Re: Looking for two-input comparator with hysteresis

Jim Thompson wrote:

But go ahead and use them as clamps... I certainly don't care if your
circuits up and fry for "magical" reasons.

I NEVER rely on ESD diodes for clamping... VERY BAD engineering
practice.

I used them (on a once-off) as power supply rectifier even :)

74HCsomething sync amplifier to use in-line with a monitor that wanted TTL sync while the computer output <1v. The monitor input carries no voltage, thus I had to use external power. I thought.

When I disconnected the power the device kept working. I guess the monitor presented a pull-up when activity was sensed and this powered the device through the protection diode.


Thomas
.