TUSB4041I: Does Pin 17 (TEST signal) need to be pulled down externally ?

Allen Fernandez

Part Number: TUSB4041I

Tool/software:

Pin 17 (TEST) is reserved for factory test. I have this pin N/C on my design, but I see there is a 4.7K pull-down on this pin in Fig.32 of the datasheet. Do I need this 4.7K pull-down or can I leave this pin N/C ?

2 months ago

0 Brian Zhou 2 months ago

TI__Guru*** 145480 points

yes, TEST pin needs to be connect to gnd by 4.7 resistor.

Best

brian

0 Allen Fernandez 2 months ago in reply to Brian Zhou

Prodigy 60 points

Doesn't this pin already have an internal pull-down ? What kind of defect/degradation can I expect to see without an external 4.7K pulldown ?

0 Brian Zhou 2 months ago in reply to Allen Fernandez

TI__Guru*** 145480 points

Hi Allen:

One customer has issue before with TEST pin floating, then we recommend every customer to PD TEST pin since then.

Best

Brian

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TUSB4041I: Does Pin 17 (TEST signal) need to be pulled down externally ?