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AncientNord , 06-20-2024, 03:14 AM

Who has a lot of experience. Please help me choose two microcircuits.
1. Power Switch - should switch the power, the voltage can be 5V or 9-14, the maximum power of the module is 4 watts.
2. Signal Switch - switches signals

I will be grateful for any help 🙏

Mini , 06-20-2024, 11:05 AM

Too few information. I see you have basically 2 different multiplexer here. Is the multiplexer external IC as I understand? Why do you need microcontroller for that? Does it needs to be driven over uart etc. If not you can use some simple logic and/or buttons. If you need MCU then any MCU can do this. Just drive few outputs based on some inputs. But you need 5V micro here. Any 8 bit micro can do this. Atmel/pic etc. Just have to be 5V capable.

AncientNord , 06-20-2024, 03:44 PM

Thank you for responding, the question is only about choosing a multiplexer. the microcontroller is shown because I found a multiplexer that is controlled by 2 or 3 signals. I'm search for controlled 2 signals... I found something like this FSA2380, I can take two pieces, but I don't understand can I switch power if use FSA2380? In general, I lack the experience to choose multiplexers for what I have drawn🥲

Mini , 06-20-2024, 04:03 PM

Oh sorry I misunderstood you. I thought you are looking for MCU.

Mini , 06-20-2024, 04:04 PM

But switching power is indeed different. I'm not familiar with high current MUX. Have to search that, but I checked your FSA2380 datasheet and I think it can handle max 350 mA so it won't fit.

Mini , 06-20-2024, 04:05 PM

Mini , 06-20-2024, 04:06 PM

Also you don't have to use MUX IC. You can build your own if you can't find proper ones.

QDrives , 06-20-2024, 04:09 PM

Do you want to switch power?
Up to 12V you could simply use a P-channel mosfet. Not a MUX (MUtually eXlusive) though. For voltages higher than the MCU you need a NPN transistor too.

AncientNord , 06-20-2024, 04:12 PM

Is there a similar microcircuit on transistors for switching power? or need to do on transistors?

QDrives , 06-20-2024, 04:19 PM

What do you mean with microcircuit? Do you mean Integrated Circuit (IC)?
If you want ICs for switching power (again not a MUX) there are plenty from ST https://www.st.com/en/automotive-analog-and-power/high-side-switches/products.html

Mini , 06-20-2024, 04:22 PM

He obviously means all in one solution as IC(one chip that does it all). One chip so don't have to make a schematic himself(using multiple transistors etc). But yeah high-side switches are worth to search for.

QDrives , 06-20-2024, 04:25 PM

There are no such devices to my knowledge. There is no need for such devices too. Simply because the voltage, current, etc. ranges to much.

AncientNord , 06-20-2024, 04:28 PM

So the general concept is this. to switch power, I need to find an IC or do it on transistors, and to switch the signals I can use a MUX

QDrives , 06-20-2024, 04:32 PM

What voltage and current are the currents? For signals (<10mA and <=5V) there are plenty of MUX chips https://www.digikey.nl/en/products/filter/logic/signal-switches-multiplexers-decoders/743