19 Jun
2013
19 Jun
'13
3:53 p.m.
> > 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?)?
On Wed, 19 Jun 2013, Tony Duell
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?