DS100DF410: SFI to XFI

Gang Liu

Prodigy 130 points

Part Number: DS100DF410

Hello,

I have the similar question about XFI to SFI interconnect and I found this thread.

Is it true that I can directly connect XFI to SFI from chip to chip to make them link up?

e2e.ti.com/.../ds100df410-xfi-to-sfi-retimer

11 months ago

0 Lucas Wolter 11 months ago

TI__Mastermind 20300 points

Hi,

Yes that's correct, you can use DS100DF410 to interconnect XFI and SFI interfaces.

Best,

Lucas

0 Gang Liu 11 months ago in reply to Lucas Wolter

Prodigy 130 points

I see, DS100DF410 is a retimer to compensate PCB loss, not a protocol converter used to convert XFI to SFI.

If our PCB trace is short and PCB loss is very low, then SFI and XFI can interconnect directly. Is that true?

0 Lucas Wolter 11 months ago in reply to Gang Liu

TI__Mastermind 20300 points

Hi Gang,

Data can be passed directly between XFI and SFI interfaces without any decoding or reencoding. XFI and SFI have different min/max electrical limits for high-speed electrical parameters, which means they can't necessarily be interconnected directly even with low insertion loss, although it may be possible. A retimer can be useful to improve signal integrity to meet the specs of both interfaces.

I suggest taking a look at the 10G XFI and SFI specifications.

INF-8077i_10G_xfp_xfi_spec.pdf

sff-8431_10G_sfp+_sfi_spec.pdf

Best,

Lucas

Interface

Interface forum

DS100DF410: SFI to XFI