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National Semiconductor Boosts FPGA Signal Integrity

World's First Four-Channel LVDS Buffers with Pre-emphasis Extend Signal Reach Across Backplanes and Cables

Aug 9, 2005

August 9, 2005 - National Semiconductor Corporation (NYSE:NSM) today introduced two new low-power, high-performance buffer/repeaters for its industry-leading portfolio of LVDS (low-voltage differential signaling) products.

National’s DS90LV004 and SCAN90004 1.5 Gbps, four-channel buffers are the first to include configurable output pre-emphasis, hot-plug protection and 15 kV of electro-static discharge (ESD) protection.  The devices boost the signal integrity of field-programmable gate arrays (FPGAs) and application specific integrated circuits (ASIC) across backplanes and cables in telecom, datacom, industrial, medical, automotive and office imaging applications.  For designers who want to implement system-level test, the SCAN90004 features IEEE 1149.6 (JTAG) testability. 

"The DS90LV004 and SCAN90004 dramatically improve the performance of a wide variety of designs driving high-speed signals," said Jeff Waters, product line director for the Interface division at National.  “In FPGA- and ASIC-based designs, for example, these buffers can provide ESD protection up to 15 kV and deliver higher-speed and longer-reach signals over lower-cost cables and backplanes.”

Technical Features of the DS90LV004 and SCAN90004 LVDS Buffer/Repeaters
The four-channel DS90LV004 drives up to four LVDS clock and/or data channels over common backplanes or simple cable configurations.  The wide differential input range easily interfaces to LVDS, low voltage positive emitter-coupled logic (LVPECL) or current mode logic (CML) input levels and the output levels are fully LVDS compliant.  The DS90LV004 operates at data rates up to 1.5 Gbps and includes configurable output pre-emphasis that allows the designer to “overdrive” the outputs to compensate for a lossy interconnect.  The DS90LV004 also features the industry’s highest 15 kV of ESD protection for maximum isolation of expensive FPGAs, ASICs and other onboard components.  In power-sensitive applications, the power-down mode is useful in minimizing power consumption when all four channels of a single device are not active, as in redundancy applications.

The SCAN90004 has the same features as the DS90LV004, and also includes IEEE standard 1149.1 and 1149.6 (JTAG) testability to verify high-speed differential connections in the system.  These JTAG-accessible features extend the capability of an existing system or board-level JTAG bus to high-speed mixed-signal environments.

For more information on the DS90LV004 and SCAN90004 or to order samples and an evaluation board, visit http://www.national.com/pf/DS/DS90LV004.html and http://www.national.com/pf/SC/SCAN90004.html.  For more information on National’s interface products, visit http://lvds.national.com.  An on-demand online seminar, “Boosting FPGA and CPLD Interface Performance for Off-board Data Transmission” is available for viewing at http://www.national.com/onlineseminar/.

About National’s Interface Products
National Semiconductor, the LVDS technology innovator and market leader, offers a wide range of interconnect solutions that transfer high-speed digital signals using world-class analog technology.  These solutions help system designers develop high-performance applications in a variety of markets, including communication and industrial systems.  The products feature high reliability, low power and low noise, and dramatic systems savings in cable and connector costs.  National Semiconductor is the world’s largest supplier of high-speed LVDS products, according to Databean’s 2005 Analog IC Market Share survey.

Pricing and Availability
The DS90LV004 and SCAN90004 are available now in a 48-pin TQFP.  In 1,000-unit quantities, the DS90LV004 is priced at $4.95 and the SCAN90004 with JTAG is priced at $5.20.  An evaluation board and lead-free package options are also available.

Note to Editors:  To view a high-resolution downloadable photo of this product, visit National's photo gallery at http://www.national.com/company/pressroom/gallery/network.html.

About National Semiconductor
National Semiconductor, the industry's premier analog company, creates high-value analog devices and subsystems.  National's leading-edge products include power management circuits, display drivers, audio and operational amplifiers, communication interface products and data conversion solutions. National's key analog markets include wireless handsets, displays and a variety of broad electronics markets, including medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, California, National reported sales of $1.91 billion for fiscal 2005, which ended May 29, 2005.  Additional company and product information is available at www.national.com