[SI-LIST] 1394 differential traces
- From: "Maheshwari.P" <maheshwari@xxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Mon, 15 Sep 2003 11:02:57 +0530
Hello,
I have used TSB41AB1 single port 1394-2000a transceiver to implement my 1394
PHY. As the PHY needs to be close to Link controller, PHY chip is placed to
link controller and hence the length of differential traces TPA and TPB came
to 3.7-3.8 inches. The differential trace impedance is controlled by
calculating trace width and clearance for the stackup and the board is not
declared as impedance controlled board to fab house.
Is it advicable to GND guard both the differential traces together like GND
;TPA and TPB; GND? Will it affect the impedance of the traces?
Due to the mechanical of the connector, the traces cannot be routed
differentially below the connector. Hence there is a 100mils difference
between TPA- and TPA+. This is the same case for TPB+ and TPB-. Is it
required to do length matching to so that TPA- and TPA+ have the same
length?
Thanks in advance.
Regards,
Maheshwari
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
