19 Jun
2013
19 Jun
'13
5:22 p.m.
On Wed, 19 Jun 2013, Fred Cisin wrote:
Any RS232 port will withsand the TTL signals on a Centronics port. If
it doesn't, it doesn't; comply with the RS223 standard :-) However, the
Centroics Printer (or at least the input buffers on its interface) are
not going to like having 12V RS23 signals shoved into them. I suspect
the printer will emit the magic smoke, not the RS232 buffers
thanks
I wonder what else our lab staff was doing that kept blowing 1488/1489
chips?
ESD or other induced voltage on long cables? I've seen lots of ESD damaged
RS232 transceiver chips, including "modern" SMD stuff from Maxim and
Sipex.
On Wed, 19 Jun 2013, Tony Duell wrote:
I know that
the 1488/1489 combo was popular, but the lead engineer on
the comms project at the time that I was involved insisted that the
75150/75154 combination was much superior. I don't recall what his
reasoning was, but we didn't run into any popped 7515x parts that I
can remember.
How well did those withstand a "centronics" parallel printer being
plugged into the serial port (with a gender changer?)?