HD3SS3220: HD3SS3220 DIR pin question

Hi Malik,

Thanks for reply!

But just curious the DIR is open-drain output, why still need to add pull up resistor even we don't use this pin?

Does it will affect the MUX control?

Thank you!

Best Regards,

Scott

Hi Scott,

Yes this pin does effect the internal mux control. This is why the pull is necessary for correct operation. 

Hi Malik,

In addition, do you have recommend resistor value as below? Since 500kohm is very rare in resistors.

As for the VBUS_DET pull up resistor,does it has concern that we use 909k 1% resistor?

Thank you!

Best Regards,

Scott

Hi Malik,

Here's few questions!

1.Does the bulk cap can use MLCC 

2.Can several capacitors be placed in parallel to achieve the required capacitance?

Thank you!

Scott

Hi Malik,

Thanks for reply. Just curious that why the single cap is recommended?

Thank you!

Scott