If you need to go a mile, RS485 is your ticket. TTL is useless unless=20
you are 6 inches from your destination.

Indeed, some devices are awesome. The DS14C89 is absolutely unmatched to=20
reject noise; I've used them
as inter-circuit devices when the environment is noisy, such as in RF=20
transmitters, motors, etc.

--Bob A



On 4/12/2014 1:46 AM, William "Chops" Westfield wrote:
> On Apr 7, 2014, at 2:05 PM, Jesse Lackey wrote:
>
>> If possible, you could use RS-485 instead of TTL-level.
> Real rs232 would be better than TTL, too.  Aside from the wider voltage m=
argins,
> I think real rs232 has somewhat controlled impedance.  And most modern co=
nverter
> chips will include some ESD protection as well.
>
> BillW
>
>

--=20
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