you’re done. The Motorola MC datasheet has the connection details. Your name or email address: Not more than one output should be shorted at a time, and the duration should not exceed one second.

The BCD parts would be perfect if you can find them. Quote of the day. Dec 29, 1, You don’t say what it is you want to do. It would actually be easier and cheaper to directly datashet two decoders as in suggestion 1 above.


I dwtasheet design a better replacement, but that’s your job. This signal tells the multiplexer which number, A or B, to present at its outputs, and it tells the demultiplexer which digit to drive. Also, each switch input to the chips needs a 10K pulldown resistor.

SN54/74LS Motorola QUAD 2-INPUT MULTIPLEXER ChipFind Datasheet Archive |

It is possible to do this with 5 lines, but you’ll have better control over the display with 6. Then I’ll create a program from Microprocessor using assembly language. So are there other bcd to 7 segment ICs that will properly display the hexadecimal output?

What we’ve been doing in school is that our professor gives out a schematic and then we replicate the schematic in EAGLE and then create the hardware using pcbs. Need help with circuit! The device should not be operated at these limits. Do you have any more ideas that could use 8 data lines? Mar 23, 3. Just so you guys know, I have literally zero knowledge in creating my own schematics.

Mar 25, Aug 1, 7, 2, Need Help with circuit and components!!

I know it’s my job so I’ll somehow figure this out. Posted by Raptor in forum: Ok thanks for the help!

But I dont think you have it in multisim. Mar 23, 1.

74LS datasheet, Pinout ,application circuits Quad 2-Input Data Selector/Multiplexer

You can do that without the multiplexing circuit shown. Two displays, one with one set of seven resistors, two transistors as digit drivers. Does it have to be 8 data lines? Note that the circuit you linked actually needs 9 signals to operate, and is overly complex in my opinion. The schematic still lacks something. It is able to display directly from the outputs of ‘ to 0-F in 7 segment format. Need help with circuit — 74ls decoder and 74ls multiplexer. Note that there are a couple of electrical errors in the schematic, and it will not function as drawn.


I was browsing for an electronics project and came by to this. Since that option is no longer an option, we move on. Mar 24, 8.

A 4-bit word is selected from one of two sources and is routed to the four outputs. A 4 bit binary adder circuit. Then the controlling system toggles the Data Delect signal.

You can move part of the multiplexing task to your software and use only 6 signals from the uC. Mar 23, 7.

74LS157 Quad 2-Input Multiplexer

Mar 23, 2. The “Recommended Operating Conditions” table will define the conditions for actual device operation. These sit at the inputs of the multiplexer. You May Also Like: This would drive two digits. Mar 23, 5.