[time-nuts] RS485/422/232 Chip

Christian Vogel vogelchr at vogel.cx
Sat Apr 26 06:17:09 EDT 2008


Hi Bruce,
>> The MAXIM  MAX3162E will do RS485/422 and RS232 in the one chip , get samples from maxim.com.
>>     
> These devices only implement a single RS485/RS422 transmitter and receiver.
>   
That's true for the 3160 which can be switched between two RX and two TX 
of RS232 or one RX and one TX of RS485.
The 3162 does both functions simultaneously.

I had a look at the MAX3535E recently, which has a isolated RS485 
transceiver with capacitive coupling in it, did anyone of you use those 
to break ground-loops? I'm especially interested if this kind of 
"capacitor-isolation barrier" adds any significant noise to the RS485 
lines, which might couple into sensitive signals running in parallel, or 
if I should just go the traditional optocoupler-route.

Greetings from Germany,

    Chris





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