RE: [IBIS-Users] IBIS Question

Andy,

Try to take Arpad out your web. :-)

Just for your information, Cadence tool (PCB SI) does include RLC for
power/gnd pins in the network if their specified in the IBIS model.

 

Please be free to send a private email to me for specific Cadence tool
questions.

 

Best regards,

Lance Wang 
Cadence Design Systems, Inc. 
978-262-6685 

________________________________

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of Andy Joe
Sent: Wednesday, July 27, 2005 8:59 PM
To: Muranyi, Arpad; ibis-users@eda.org
Subject: RE: [IBIS-Users] IBIS Question

 

Thanks Arpad...

Can Mentor and Cadence tool vendors give comment about this if the tools
applied the package RLC value to the power and ground pins as well? If
not, may I know how the tools handle the effect caused by package
parasitic i.e. IR drop?

Thanks.

-Andy

"Muranyi, Arpad" <arpad.muranyi@intel.com> wrote:

	Andy,

	 

	The problem is that the IBIS spec doesn't spell out that

	the package parameters are also to be applied to power

	and GND pins.  In my opinion they should be used for those

	too, but it doesn't mean that all tool vendors do it.

	 

	Arpad

	===========================================================

	 

	
________________________________


	From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org]
On Behalf Of Andy Joe
	Sent: Wednesday, July 27, 2005 4:18 AM
	To: ibis-users@eda.org
	Subject: [IBIS-Users] IBIS Question

	Hi,

	 

	I have a question regarding the [Package] keyword in an IBIS
file. As far as I am concerned, the RLC values in this section applied
to all the I/O pins, my question is if these RLC values also applied to
power and ground pins as well? If they are not applied to power and
ground pins, how can we address the effects of different packages to the
power and ground pins in an IBIS model? (If R_pin, L_pin and C_pin for
every single pin are not available, only package min, typ and max RLC
are available)

	Thanks.

	 

	-Andy

	
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