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For variable delay time (flexible delay time setting) type reset ICs, the formula for calculating the rise delay time (tPLH) is listed as tPLH=-CCT×RCT×ln((VDD-VCTH)/VDD), but is the substitution value of VDD in the formula the steady state supply voltage or the release voltage?
Calculate VDD in the formula using the value of VDD in steady state. Since VDD=VDET×1.1 is listed in the conditions for the parameter VCTH, there is no direct relation to the formula for finding the reset rise delay time (tPLH).