Shahriar Posted April 21, 2005 Report Share Posted April 21, 2005 HiI need an IC (i.e. 74XXX Series) with 8 or more outputs. The outputs will be enabled on by on after each other when I trigger the Clock pulse Input. the important note is that the outputs should stay enabled until I reset the IC.ThanX in advanceShahriar Quote Link to comment Share on other sites More sharing options...
Ldanielrosa Posted April 21, 2005 Report Share Posted April 21, 2005 With that requirement, you're not likely to find many chips that fit the bill. You'll probably have to use an FPGA. Quote Link to comment Share on other sites More sharing options...
EdwardM Posted April 21, 2005 Report Share Posted April 21, 2005 Hi ShahriarLooks like an ideal and simple job for a PIC - perhaps 16F84?, Port A 8 bits, Port B 5 bits.Best of LuckEd Quote Link to comment Share on other sites More sharing options...
EdwardM Posted April 21, 2005 Report Share Posted April 21, 2005 Hi againOr alternatively, you could use a series of flip-flops with common clock/clear and Q output taken to D input of next flip-flopBest of LuckEd Quote Link to comment Share on other sites More sharing options...
Shahriar Posted April 22, 2005 Author Report Share Posted April 22, 2005 Yes!Using a series of D Flip-Flps. Tricky ;)ThanX - Shahriar Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted April 29, 2005 Report Share Posted April 29, 2005 http://www.semiconductors.philips.com/acrobat_download/datasheets/74HC_HCT373_CNV_2.pdfhttp://www.semiconductors.philips.com/acrobat_download/datasheets/74HC_HCT563_CNV_2.pdfhttp://www.semiconductors.philips.com/acrobat_download/datasheets/74HC_HCT573_CNV_2.pdf Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted April 29, 2005 Report Share Posted April 29, 2005 How about this?Just add an SCR to each output to make it latch each one.Dropout the power and all will reset. Quote Link to comment Share on other sites More sharing options...
Miles Prower Posted April 29, 2005 Report Share Posted April 29, 2005 I need an IC (i.e. 74XXX Series) with 8 or more outputs. The outputs will be enabled on by on after each other when I trigger the Clock pulse Input. the important note is that the outputs should stay enabled until I reset the IC.I never heard of a 74XX that would do that exact thing. However, I did design a circuit that accomplishes the same thing. You could drive it with something like a ring counter (4071) or use a binary counter driving the address lines of a 3-line-to-eight-line decoder. Once you run that, you will have eight lines that go high in succession, and stay high until you reset.This works since I have built it. Quote Link to comment Share on other sites More sharing options...
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