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SN74HC138: Propagation delay estimate for 3.3V supply

Part Number: SN74HC138

Hi,

My customer wants to estimate what propagation delay might be most likely for 3.3V supply voltage.
Let's say the Tpd_Max values over temp range, for ABC to Y, EN to Y and IN to Y.

We can just assume that the Tpd curves are somewhat exponential when lowering the supply voltage, but ask for your opinion.

Many thanks for giving your expert assessment.

B.r M.A.M