I use a TS-7260 to talk to a couple UART devices. I use the MAX232
chip to translate between the com ports on the 7260 and the TTL level
UART on my external devices. Is this what you are trying to do (as
opposed to the TS-7400 being your TTL side, and something else is the
rs-232)? If so, it works fine for me. If you have any trouble, I can
provide you schematics for various translations I have used in the past.
-Terrance
--- In Doug Chapman <> wrote:
>
> I just got my TS7400 today, (it was rush ordered because I just
fried my 7250, very sad). I am rushing to get a robot ready for the
Trinity College competition in a few weeks.
>
> I was just about to pull out my MAX233 chip out of the drawer to
hook up a TTL - RS232 converter. Before I do are these pins 5V
tolerant or are they limited to 3.3V. I searched for posts and found
some discussions but nothing authoritative. From the MAX233 spec
sheet it appears this chip is 5V only.
>
> I also plan on having the second serial port communicate with an
other 5V serial device. If the 7400 is limited to 3.3v does anybody
have a suggestion for a 3.3V - 5V serial translator?
>
>
> thanks,
>
> - Doug
>
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