Cadence Accelerates Signal Integrity Closure with New Celtic 4.0 Solution For Nanometer IC Design

8/13/2002 - Cadence Design Systems introduced Cadence® CeltIC(TM) 4.0 for nanometer-scale integrated circuit (IC) design. This new release of the CeltIC signal integrity solution, the recommended crosstalk analysis tool in the TSMC 130-nanometer reference design flow, includes major enhancements critical to successful nanometer design. CeltIC 4.0 features greater capacity of more than five million gates flat, to handle the increased scale of nanometer designs. It also demonstrates better performance with its Linux port, and provides even greater accuracy with its ability to model nonlinear slew degradation effects.

Signal integrity problems are a first-order effect in nanometer designs, where tall, thin wires create unintended electrical effects that impact design timing and functionality. CeltIC 4.0 signal integrity analysis enables customers to identify these signal integrity problems before their designs are committed to silicon and to avoid costly and time-consuming re-spins.

Tightened integration of CeltIC 4.0 with Cadence SoC EncounterTM and Cadence Silicon Ensemble® PKS (SE-PKS) provides integrated crosstalk minimization, analysis, and repair throughout customers' IC design flows. CeltIC 4.0 includes support for 32-bit Linux and IBM AIX operating systems, and for 64-bit workstations from Sun Microsystems and Hewlett Packard.

Cadence customers AMD, Agere Systems, and Metalink Ltd. have achieved accelerated signal integrity closure and faster time-to-market with CeltIC. According to John J. Szetela, manager, CAD engineering and systems for AMD's Personal Connectivity Solutions Group, "AMD has used CeltIC for crosstalk sign-off on four tape-outs, including our most recent 130-nanometer networking design. We are impressed with CeltIC's filtering of false errors, which lets us focus on the few real noise failures, thereby achieving quicker signal integrity closure on our IC designs. We beta-tested CeltIC 4.0's Linux port, and it demonstrated a 3X speedup over previous versions. This acceleration should help us get our multimillion-gate designs to market faster."

"Agere Systems validates its IC and ASIC designs before tape-out to ensure they are noise immune," said Kishore Singhal, manager for signal integrity and interconnect analysis with Agere Systems. "The company has successfully used CeltIC to check and repair crosstalk violations for a number of designs, including our larger, more highly integrated ASIC system solutions. Agere's ASIC business has benefited in particular from the improved accuracy of CeltIC 4.0 in analyzing electrical noise and other problems. Maintaining signal integrity enables us to meet two of our ASIC customers' primary needs: increased high-speed interface channels and reduced time-to-market."

"To eliminate costly mask changes and silicon re-spins, it is imperative that our leading-edge DSL chip sets be free from noise problems," said Yuval Itkin, director of the VLSI group with Metalink Ltd. "Using CeltIC allowed us to successfully detect an elusive crosstalk-induced problem in time on our 0.18-micron design. We have incorporated CeltIC into our design flow for crosstalk sign-off of all future designs."

CeltIC 4.0 creates crosstalk repair files that drive the in-place-optimization (IPO) engines of SoC Encounter and SE-PKS to implement the fixes. Fixes include re-sizing victim drivers, inserting buffers, spacing aggressors away from victims, and shielding failing nets. CeltIC 4.0 provides greatly increased capacity and has been used on nanometer-scale designs of more than five million gates flat on standard 32-bit workstations. In addition, CeltIC 4.0 delivers improved accuracy, including modeling the nonlinear slew degradation on victim nets that affects the rise-and-fall delays of the receiver cells. Also new is support for the more accurate BSIM4 and MOS9 device models.

"With this new release of the CeltIC signal integrity solution, Cadence customers will benefit from improved chip yields and performance by addressing signal integrity at all stages of the design flow including virtual prototyping, block implementation, and final sign-off," said Eric Filseth, vice president of SP&R marketing at Cadence. "The integrated Cadence solution enables our customers to rapidly achieve signal integrity closure as they progress from RTL to GDSII."

About Cadence (
Cadence is the largest supplier of electronic design technologies, methodology services, and design services. Cadence solutions are used to accelerate and manage the design of semiconductors, computer systems, networking and telecommunications equipment, consumer electronics, and a variety of other electronics-based products. IEEE, the world's largest technical professional society, honored Cadence with its 2002 Corporate Innovation Recognition award. With approximately 5,500 employees and 2001 revenues of approximately $1.4 billion, Cadence has sales offices, design centers, and research facilities around the world. The company is headquartered in San Jose, Calif., and traded on the New York Stock Exchange under the symbol CDN.

Cadence, Silicon Ensemble, and the Cadence logo are registered trademarks. CeltIC and SoC Encounter are trademarks of Cadence Design Systems, Inc.

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