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ADM13305-4 WDI floating detection conditions

Product Number: ADM13305-4

Hi Guys,
thank you for your support.

Please let me know  the conditions which the WDI pin of the ADM13305-4 is as floating.
For example, voltage threshold or minimum impedance that can be connected.

The WDI pin is connected to a tri-state buffer, but the ADM13305-4 cannot disable the WDT function.

Best regurd,
Yuki.