Question : RC4580 : Does current path exist between input terminal and VCC?

Hello.

This is an additional explanation.

This question assumes the following situations.
VCC+=0V,VCC-=0V,IN- or IN+ is voltage inflict.
Is there a some　problem?

Regards,
Toshiya

Hello Toshiya-san,

With both supplies at 0V, the input pins will bock current flow when positive voltage is applied.

Although outside the scope of the question, negative voltage on the input pins will cause current flow to VCC-.

Regards,
Ron M.

Hello Ron-san,

Thanks for your explanation.

Regards,
Toshiya

Hello Ron-san,

Sorry,I have two additional questions about RC4580.

1.If negative voltage is applied at input pins when both supplies at 0V.
  If approximately input voltage < -0.6V, a current flows through the parasitic diode.
  I think that,if forward current is less than 20mA,it is no problem in ability.

  Am I correct?

2.If positive voltage is applied at input pins when both supplies at 0V.
  What is value of input voltage range?
  I think that,if input voltage is less than +15V,it is no problem in ability.
  (I referred to the absolute maximum rating "Input voltage".)

Could you please correct me if I'm wrong.

Regards,
Toshiya

Hello Ron-san,

Thanks for your quick response and detailed explanation.

Regards,
Toshiya