LMK00301: how to connect the unused outputs

BX27

Genius 3900 points

Part Number: LMK00301

Tool/software:

hi,

we use LMK00301 for 8 buffer outputs. two left unused. LVDS output.

can we just floating the unused output pins without any PCB trace? or can we just connect 100ohm termination resistor？

how to understand the following information in datasheet “left floating with minimum copper length ??”? Thanks!

6 months ago

+1 vicente flores prado 6 months ago

TI__Mastermind 29172 points

Hello BX27,

Leave unused outputs floating.

Best regards,

Vicente

+1 BX27 6 months ago in reply to vicente flores prado

Genius 3900 points

hi Vincente

will floating unused outputs cause EMC issue? this is our major concern. thanks!

+1 vicente flores prado 6 months ago in reply to BX27

TI__Mastermind 29172 points

Heloo BX27,
Still leave floating.
If you terminate with 100Ohm you will now have current flowing between P/N and switching noise will be a cause for concern.

Best regards,

Vicente

+1 BX27 6 months ago in reply to vicente flores prado

Genius 3900 points

Hi Vincente，

ok we will floating them. could you pls help explain how to understand the information in datasheet “left floating with minimum copper length ”? , do not quite understand. Thanks!

+1 vicente flores prado 6 months ago in reply to BX27

TI__Mastermind 29172 points

Hi BX27,

Just leave them floating.

Clock & timing

Clock & timing forum

LMK00301: how to connect the unused outputs