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Epsilon!
Mad Scientist
Canada
276 Posts |
 Posted - Aug 01 2003 : 12:48:46 PM
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hey, what do you guys prefer to use CMOS (4017,4006 etc) or TTL (7490,74153 etc)
What is better, I prefer CMOS, dunno why...
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Kale
Nobel Prize Winner
Canada
795 Posts |
Posted - Aug 01 2003 : 2:29:41 PM
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Well, CMOS uses a lot less power than TTL, and it is more forgiving of variablilty in input voltage.
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Aug 01 2003 : 2:32:24 PM
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But is a lot more delicate.
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Epsilon!
Mad Scientist
Canada
276 Posts |
Posted - Aug 01 2003 : 3:45:39 PM
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Well, in school we were learnig about latches and flipflops and we made circuits we were usind TTL, 7490. Hardly anyone got them to work, they required 5.25V exactly, and most of the power supplies didnt have the dials 'tuned'.. gave us a whole lot of troube..
keep in mind that it was a gr 10 class
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Chamkeeper
Mad Scientist
278 Posts |
Posted - Aug 01 2003 : 4:56:12 PM
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TTL will typically drive more than the 10 - 15 mA that a CMOS chip will. However if you run your CMOS at 12v instead of 5 you can get almost the same amount of power out.
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CMOS vs. TTL
