3 Jun
2009
3 Jun
'09
9:03 a.m.
On Wed, Jun 3, 2009 at 11:37 AM, Dave McGuire <mcguire at neurotica.com> wrote:
On Jun 3, 2009, at 12:06 AM, Jay West wrote:
Formally, yes, that's the max signalling voltage, but in practice,
there's a lot of 1488/1489 circuits powered by 7812s and 7912s out
there. I am pretty sure that the MAX232 can't get things better than
about +/-10V (but I could be mistaken about that).
-ethan
These devices had a lot of trouble with RS423, where the voltage was much
less than RS232. I don't recall the exact numbers but RS232 was something
about 12V swings
?+/- 15V