Akeel Posted January 13, 2010 Report Share Posted January 13, 2010 Please I can't find these TTL datasheets any where : 74188,74287,74288,74387 Quote Link to comment Share on other sites More sharing options...
Hero999 Posted January 13, 2010 Report Share Posted January 13, 2010 They're probably obsolete.Try searching for the LS or HC equivalents i.e 74HC188 or 74LS188, no one uses TTL any more, it's inferior and more expensive as it's not made any more. I remember looking for the 7400 at Maplin and noticed how much more expensive it was than the 74LS00 and that was 15 years ago. Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted January 15, 2010 Report Share Posted January 15, 2010 74188: 256-bit (32x8) Programmable read-only memory with open collector outputs 74287: 1024-bit (256x4) Programmable read-only memory with three-state outputs 74288: 256-bit (32x8) Programmable read-only memory with three-state outputs 74387: 1024-bit (256x4) Programmable read-only memory with open collector outputs Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted January 15, 2010 Report Share Posted January 15, 2010 Okay it took me a while but here is what I found.All 4 of them. 2 here and 2 more in the next post.DM74S188.pdfdm74S287.pdf Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted January 15, 2010 Report Share Posted January 15, 2010 Here are the other 2DM74S288.pdfDM74S387.pdf Quote Link to comment Share on other sites More sharing options...
Hero999 Posted January 15, 2010 Report Share Posted January 15, 2010 No wonder you found it hard to find the datasheets, they're obviously long gone obsolete.Use a more modern RROM or EEPROM. Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted January 27, 2010 Report Share Posted January 27, 2010 1 post for that guy. never replied back. what a waste of my time finding them for a ghost. Quote Link to comment Share on other sites More sharing options...
Hero999 Posted January 27, 2010 Report Share Posted January 27, 2010 It is annoying when that happens.I often ask another question and only before I bother to do something.if they reply.Never mind the datahseets are now here for anyone else that wants them, until the forum crashes again and we loose all the posts. Quote Link to comment Share on other sites More sharing options...
rakeshkoku Posted February 19, 2010 Report Share Posted February 19, 2010 It is annoying when that happens. Quote Link to comment Share on other sites More sharing options...
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