[SI-LIST] Re: IBIS Model error
- From: Ed Sayre III <esayre3@xxxxxxxx>
- To: sureshk@xxxxxxxxxxxxxx
- Date: Mon, 17 Nov 2003 09:36:44 -0500
Suresh,
You should talk to IDT, or whomever created the model. I have found
that IBIS models routinely come with errors, and when pointed out, the
vendors repair them for you.
Good luck.
At 02:37 PM 11/17/2003 +0500, Suresh.K wrote:
>Hi Gurus,
>
>Warm Wishes to all ......
>
>I'm a beginner for SI Analysis and I need some clarification
>about the Error of IBIS Model(71V2546-SRAM),which I'm getting when I
>Import it into the Zuken's Hotstage tool Constraint Manager-Simulation
>Library.
>
>Actully I'm using the model ,which I downloaded from IDT website.
>
>Please look into the error message below and give your precious
>suggestions,
>
>ERROR- Model IOPAD2546Z: The [Rising Waveform]
>with [R_fixture]=50 Ohms and [V_fixture]=1.5V
>has TYP column DC endpoints of 0.50V and 2.21v, but
>an equivalent load applied to the model's I-V tables yields
>different voltages ( 2.13V and 2.69V),
>a difference of 288.80% and 84.70%, respectively.
>ERROR- Model IOPAD2546Z: The [Falling Waveform]
>with [R_fixture]=50 Ohms and [V_fixture]=1.5V
>has TYP column DC endpoints of 0.50V and 2.21v, but
>an equivalent load applied to the model's I-V tables yields
>different voltages ( 2.13V and 2.69V),
>a difference of 288.98% and 84.70%, respectively.
>WARNING- Model 'IOPAD2546Z': TYP VI curves cannot drive through
>Vmeas=1.25V
> given load Rref=50 Ohms to Vref=1.5V
>ERROR- Model IOPAD2546Z: The [Rising Waveform]
>with [R_fixture]=50 Ohms and [V_fixture_min]=1.5V
>has MIN column DC endpoints of 0.53V and 2.11v, but
>an equivalent load applied to the model's I-V tables yields
>different voltages ( 2.04V and 2.54V),
>a difference of 304.74% and 86.47%, respectively.
>ERROR- Model IOPAD2546Z: The [Falling Waveform]
>with [R_fixture]=50 Ohms and [V_fixture_min]=1.5V
>has MIN column DC endpoints of 0.53V and 2.11v, but
>an equivalent load applied to the model's I-V tables yields
>different voltages ( 2.04V and 2.54V),
>a difference of 304.74% and 86.47%, respectively.
>WARNING- Model 'IOPAD2546Z': MIN VI curves cannot drive through
>Vmeas=1.25V
> given load Rref=50 Ohms to Vref=1.5V
>ERROR- Model IOPAD2546Z: The [Rising Waveform]
>with [R_fixture]=50 Ohms and [V_fixture_max]=1.5V
>has MAX column DC endpoints of 0.48V and 2.32v, but
>an equivalent load applied to the model's I-V tables yields
>different voltages ( 2.22V and 2.83V),
>a difference of 283.59% and 82.91%, respectively.
>ERROR- Model IOPAD2546Z: The [Falling Waveform]
>with [R_fixture]=50 Ohms and [V_fixture_max]=1.5V
>has MAX column DC endpoints of 0.48V and 2.32v, but
>an equivalent load applied to the model's I-V tables yields
>different voltages ( 2.22V and 2.83V),
>a difference of 283.59% and 82.74%, respectively.
>WARNING- Model 'IOPAD2546Z': MAX VI curves cannot drive through
>Vmeas=1.25V
> given load Rref=50 Ohms to Vref=1.5V
>Errors : 6
>Warnings: 6
>
>File Failed
>
>Thanks & Regards,
>Suresh.K,
>Vth EDA Lab,
>C-DOT,
>Bangalore-52.
>
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