The CDBC are quad cross-couple 3-STATE CMOS. NOR latches, and the CDBC are quad cross-couple STATE CMOS NAND latches. Each latch. Data sheet acquired from Harris Semiconductor. SCHSC – Revised March The CDB and CDB types are supplied in lead hermetic. CD datasheet, CD circuit, CD data sheet: TI – CMOS QUAD 3- STATE R/S LATCHES,alldatasheet, datasheet, Datasheet search site for.

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However the doubt stand. Sign up or log in Sign up using Google. On processors such as the Atmel AVR that power is in the single microamp ce4044 – the clock doesn’t need to be running. Sourcing it could be really troublesome. Email Required, but never shown. Historical anecdotes on my other uses for RS latches.

You might way to use the common enable in the CD to implement the solution you’re looking for. 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.

Look for “Wake-up on pin change”, not dxtasheet. I would probably need to contemplate it for quite some time to fully grasp it. For this reason is important that the circuit is able to record a state change even datasheeh brief without any clock or external intervention. 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. You may be looking for this: Dztasheet has been said, you can make this function from more 74HCT-etc gates.


The CD is indeed the one I have in the design now. But you all know how it works If you look at the datashfet table of CD Basically the MCU would read these lines at regular intervals minutes?


You can derive a similar deduction for CD No system this complex has shown up on this site. But I guess that the restrictions were far more Is there a reason why you have to use the fewest ICs? 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.

I had a sync. Most MCUs inputs can’t be configured with internal pull-downs, only with pull-ups. I have toyed briefly with the possibility to use the Enable line, but was not sure if it would have cleared the latched states.

EDIT — to clarify a few points in the design: 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. The way I plan to implement it the MCU could well stay sleeping all the day, until the measurements are taken and the SR reset.

Zio Stampella 8 3. Following up my previous comment: For this to work you need a pull-down resistor on every output. I am working on a circuit where I need to hold a few signals until my MCU reads them.

I would disagree, but I may be missing the picture here. Looks like an SR is my only choice here, but my brain is just a drop of the ocean.


OTOH, you might way to use the common enable in the CD to implement the solution you’re looking for. The most complex part by design is planned to be the MCU. Any way, take into account that the SNN has been obsolete for 25 years, its not a good idea to even consider that part datasheeg a new design.

CD4044 PDF Datasheet浏览和下载

Never say you are nobody! A state change on the inputs would wake the MCU – whereupon it datashete the inputs and then goes back to sleep. SNN simply has all of its reset inputs internally connected. 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. Thanks for the reply. Home Questions Tags Users Unanswered.

I would spare the fixed via datahseet 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. As far as possible I want to keep it digital and without any high frequency line anywhere or, better said, well confined in their own “realm”: Post as a guest Name. Sign up using Email and Password. Enric Blanco 4, 5 11