FreeLists / si-list / [SI-LIST] differential signals spacing

[Goutham.S@xxxxxxxxxx]

Hi All,

In the differential trace routing (ethernet, scsi, USB etc.) , Routing
guidelines mentions that the differential pairs should be routed as close as
possible to
effectively utilise the differential signal properties (Noise Cancellation).
They don't mention the spacing in terms of mils or inches.

We were earlier giving the spacing as per the PCB designer's convenience. The
smallest spacing used is 5mils.
As far as Manufacturering technology is concerned, spacing can be 2.5 mil and
above.

My doubt is that from Electrical Engineers point of view, what is the spacing
requirement for differential signals.

Regards
Goutham Sabavat
Force computers India Pvt Ltd


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