SPICE / Electrical Models

High speed links need to be designed on time and on budget. And that's where Tyco Electronics Circuits and Design services can help. Our goal is to apply system-level expertise to design, simulate, and verify a system that meets your performance goals. We have completed hundreds of system designs and have years of experience in system layout, design and simulation. Our modeling skills and techniques are second to none with an extensive library of product models ready to go to work for your design.

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The Multi Line Model (MLM) represents several lines of the connector, and includes the contact components, contact to contact couplings, and where applicable, includes contact to shield couplings, and inter-pad couplings. This results in a detailed model that can be used for simulating crosstalk and ground bounce in addition to the parameters analyzed with the Single Line Model (SLM). Due to the contents of these models, Tyco Electronics requires the following agreement for use.

The SLM represents the effects of one line of a connector wired appropriately for high speed signal transmission (typically near-by contacts grounded). The model includes the lumped elements representing the series resistance, "effective" inductance and the total capacitance for one line. It also includes the impedance (Z ₀ ) and propagation delay (t _pd ) for the transmission line equivalent. This model can be used for simulating reflections, time delays and skew, attenuation and signal transmission quality.

An S-Parameter file contains a matrix of frequency based data. These models are extremely versatile and can be used in time-domain transforms to generate impedance, crosstalk, propagation delay and eye-patterns, or they can be used in frequency-domain simulations for throughput and crosstalk. All files are provided in Touchstone format, which is compatible with many simulation software packages.

The Allegro models are files containing stack-up independent information pertaining to the footprint of a connector. These files can be used during board design to aid in layout.

Unfortunately, we do not support IBIS models at this time. Our models are written in SPICE notation. To the best of our knowledge, our Multi-Line Models do not translate directly into IBIS. We encourage you contact your software vendor and/or the IBIS committee for insight into these translations.

In the past, our Single Line Models (SLMs) have been successfully converted into IBIS models. For help with IBIS models, go to the ANSI/EIA-656-A Homepage. There, you will find resources needed to assist you in converting our SLM's into IBIS models (i.e. IBIS model generation software that you can download for free).

Since we do not support IBIS models, we do not have the support needed to qualify your results from the conversion from SPICE to IBIS.

To learn more about Tyco Electronics models and connectors contact Circuits & Design Team.