8 Nov
2011
8 Nov
'11
1:30 a.m.
On Nov 8, 2011 1:00 AM, <cctech at vax-11.org> wrote:
One particular TTL <--> RS232 chip (I forget the PN) had the really
annoying
problem of blowing up if it was connected to a powered-up terminal
while the chip was powered down. This may be the cause of your dead UART.
Beyond that I don't have any suggestions.
Clint
Is that the 1489 line receiver? I've had many a 1489 lose its magic smoke
this way when I had an 11/750... ended up socketing that chip and ordering
a dozen or so extras from JDR Microdevices.