SN74LVC2GU04: input pin impedance

Alberto Doronzo

Expert 4610 points

Part Number: SN74LVC2GU04

Hi,

I am looking for the logic input pin impedance. The capacitance is given on the spec sheet but there is no resistance.

Is there a resistance to ground? 1Mohm?

Thank you!

-Alberto

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 275790 points

The datasheet specifies the worst-case leakage current (I_I) as 5 µA. At 5 V, that would be 1 MΩ.

Please note that such a current happens only at the most extreme temperatures. Under normal conditions, the input impedance is many orders of magniture higher.

0 ShreyasRao over 4 years ago

TI__Guru 58020 points

Thank you, Clemens for your valuable inputs as always !

Alberto,

Hope you are doing great.

All the CMOS input pins have very high input impedance as explained by Clemens. It is generally derived from the input leakage current spec listed in the datasheet.

please let know if there is anything else.

0 Alberto Doronzo over 4 years ago in reply to Clemens Ladisch

TI__Expert 4610 points

Thank you both Clemens and Shreyas, I imagined that was the answer but always good to verify!

Thanks again!

-Alberto

Logic

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SN74LVC2GU04: input pin impedance