Remember that the MAX232 device has startup problems with the charge pumps,
use the MAX202 instead.

>Well, I can see putting one on the outputs to decrease the dammage due to
>shorts.  The inputs could be for similar reasons.
>
>It could just be SOP for transdata, or someone didn't want to re-engineer a
>serial interface and simply took one from another project which required extra
>protection.
>
>-Adam
>
>"Don B. Roadman" wrote:
> >
> > I've not used Maxim's MAX232 chip before. I need to use one for a
> > home made mplab ICD. I noticed that microchip uses 100 ohm
> > resistors at all the serial outputs and inputs. But, I don't see any
> > reference to this in the Maxim data sheets. Are these neccesary?
> > In maxims data sheets there are typical application circuits and I
> > don't see any resistors so I assumed the chip itself takes care of
> > input loads and output current limiting to conform the rs 232.

Regards

Adrian
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