This is the datasheet of the MUX (74LVC1G157) I am working with. While I was doing the power calculation, came to the following parameter, ΔICC.
1) What is this additional supply current stands for?
2) What is the significance of this value?
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1\$\begingroup\$ The triangle symbol means 'delta' or 'the change in'. So yours means 'the change in Icc' under certain conditions. (The answers below explain the conditions.) It's not a separate current to Icc, its describing a behaviour of Icc. \$\endgroup\$– TonyMCommented Mar 8, 2018 at 7:18
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\$\begingroup\$ As it says : additional supply current per pin. Vi=Vcc-0.6 suggests this applies to each input pin held high but not actually at VCC. There will be some explanatory note in the text. \$\endgroup\$– user16324Commented Mar 8, 2018 at 11:53
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To avoid the "additional supply current" Vin must be 0V or Vcc.
Note that ΔIcc is spec'd as Vcc-0.6V.
This implies the beginning towards Vgs(th) output crossover conduction currents which with thermal drift in threshold cause the nominal additional current to reach 500uA max.
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\$\begingroup\$ Stewart, So for the net current calculation, following is the understanding. Total current,I = Switching current + Supply current + Output load current \$\endgroup\$– vt673Commented Mar 8, 2018 at 8:45
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\$\begingroup\$ Yes but NO this is an addon to supply current if the input voltage is offset from either rail. They spec'd the input at Vol typical outputs that might a pull up load. It is an unusual spec. The supply current will be even more if the input is Vdd/2 \$\endgroup\$– D.A.S.Commented Mar 8, 2018 at 15:05