[SI-LIST] Re: Length Matching for Interlaken and CFP Trace
- From: Jory McKinley <jory_mckinley@xxxxxxxxx>
- To: "jory_mckinley@xxxxxxxxx" <jory_mckinley@xxxxxxxxx>, "signal.integrity2@xxxxxxxxx" <signal.integrity2@xxxxxxxxx>, "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Tue, 31 Jul 2012 08:50:06 -0700 (PDT)
Lets try that table again!
LanesSkew(ps)
0, 3, 4, 710
1, 2, 5, 62.5
8, 9 , 118.0
10, 12, 13, 14, 157.5
________________________________
From: Jory McKinley <jory_mckinley@xxxxxxxxx>
To: "signal.integrity2@xxxxxxxxx" <signal.integrity2@xxxxxxxxx>;
"si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
Sent: Tuesday, July 31, 2012 11:41 AM
Subject: [SI-LIST] Re: Length Matching for Interlaken and CFP Trace
Hello Dan,
Interlaken:
Electrical skew between P/N differential pairs should be under 3ps this
includes the connector regardless of TX or RX. Also Interlaken Interoperability
Recommendations Rev 1.6 has a lane to lane skew maximum as:
LanesSkew(ps)
0, 3, 4, 710
1, 2, 5, 62.5
8, 9 , 118.0
10, 12, 13, 14, 157.5
These hold for all TX and RX but not between them. I think there is an overall
channel spec out there that covers TX and RX maximum skew of 107UI but 67UI of
this is for the Chip and 40UI for board.
Physical matching is a good start but you will have to simulate the channel
through the connector and most probable have to back drill the connectors at
least 0, 3, 4 and 7.
-Jory
________________________________
From: Dan <signal.integrity2@xxxxxxxxx>
To: si-list@xxxxxxxxxxxxx
Sent: Monday, July 30, 2012 2:53 PM
Subject: [SI-LIST] Length Matching for Interlaken and CFP Trace
HI All,
we are designing board with Interlaken and CFP signals for operating 10Gig
signals. can any one tell me how the lanes should be length matched.
interlaken: is it length matching within connector? that is all Tx are
length matched and all Rx are legngth matched and NOT between Tx and Rx.
CFP: Same as above. Tx and Rx are length matched whithin the group and not
between them?
Thanks Dan.
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