SN65DP159: OE pin voltage unstable

+ waveform and schematic

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Hi,

What is channel 1, 2, 3, and 4 in the scope waveform?

If you increase the solder paste coverage for the DP159 thermal pad, are you then seeing any improvement?

Thanks

David

Hi David,

Customer use 2 pcs DP159 so there're 2 OE and 3.3V(Ch1) 1.1V(Ch2) for power.

Ch1: V3P3_S ; Ch2: V1P1_S ; Ch3 : HDMI1_OE ; Ch4 : HDMI2_OE

They need time to check if increasing solder paste coverage help because they're hard to solder it back due to QFN package.

Besides, could we directly add a pull-up resister 47kohm to 3.3V at OE pin?

Thank you.

Best Regards,

Cindy

Cindy

There is an internal pullup resistor on the OE pin (150k to 250k), there is no need to add an external resistor.

Thanks

David

Hi David,

Because they see it could not pull-high strongly, if we pull-high again through outside resister, will there be any side-effect?

Thank you.

Thank you.

Best Regards,

Cindy