74HC Datasheet, 74HC PDF, 74HC Data sheet, 74HC manual, 74HC pdf, 74HC, datenblatt, Electronics 74HC, alldatasheet, free. 74HC,TC74HCAP, CMOS quad S-R latch by Toshiba,Download Toshiba TC74HCAP datasheet. SN74LSA. (ACTIVE) Quad /S-/R latches. Datasheet ( KB). Description click to collapse contents. The ‘ offers 4 basic S\-R\ flip-flop latches in one.
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As has been said, you can make this function from more 74HCT-etc gates. I would spare the fixed via to the enable having it routed to the MCU and used to control the reset AND the enable itself and would have all the resets linked together in a clean way.
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Their later comment says the MCU would be sleeping, before you posted your ‘answer’. Sign up using Email and Password.
However is practically impossible to find good supply of it and even a datasheet. Thanks for the reply. Can’t yet wrap my head around applying a D or JK that way. Looks like an SR is my only choice here, but 74hc2779 brain is just a drop of the ocean. The reason why I was looking at concentrating everything in 74hc2799 Latches instead of Quad Latches was to reduce the IC count and, with this, to have a cleaner design of the traces.
Is the 74ch279 line capable of effectively “resetting” the latches? I am working on a circuit where I need to hold a few signals until my MCU reads them. Never say you are nobody!
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Any way, take into account that the SNN has been obsolete for 25 years, its not a dtaasheet idea to even consider that part for a new design. But you all know how it works I had a sync.
Path-wise, the design difference wouldn’t look enormous, but would still be an improvement: You may be looking for this: Historical anecdotes on my other uses for RS latches. So you may then datassheet to consider another alternative.
While not the ideal for the approach here simple, cheap and reliable circuit, with only the MCU as “critical complexity”I believe that your comment may deserve an answer by itself for posterity. You will then need pull-ups on every output instead of pull-downs, so just use the pull-ups of the MCU inputs by configuring it accordingly. Sign up using Facebook.
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Hi, thanks for the reply! EDIT — to clarify a few points in the design: I want to keep it flexible, both capability and power-usage wise and this requires balance.
No system this complex has shown up on this site. Most MCUs inputs can’t be configured with internal dataseet, only with pull-ups. A state change on the inputs would wake the MCU – whereupon it reads the inputs and then goes back to sleep.
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The way I plan to implement it 74hc297 MCU could well stay sleeping all the day, until the measurements are taken and the SR reset. Is there a reason why you have to use the fewest ICs?
You matter to me! See line 1 of the question, it suggests the OP’s considered that.