Site Overlay


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, .

Author: Nasar Duzuru
Country: Bolivia
Language: English (Spanish)
Genre: Love
Published (Last): 6 April 2004
Pages: 397
PDF File Size: 9.55 Mb
ePub File Size: 12.45 Mb
ISBN: 171-9-61452-311-8
Downloads: 65388
Price: Free* [*Free Regsitration Required]
Uploader: Jur

Does it have to be 8 data lines? Mar 24, 9. Some of them are: Need help with circuit!

74LS157 – Quad 2-In Multiplexer Noninv

Only one digit output. Mar 24, 8. Dec 29, 1, This signal tells the multiplexer which number, A or B, to present at datssheet outputs, and it tells the demultiplexer which digit to drive.

Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user.


Mar 23, 2. Ok thanks for the help!

Need help with circuit Posted by karaandnick in forum: Mar 23, 4. Do you already have an account? You May Also Like: You can move part of the multiplexing task to your software and use only 6 signals from the uC.

Search the history of over billion web pages on the Internet. I 1 0.

7ls157 9, the 7 segment doesn’t display A,B,C,etc. A 4-bit word is selected from one of two sources and is routed to the four outputs.

74LS157 Quad 2-Input Multiplexer

The “Absolute Maximum Ratings” are tfiose values beyond which the safety of the device cannot be fatasheet teed. Once you understand how this one “works” and what is wrong with it, that will guide an alternative design. Two displays, two decoders each with 7 resistors8 data lines four to eachand you’re done. Absolute Maximum Ratings Note Note: And how can I make this display 2 digit outputs? Note that the circuit you linked actually needs 9 signals to operate, and is overly complex in my opinion.


74LS Quad 2-input Multiplexer IC | Jaycar Electronics

Need help with circuit — 74ls decoder and 74ls multiplexer. The LS presents true data whereas the LS presents inverted data to minimize propagation delay time. Since that option is no longer an option, we move on. Also, each switch input to the chips needs a 10K pulldown resistor.

Need Help with circuit and components!! Mar 23, 6.

74LS – Grahams Wiki

I can design a better replacement, but that’s your job. 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. Given that the two number dtasheet are static at the multiplexer input, the circuit is overly complex.

I was browsing for an electronics project and came by to this.