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Old thread has been locked -- no new posts accepted in this thread
???
06/08/08 17:49
Read: times
#155591
- Yes, it indicates the process technology
Responding to: ???'s
previous message
List of 42 messages in thread
Topic
Author
Date
Input Protection
01/01/70 00:00
I use a series resistor
01/01/70 00:00
I like clamps ...
01/01/70 00:00
I would not use a \'S\' chip
01/01/70 00:00
It's just an array of schottky diodes, Erik
01/01/70 00:00
Resistors and cap
01/01/70 00:00
why the slowpoke
01/01/70 00:00
the technology will still work in this case
01/01/70 00:00
stupid boss
01/01/70 00:00
... or stupid Erik, maybe?
01/01/70 00:00
I did NOT say "stupid engineer"
01/01/70 00:00
now, don't get me wrong here ...
01/01/70 00:00
a typical result of a stupid boss
01/01/70 00:00
well the 74S had me since ....
01/01/70 00:00
Yes, it indicates the process technology
01/01/70 00:00
HEF4021
01/01/70 00:00
Anyhow the major setback using 40xx
01/01/70 00:00
This is entirely wrong!
01/01/70 00:00
No, not better, but different
01/01/70 00:00
Adding another cap
01/01/70 00:00
I do not think so, but it will wear the switch
01/01/70 00:00
Immunity against what?
01/01/70 00:00
No, just a business decision ...
01/01/70 00:00
Uhm...
01/01/70 00:00
all 40xx chips are based on the same technology ..
01/01/70 00:00
if the RC before the PISO doesn't do it ...
01/01/70 00:00
Values
01/01/70 00:00
I do not know why ...
01/01/70 00:00
Values..
01/01/70 00:00
like this
01/01/70 00:00
Caps and RF immunity
01/01/70 00:00
true - and not
01/01/70 00:00
Expensive capacitors?
01/01/70 00:00
BALDERDASH
01/01/70 00:00
the PISO register is loaded only once ...
01/01/70 00:00
I hav no desire to look up 40xx chips, but ..
01/01/70 00:00
If there's nothing pressing ...
01/01/70 00:00
Setup
01/01/70 00:00
overdoing it
01/01/70 00:00
That just might be adeuqate ...
01/01/70 00:00
Switches
01/01/70 00:00
IF you choose the right rate ... and IF you check
01/01/70 00:00
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