TDA4VM: WKUP_LFOSC0_XI unused connection

Xingyu Zhu

Part Number: TDA4VM

Dear expert,

In below table WKUP_LFOSC0_XI should be pull down if unused, but in another picture, WKUP_LFOSC0_XI is left float. May I know which is correct? Thanks.

Best Regards,

Xingyu Zhu

over 2 years ago

0 Robert Eschler over 2 years ago

TI__Guru 53055 points

The unused WKUP_LFOSC0_XI input should be pulled to GND.

0 Xingyu Zhu over 2 years ago in reply to Robert Eschler

TI__Expert 4335 points

Hi Robert,

In datasheet, it says XI has internal pull-down. Do we still need external pull-down?

0 Robert Eschler over 2 years ago in reply to Xingyu Zhu

TI__Guru 53055 points

I will need to do some research on that specification (internal resistor). I recommend using external resistor to pull-down the XI pin if interface is unused.

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TDA4VM: WKUP_LFOSC0_XI unused connection