[time-nuts] Lightning 1, tbolt 0.

[Bob Camp]

Hi

Like many others, I have had no problems with the Maxim RS-232 chips running at 3.6V. They have a nice table in the data sheet that includes the proper caps for 3.6V operation. The data sheet clearly states that they will run from 3.0 V to 5.5V supplies. They call out the capacitor values as minimums, so even a wide supply range design can be done with fixed values. 

Like any other i/o chip, they are “the first to fail” when you get a nutty voltage issue between two devices. They are pretty rugged, but are not invincible. Lighting is not a friend …

Bob 



> On Apr 1, 2016, at 1:34 AM, Mark Sims <holrum at hotmail.com> wrote:
> 
> On the subject of RS-232 converter chips...  I have had problems running MAX3232's at 3.6V.   Sometimes they work, sometimes they don't.  Sometimes they get freaky hot.   The general symptom seems to be no -6V output.   
> 
> I've never had problems running MAX232A's at 3.6V, even though they are not spec'd for it.  Also,  pay close attention to the recommended cap values,  then maybe ignore them.  I wind up using 0.47 uF caps everywhere (having over 20,000 of the little buggers handy).
> 
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