[SI-LIST] Re: Termination of un-used clocks

If you terminate them you will have more current flowing in the part's
supply pins causing more power dissipation, more Ldi/dt voltage drops in
both the ground and power supply leads and more noise generated in the clock
lines themselves, the power supply and as potential EMI sources.

I cannot think of any argument in favor of terminating them.

Tom Dagostino
Teraspeed Consulting Group LLC     Teraspeed Consulting Group LLC
2926 SE Yamhill St.                Device Modeling Division
Portland, OR 97214                 13610 SW Harness Lane
                                   Beaverton, OR 97008
http://www.teraspeed.com           503-430-1065
tom@xxxxxxxxxxxxx


-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Kuriakose, Anand
Sent: Monday, February 24, 2003 9:02 PM
To: 'si-list@xxxxxxxxxxxxx'
Subject: [SI-LIST] Termination of un-used clocks



Hi,

Whats the better way of dealing with un-used high speed ( 66Mhz to about
133Mhz) clocks? Should they be terminated near the source to ground or to be
left unconnected.

I happen to check out a similar discussion in the si-list archive, but
coudnt come to any conclusion.

Regrds,
Anand.
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