DS25BR440: unused channel termination

Toshihiro Watanabe

Genius 10235 points

Part Number: DS25BR440

Hello,

We have one unused channel. I looked at below post. Input pin can be floating and LOSn tied to PWDNn.

I think PWDNn is ties low and LOSn is week pull up to VDD is also no issue. Is my understanding correct?

Best regards,

Toshihiro Watanabe

0 Brian Zhou over 6 years ago

assign to Lee

0 Lee Sledjeski over 6 years ago

Hi,

Yes, connecting LOSn to PWDNn will shut off the channel when no signal is detected.

Regards,

Lee

0 Toshihiro Watanabe over 6 years ago in reply to Lee Sledjeski

Hello Lee-san,

Thank you for your answer. I think PWDNn tighes low and LOSn is weak pull up is also no issue for unused channel . Is my understanding correct?

Best regards,

Toshihiro Watanabe

0 Lee Sledjeski over 6 years ago in reply to Toshihiro Watanabe

It is good to tie the PWDNn low. This puts the channel into a low power mode

LOSn is an output, so it is okay to leave this floating or provide a weak pull-up to see the output level reported correctly.

Regards,

Lee

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