SN75LVCP601: ac-coupling capacitors on SATA high speed signals

feiy wang

Part Number: SN75LVCP601

we want use SN75LVCP601 for our new design, I have question regarding the ac-coupling capacitors on SATA high speed signals, do we actually need them? we don't need hot-plug capable.

over 7 years ago

0 Lee Sledjeski over 7 years ago

TI__Mastermind 43795 points

Hi Feiy,

Yes the capacitors are needed. The value for SATA applications is 10nF.

Regards,
Lee

0 feiy wang over 7 years ago in reply to Lee Sledjeski

Prodigy 30 points

Hi Lee,

The datasheet says this device is hot-plug capable (requires the use of
ac-coupling capacitors at differential inputs and
outputs), thus preventing device damage under
device hot-insertion, in such cases as: async signal
plug or removal, unpowered plug or removal,
powered plug or removal, surprise plug or removal.

If we always plug the device, in this case, do we still need cap?

0 Nasser Mohammadi over 7 years ago in reply to feiy wang

TI__Guru* 93670 points

Hi Feyi,

AC coupling capacitors isolate power sequencing between two attached device thus preventing damage to high speed lanes. Therefor it is advised to use AC coupling capacitors.

Regards,,nasser

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SN75LVCP601: ac-coupling capacitors on SATA high speed signals