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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SNN simply has all of its reset inputs internally connected.

CD Datasheet Texas Instruments pdf data sheet FREE from

Email Required, but never shown. Fatasheet 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. Can’t yet wrap my head around applying a D or JK that way.

I am working on a circuit where I need to hold a few signals until my MCU reads them. Basically the MCU would read these lines at datasgeet intervals minutes? On processors such as the Atmel AVR that power is in the single microamp region – the clock doesn’t need to be running.

CD4044 PDF Datasheet浏览和下载

Sign up using Email and Password. For this to work you need a pull-down resistor on every output. Any suggestion on how to implement this otherwise?

Path-wise, the design difference wouldn’t look enormous, but would still be an improvement: Is there a reason datasheet you have to use the fewest ICs? Zio Stampella 8 3.

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. See line 1 dataseet the question, it suggests the OP’s considered that. The most complex part by design is planned to be the MCU.


Following up my previous comment: I had datasheer sync. Backup question maybe deserving its own question: You can derive a similar deduction for CD Sign up using Facebook.

Their later comment says the MCU would be sleeping, before you posted your ‘answer’.

Is the enable line capable of effectively “resetting” the latches? 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. Home Questions Tags Users Unanswered. Historical anecdotes on my other uses for RS latches. MCU, comms module and voltage regulation sections. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy ddatasheet cookie policyand that your continued use of the website is subject to these policies.

Post as a guest Name. 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. However is practically impossible to find good supply of it and even a datasheet.

Tony EE rocketscientist Hi, thanks for the reply! I have toyed briefly with the possibility to use the Enable line, but was not sure if datasheeh would have cleared the latched states. Sourcing it could be really troublesome.

You matter to me! If you look at the truth table of CD A state change on the inputs would wake the MCU – whereupon it reads the inputs and then goes back to sleep. Never say you are nobody! 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.

Yeah, looked at the D and JK logic, but that would require providing clock and wouldn’t be satasheet “unattended” design as I plan to implement. While not the ideal for the approach here simple, cheap and reliable circuit, with only the MCU as “critical complexity”I cdd4044 that your comment may deserve an answer by itself for posterity. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.


Thank you all for your help! I think you need to re-evaluate how much power is required by “keeping the interrupts alive”. 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.

I would disagree, but I may be missing the picture here. Any way, take into account that the SNN has been obsolete for 25 years, its not a good idea to even consider that part for a new design. OTOH, you might way to use the common enable in the CD to implement the solution you’re looking for. I would spare the fixed via to the enable having it routed to the MCU and dataheet to control the reset AND the enable itself and would have all the resets linked together in a clean way.

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No system this complex has shown up on this site. 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”: 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.

As has been said, you can make this function from more 74HCT-etc gates. The way I plan to implement datsheet the MCU could well stay sleeping all the day, until the measurements are taken and the SR reset. Enric Blanco 4, 5 11 Thanks for the reply.