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National Semiconductor’s New LVDS, Dual Multiplexer-Buffers Feature Industry’s Lowest Jitter

Trio of Devices Integrates High-Performance Multiplexer and Buffer Functions in a Single LLP Package to Minimize Footprint and Improve Signal Integrity

May 15, 2006

May 15, 2006 – National Semiconductor Corporation (NYSE: NSM), a leading supplier of high-speed interface devices, today introduced three dual multiplexer- buffers (mux-buffers) with 18-picoseconds of jitter performance, the best signal integrity in the industry for low-voltage differential signaling (LVDS) interfaces.  The DS15MB200, SCAN15MB200 and DS08MB200 extend the reach of LVDS signals across cables and backplanes in point-to-point applications.

The dual mux-buffer configuration manages redundant differential data streams at speeds up to 1.5 Gigabits per second (Gbps).  Each half of the device provides a 1:2 buffer and a 2:1 multiplexer for duplicating one signal into two output streams or selecting from two alternate input data sources. This architecture is a common building block for redundancy in serial backplanes and system interconnect applications. 

The new products’ LVDS capability makes them well-suited for conditioning signals from low-cost field-programmable gate arrays (FPGAs) and application-specific integrated circuits (ASICs), which typically do not have high-performance output drivers.  Their signal integrity features drive both data and clock signals over longer distances, enabling the use of lower-cost cables and connectors. The small LLP® package allows the devices to be placed closer to the ASIC or FPGA connector for optimum signal integrity.

In a related announcement last week, National released details of its current-mode logic (CML) signal-conditioning buffers and multiplexers with industry-leading 25-picoseconds of jitter. With these new LVDS products, National creates a complete CML and LVDS family, allowing system designers to select the optimal interface technology and throughput, up to 4.2 Gbps, for all their redundancy needs.

Key Technical Features of the DS15MB200, SCAN15MB200 and DS08MB200
The outputs of the DS15MB200 and SCAN15MB200 have configurable pre-emphasis with a separate control for each output.  Pre-emphasis conditions the signal by boosting the higher frequency components of the signal to compensate for lossy (inexpensive) backplanes or cables. In addition, the SCAN15MB200 supports IEEE 1149.1 (JTAG) and 1149.6 test features to verify connections and test the high-speed data paths.  The DS08MB200 manages data rates up to 800 Mbps and does not include pre-emphasis or 1149.1 support.

All three dual mux-buffers include an integrated source and receiver 100-Ohm termination that greatly improves signal integrity by terminating the backplane or cable as close to the input/output as possible. This reduces the external component count and board space.  The 48-pin LLP package and internal termination resistors allow the mux-buffers to offer the best combination of performance and size for redundant LVDS signaling environments.

For more information on the DS15MB200, SCAN15MB200 and DS08MB200, to order samples and an evaluation board, or to download an application note, visit http://www.national.com/pf/DS/DS15MB200.html, http://www.national.com/pf/SC/SCAN15MB200.html and http://www.national.com/pf/DS/DS08MB200.html.

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/2005/interface/interface.html.

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, as well as 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.  For more information on National’s interface products, visit http://www.national.com/appinfo/interface/

Pricing and Availability
Available now, the DS15MB200 is priced at $5.95, the SCAN15MB200 is $6.25 and the DS08MB200 is $4.25, all in 1,000-unit quantities.

Note to editors:  To view a high-resolution downloadable photo of these products, 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 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