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Digital MUX


#1

Hey guys - I’m out of UARTs.

Any MUX you’d recommend that’s two channel, in order to be able to communicate with more non-real-time devices?


#2

Hi Xarren,
have you thought about using an USB hub and some serial converters?

And have you seen this? http://www.maxim-ic.com/app-notes/index.mvp/id/588
I haven’t used ist yet, but it looks promising.

Regards
Daniel


#3

That chip looks like just what I need, thanks.

And USB hub and some serial converters? No clue what you mean here mate, but I’m going for a relatively compact design, so I guess the answer is an outright no :).


#4

By USB hub, I thought of a one chip solution like these two:
http://focus.ti.com/lit/ds/symlink/tusb2077a.pdf
http://www.stericsson.com/technical_documents/CD00222694.pdf

And then connect a couple of FT232Rs to it, which would give you real UARTs, that was my intention.

But if the Maxim is sufficient, I’d give it a go as long as you just need to poll some serial devices.


#5

Yeah the maxim is perfect for me - I have a couple devices I only use sparingly, and actually I really do think more devices should use I2C or SPI. Uart this and uart that gets rather annoying when you have 20 things connected up to your panda.


#6

If you want to use I2C or SPI, this NXP product line may be of interest to you:


It has up to two UARTS and a few GPIOs as well, it would make a nice FEZ shield as a port extender.


#7

Looks pretty neat :).


#8

On a side note, you spend way too much time looking through product catalogues :stuck_out_tongue: