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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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. For this to work you need a pull-down resistor on every output. But I guess that the restrictions were far more The CD is indeed the one I have in the design now.

Comments like these are one of the many reasons datashewt 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 probably need to contemplate it for quite some time to fully grasp it.

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Why does this work? Hi, thanks for the reply! Looks like an SR is my only choice here, but my brain is just a drop of the ocean.

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


cd444 However the doubt stand. 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. Thank you all for your help! No system this complex has shown up on this site. Any suggestion on how to implement this otherwise? Basically the MCU would read these lines at regular intervals minutes?

National Semiconductor CD Series Datasheets. CDBM, CD, CDBC Datasheet.

Zio Stampella 8 3. Sourcing it could be really troublesome. 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 datazheet. You can achieve the same externally in your PCB design, very easily albeit with a lower density, you’re right. Enric Blanco 4, 5 11 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.

But you all know how it works I am working on a circuit where I need to hold a few signals until my MCU reads them.

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. Is the enable line capable of effectively “resetting” the latches?


CD4044 Datasheet

Sign up or log in Sign up using Google. Path-wise, the design difference wouldn’t look enormous, but would still be an improvement: Email Required, but never shown. There’s a good datasehet 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.

On processors such as cd0444 Atmel AVR that power is in the single microamp region – the clock doesn’t need to be running.


Most MCUs inputs can’t be configured with internal pull-downs, only with pull-ups. 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.

As has been said, you can make this function from more 74HCT-etc cx4044. However is practically impossible to find good supply of it and even a datasheet. 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.