Not exactly. I did indicate that if the rise time of Vcc was slow, the PSU was inadequate.
What is a PSU?

I'd be interested in how you do that with a signal that's active-high and pulled down, yet driven with a totem pole.
answered, at least, twice in this thread.


2) who on eatrh would, these days. use a TTL supervisor?
Who knows? I doubt there were such things when TTL was the prevailing technology.
so all thjat stuff about TTL levels was another red herring to get uys away from seeing hiw ridiculously feeble you arguments agains supervisrs are?

If Vcc is out of spec, what is the MCU going to do with a RESET that's not at a valid Vcc level? How will it interpret the signals from other internal resources, flash, etc?
from a datasheet:

                                    min     max
VIH1 Input high voltage, XTAL1, RST 0.7VCC VCC+0.5 V

so, whatever Vcc is if reset is above 0.7Vcc the chip is reset.

from the DS89C430..450 datasheet, http://datasheets.maxim-ic.com/en/ds/DS8...89C450.pdf
page 2:

Reset Trip Point (Min Operating Voltage) (Notes 2, 3, 4)
min typ max
VRST 3.95 4.125 4.35 V
what does a uCs reset output have to do in a supervisor discussion? another red herring to get uys away from seeing hiw ridiculously feeble you arguments agains supervisrs are?

Why would I do that?
then WHY THE HECK do you keep 'suggesting' thet othere try this, verify that, make a test rig for those ....

Erik