UCC5871-Q1: How to connect pin ASC_EN & ASC if not used?

Sherry Liang

Part Number: UCC5871-Q1

Dear team,

If these two pins ASC_EN & ASC are not used, they should be connected to GND with pulldown resistors in my understanding, right? What is the recommendation for the pulldown resistor? Is it ok to use 1kohm?

Thanks & Best Regards,

Sherry

over 2 years ago

0 Alexander Mazany over 2 years ago

TI__Genius 11770 points

Hello Sherry,

Our expert on this device is out of office today. he should be able to reply tomorrow.

Thanks,

Alex M.

0 Daniel Norwood over 2 years ago

TI__Expert 5921 points

ASC_EN and ASC should be well connected to ground if they are not in use.

Even if they are used we still recommend a pulldown resistor to ensure the logic state is low if the MCU outputs are highZ.

If the ASC and ASC_EN inputs are completely unused I recommend using a smaller resistor, even a 0 Ohm resistor, to directly tie the ASC and ASC_EN inputs to GND. THe prevents any possible noise coupling on the pins.

Regards,

Daniel

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UCC5871-Q1: How to connect pin ASC_EN & ASC if not used?