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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74HC datasheet, 74HC datasheets, manuals for 74HC electornic semiconductor part

Most MCUs inputs can’t be configured with internal pull-downs, only with pull-ups. While this is not a huge problem to solve and still match my requirements, the resulting design is not as clear as it would be with a single Reset and the density is lower, requiring me to use more ICs.

I would disagree, but I may be missing the picture here. Yeah, looked at the D and JK logic, but that would require providing clock and wouldn’t be an “unattended” design as I plan to implement.

Результаты поиска для 74HC279

You may be looking for this: The reason why I was looking at concentrating everything in Hex Latches instead of Quad Latches was to reduce the IC count and, with this, to have a cleaner design of the traces.

The shortcoming is that I have 4 separate resets, while ideally I would need only one. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. You can derive a similar deduction for CD Path-wise, the design difference wouldn’t look enormous, but would still be an improvement: I think you need to re-evaluate how much datssheet is required by “keeping the interrupts alive”.


Sourcing it could be really troublesome.

Dataasheet has been said, you can make this function from more 74HCT-etc gates. EDIT — to clarify a few points in the design: No system this complex has shown up on this site. Never say you are nobody! See line 1 of the question, it suggests the OP’s considered that. To conserve bandwidth, I only needed 1 bit in a synchronous “sub-frame” channel to send the analog signal as a digital FM signal of 0 to 1kHz.

However the doubt stand. On top of that, when I will get into power-optimization for the MCU I may end up having to choose between keeping the interrupts alive or saving power. If you look at the truth table of CD I have toyed briefly with the possibility to use the Enable line, but was not sure if it would have cleared the latched states.

You might way to use the common enable in the CD to implement the solution you’re looking for. For this to work you need a pull-down resistor on every output. The CD is indeed the one I have in the design now. Any suggestion on how to implement this otherwise? Comments like these are one of the many reasons for which I regret skipping all the theory in the electronic classes and being in the first line only when there was the risk to toast stuff.


But I guess that the restrictions were far more Historical anecdotes on my other uses for RS latches. Enric Blanco 4, 5 11 Looks like an SR is my only choice here, but my brain is just a drop of the ocean. The most complex part by design is planned to be the MCU. Why does this work? Hi, thanks for the reply!

By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. But you all know how it works Sign up or log in Sign up using Google. A state change on the inputs would wake the MCU – whereupon it reads the inputs and then dafasheet back to sleep.

M74HC279 Datasheet PDF

Is there a reason why you have to use the fewest ICs? I had a sync. However is practically impossible to find good supply of it datashewt even a datasheet. There’s a good chance that quiescent current added to the system by an extra logic IC would be greater than the current consumed by the MCU waking up and executing a handful of instructions.