Guest Posted September 9, 2004 Report Share Posted September 9, 2004 Whats the difference of using 74LS247 over 74LS47? Also with 74LS192 over 74LS193? Which of them is more suitable to use? Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 9, 2004 Report Share Posted September 9, 2004 Hi Ciao,You didn't check their datasheets?The 74LS247 adds a tail to the numbers 6 and 9.The 74LS192 is a BCD counter.The 74LS193 is a BINARY counter.Your choice. Quote Link to comment Share on other sites More sharing options...
steven Posted September 10, 2004 Report Share Posted September 10, 2004 :)the 74ls193, is operational amplifier. 74ls low power schottkey series [positive 5 volts supply]. the 74ls195 synch 4 bit u/d counter dual clock . acording to my catalouge here Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 11, 2004 Report Share Posted September 11, 2004 Hi Steven,Nope, the 74LS193 is not an opamp. Just check with Google. Quote Link to comment Share on other sites More sharing options...
steven Posted September 11, 2004 Report Share Posted September 11, 2004 :) Quote Link to comment Share on other sites More sharing options...
steven Posted September 11, 2004 Report Share Posted September 11, 2004 i apoligise any op amps if there are, must be some where else on the same page . Quote Link to comment Share on other sites More sharing options...
steven Posted September 11, 2004 Report Share Posted September 11, 2004 i cant figure out why there aint no op amps dispite what the page says at the top Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 11, 2004 Report Share Posted September 11, 2004 Hi Steven,Yes, they seem to call any kind of IC an opamp.Somebody probably told them that an opamp is an IC and that a logic chip is also an IC, so they thought, "Hmmm, they are both the same". ;DI have a catalog that lists hundreds of LEDs and their important spec's like "maximum reverse voltage" and "maximum forward voltage". But all of them have the same 5V maximum reverse voltage and all the red ones have the same 2.0V maximum forward voltage. They didn't have enough room on the page to list "brightness" and "viewing angle", which is what most people look for. ;D Quote Link to comment Share on other sites More sharing options...
steven Posted September 11, 2004 Report Share Posted September 11, 2004 :)audio guru the truth is out there Quote Link to comment Share on other sites More sharing options...
surajbarkale Posted September 13, 2004 Report Share Posted September 13, 2004 just a humble question - How an opamp can be a Synchronous 4-Bit Up/Down Counter[\b] ??? I think Texas Instru. might have something to say http://focus.ti.com/docs/prod/folders/print/sn74ls193.html Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 13, 2004 Report Share Posted September 13, 2004 Hi Suraj,IC manufacturers also make mistakes, even on their datasheets.Look at the protection diode that is recommended by Panasonic in figure 2 on page 10 of their 79Lxx negative voltage regulator datasheet:http://rocky.digikey.com/WebLib/Panasonic/Web%20data/AN79Lxx,AN79LxxM%20Series.pdfIt is backwards and shorts out the entire regulator! Quote Link to comment Share on other sites More sharing options...
surajbarkale Posted September 14, 2004 Report Share Posted September 14, 2004 :o look at that! now whome do we trust? I guess now i have to burn too many ic's trying to figure out the correct pinout ;D guess what most of my failed circuits were working fine & i just got the wrong datasheets ;D Quote Link to comment Share on other sites More sharing options...
MP Posted September 16, 2004 Report Share Posted September 16, 2004 ::)MP Quote Link to comment Share on other sites More sharing options...
ante Posted September 16, 2004 Report Share Posted September 16, 2004 MP,I remember not long ago you commented, Quote Link to comment Share on other sites More sharing options...
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