The customer is asking about the pin7 to GND impedance of LM393ADGKR when there is no voltage on Vcc. Could you please kindly check on this? Thank you.
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The output should be very high impedance, 10's of meghoms, like a reversed biased diode.
The output is the collector of a BJT transistor. With no current through on the base, the transistor will be "off".
We do not characterize this or specify this as Vcc=0V is not a valid operating condition.
This is also assuming that all other pins are at 0V. Voltages on other pins may cause internal leakages that could affect the actual value.