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SN74LV14A: Input impedance @Vcc=5.0V

Hirotaka Matsumoto
Guru 27585 points
Part Number: SN74LV14A

Hi all

Would you mind if we ask SN74LV14A?

How much is input impedance in case of Vcc=5.0V?　5V(VCC)/12mA(IOH)?

Kind regards,

Hirotaka Matsumoto

  • 0
    TI__Guru* 96862 points

    Hello Matsumoto-san,

    I am a little confused -- you want to know how the input impedance changes based on the output current?

    This is a CMOS logic gate -- the input impedance will always be very large, based on the leakage current at the input given in the datasheet:

    Input capacitance (typical, to ground):  2.3 pF, given in datasheet at Ci

    Input resistance (minimum, to ground): 5.5 MΩ, calculated from datasheet value Ii and the supply voltage

    Neither of these values is related to the output current.