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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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Sourcing it could be really troublesome.

CD4044 PDF Datasheet浏览和下载

Their later comment says the MCU would be sleeping, before you posted your ‘answer’. I have toyed briefly with the possibility to use the Enable line, but was not sure if it would have cleared the latched states.

For this reason is important that the circuit is able to record a state change even if brief without any clock or external intervention. 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.

As has been said, you can make this function from more 74HCT-etc gates. Look for “Wake-up on pin change”, not interrupt. To conserve bandwidth, I only needed cd4404 bit in a synchronous “sub-frame” channel to send the analog signal as a digital FM signal of 0 to 1kHz.

You may be looking for this: But you all know how it works Thank you all for your help! I would probably need to contemplate it for quite some time to fully datasheeh it. Zio Stampella 8 3.



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. Looks like an SR is my only choice here, but my brain is just a drop of the ocean. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Datazheet.

Following up my previous comment: I want to keep it flexible, both capability and power-usage wise and this requires balance. I had a sync. Can’t yet wrap my head around applying a D or JK that way. 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”: Most MCUs inputs can’t be configured with internal pull-downs, only with pull-ups.

The shortcoming is that I have 4 separate resets, while datasbeet I would need only one. 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.

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CD4044 Datasheet

However is practically impossible to find good supply of it and even a datasheet. 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.

Backup question maybe deserving its own question: 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 alive”.

CD Datasheet(PDF) – TI store

The reason why I was looking cd40044 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. Sign up using Facebook. Sign up using Email and Password. Path-wise, the design difference wouldn’t look enormous, but would still be an improvement: On processors such as the Atmel AVR that power is in the single microamp region – the clock doesn’t need to be running.

Datashest would disagree, but I may be missing the picture here. Is the enable line capable of effectively “resetting” the latches? EDIT — to clarify a few points in the design: SNN simply has all of its reset inputs internally connected. 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. Email Required, but never shown. MCU, comms module and voltage regulation sections.

The most complex part by design is planned to be the MCU. Thanks for the reply. But I guess that the restrictions were far more I am working on a circuit where I need to hold a few signals until my MCU reads them.