• Resolved

ISO7840: Absolute Maximum Ratings about "Input voltage"

Part Number: ISO7840

Hi all

Would you mind if we ask ISO7840?

Input voltage of Absolute Maximum Ratings is VCCX + 0.5V.
If voltage applies to INX without VCC1 supply(no power supply), it exeeds Absolute Maximum Ratings.

Does it means there is internal protection diode?
We recognize this value(15mA) is the maximum continuous current for steering-diode(protection diode).
So, if we set the input resistance 1K~5kohm at INX to limit the current for steering-diode, when voltage applies to INX without VCC1 supply(no power supply),
INX is not damaged by the input voltage, right?

Kind regards,

Hirotaka Matsumoto