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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Looks like an SR is my only choice here, but my brain is just a drop of the ocean. 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 datasjeet design of the traces.

Thank you all for your help!

CD4044 PDF Datasheet浏览和下载

No system this complex has shown up on this site. However the doubt stand. Home Questions Tags Users Unanswered. 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.

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. SNN simply has all of its reset inputs internally connected.

You can achieve the same externally in your PCB design, very easily albeit with a lower density, you’re right. As has been said, you can dataseet this function from more 74HCT-etc gates.

CD (INTERSIL) PDF技术资料下载 CD 供应信息 IC Datasheet 数据表 (1/10 页)

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. 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.


Zio Stampella 8 3. Their later comment says the MCU would be sleeping, before you posted your ‘answer’. Any cd044 on how to implement this otherwise?

CD4044 Datasheet

See line 1 of the question, it suggests the OP’s considered that. Path-wise, the design difference wouldn’t look enormous, but would still be an improvement: 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.

I think you need to re-evaluate how much power is required by “keeping the interrupts datashedt. In this scenario a common reset channel on the IC would help maximizing the numbers of available latches in the same footprint and make the circuit more elegant and simple. Email Required, but never shown. The dataeheet is that I have 4 separate resets, while ideally I would need only one.

Most MCUs inputs can’t be configured with internal pull-downs, only with pull-ups. 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. Basically the MCU would read these lines at regular intervals minutes? 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.

The CD is indeed the one I have in the design now. So you may then want to consider another alternative. Thanks for the reply. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. A state change on the inputs would wake the MCU – whereupon it reads the datashert and then goes back to sleep.


Look for “Wake-up on pin change”, not interrupt. Hi, thanks for the reply! For this to work you need a pull-down resistor on cc4044 output.

I would disagree, but I may be missing the picture here. Post as a guest Name. Is there a reason why you have to use the fewest ICs? I would probably need to contemplate it for quite some time to fully grasp it.

You matter to me! I want to keep it flexible, both capability and power-usage wise and this requires balance. Sourcing it could be really troublesome. Historical anecdotes on my other uses for RS latches. On processors such as the Atmel AVR that power is in the single microamp region – the clock doesn’t need to be running. OTOH, you might way to use the common enable in the CD to implement the solution you’re looking for. 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.

Sign up using Facebook. Can’t yet wrap my head around applying a D or JK that way. However is practically impossible to find good supply of it and even a datasheet. But you all know how it works 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.

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.