[SI-LIST] Re: Package Model in IBIS
- From: Ray Anderson <ray.anderson@xxxxxxxxxx>
- To: Newbie Pugal <pugal8686@xxxxxxxx>
- Date: Mon, 27 Jun 2011 11:00:09 -0700
Pugal-
The RLC data provided in IBIS package models is usually extracted to include
all parasitic contributions from the die pad interface to the BGA/PCB interface.
This includes the wire contributions for wire bond packages and the die bump
contributions for flip-chip packages. The parasitic associated with the BGA
balls is also included.
-Ray Anderson
Raymond Anderson
Senior Signal Integrity Staff Engineer
Programmable Platforms Development
Silicon Technology Group
Signal Integrity and Package Development Department
Xilinx Inc.
2100 Logic Drive
San Jose, California 95124
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Newbie Pugal
Sent: Monday, June 27, 2011 10:38 AM
To: Russell Dill; Muranyi, Arpad
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Package Model in IBIS
Hi All,
Thanks for the replies.
As far as I understand the RLC values specifies in the package model provides
the wirebond or flipchip package parasitics right? or else it is a
characteristics of a pin?
Looks like a basic question but worth clearing the doubt.
Thanks
Pugal
________________________________
From: Russell Dill <Russ.Dill@xxxxxxx>
To: "Muranyi, Arpad" <Arpad_Muranyi@xxxxxxxxxx>
Cc: "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
Sent: Monday, 27 June 2011 10:26 PM
Subject: [SI-LIST] Re: Package Model in IBIS
If the package is sufficiently large, it would seem like the delay
could make a difference, especially if the impedance of the package
differs greatly from the impedance of the PCB trace.
On Mon, Jun 27, 2011 at 9:09 AM, Muranyi, Arpad
<Arpad_Muranyi@xxxxxxxxxx> wrote:
> That's because the rule is to give the length
> in the same unit as the RLC per unit length.
> If you multiply these two, the length drops out,
> so for the simulator it really doesn't matter.
> Arpad
> ==================================================
>
> -----Original Message-----
> From: Russell Dill [mailto:Russ.Dill@xxxxxxx]
> Sent: Monday, June 27, 2011 11:08 AM
> To: Muranyi, Arpad
> Cc: si-list@xxxxxxxxxxxxx
> Subject: Re: [SI-LIST] Re: Package Model in IBIS
>
>> The first two methods only support RLC data, there is no
>> length in this data. The RLC matrix is also without length.
>> The only syntax that can provide length is the multi-segment
>> uncoupled syntax, but even with this one, if length is 0,
>> the tool has to implement the RLC data as a lumped model.
>>
>> I hope this helps,
>
> BTW, I noticed that the IBIS specification specifies that "Lengths are
> given in terms of arbitrary 'units'." Any clue what the logic is to
> providing a length, but not actually giving it meaning? Is it just
> save the maker of an IBIS file from multiplying LRC per unit length by
> length?
> ------------------------------------------------------------------
> 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 technical documents are available at:
> http://www.si-list.net
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
------------------------------------------------------------------
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 technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
------------------------------------------------------------------
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 technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
This email and any attachments are intended for the sole use of the named
recipient(s) and contain(s) confidential information that may be proprietary,
privileged or copyrighted under applicable law. If you are not the intended
recipient, do not read, copy, or forward this email message or any attachments.
Delete this email message and any attachments immediately.
------------------------------------------------------------------
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 technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
