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TPD12S521 CEC OUT Leakage Current

Figure2 on the datasheet shows the reference curcuit of this device.

Our customer observed over 1.8uA Leakage current , when 5V_SUPPLY is OFF referring

the circuit. This leakage looks to flow from pull-up  to inside of chip(maybe 5V_SUPPLY line).

1. Is there a possibility to occur this kind of over leakage current?

2. If there was a possibility, How is the improment method against over leakage.

 

Best Regards,