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National Semiconductor's Analog Crosspoint Switch Allows Designers to Drive Extended Backplanes and Cables with Reduced Jitter and Improved Testability

SCAN90CP02 is the World's First 1.5 Gbps 2x2 LVDS Crosspoint Switch with Programmable Pre-Emphasis and IEEE 1149.6 Testability

Feb 2, 2004

February 2, 2004 - National Semiconductor Corporation (NYSE:NSM) extended its lead in LVDS (low voltage differential signaling) technology by introducing the world's first 1.5 Gbps 2x2 LVDS analog crosspoint switch with programmable pre-emphasis and IEEE 1149.6 testability.  The SCAN90CP02's pre-emphasis feature boosts the signal for improved data integrity across lossy backplanes and cables, while the IEEE 1149.6 circuitry supports a new standard to test these backplanes and cables. 

National's SCAN90CP02 is a two-input, two-output LVDS non-blocking crosspoint switch that operates at speeds up to 1.5 Gbps.  It is capable of many different configurations, including a conventional crosspoint switch, a buffer/repeater, a 1:2 splitter, and a 2:1 multiplexer.  Crosspoint switches are commonly used as a splitter or mux function in networking and communications infrastructure equipment to provide redundancy for data and clock signals. 

"While other LVDS buffers and switches only minimize the jitter they add to the system, the SCAN90CP02 can actually remove jitter, increasing system reliability and allowing the use of a less expensive interconnect," said Dave Lewis, marketing manager for National Semiconductor's Networking Division. "With pre-emphasis, the SCAN90CP02 can be used not only for normal switching but also as a buffer to boost existing FPGA, ASIC and SerDes LVDS signals."

IEEE1149.6 is a recently approved specification for evaluating previously untestable AC-coupled interconnects.  Support for 1149.6 is important because many high-speed LVDS connections now use AC-coupling (capacitive coupling) to eliminate signal offsets between drivers and receivers that reside at remote locations.

"We believe the new 1149.6 standard resolves a major gap in our built-in-test capability," said Bill Eklow, chairman of the IEEE 1149.6 working group. "We're pleased that National recognizes this and is providing early support with their new SCAN90CP02 device."

The SCAN90CP02 testability features include IEEE 1149.1 (JTAG), IEEE 1149.6, and a supplementary IEEE 1149.1-initiated fault insertion capability to verify system level fail-over and redundancy modes. These features lower test time, and reduce test and development costs.

More on the SCAN90CP02 and Other National LVDS Products
The SCAN90CP02 will be featured in National's booth (number 126) at the DesignCon tradeshow at the Santa Clara Convention Center in Santa Clara, California, from February 2-5, 2004.  For more information on these technologies and to view our product portfolio, refer to http://www.national.com/lvds
or http://www.national.com/scan.

Pricing and Availability
The SCAN90CP02 is available now in 5 x 5 mm LLP-28 packaging and is priced at $4.95 in 1,000-unit quantities.  More information on National's SCAN90CP02 is available at http://www.national.com/pf/SC/SCAN90CP02.html
.  A high resolution, downloadable photo is available at http://www.national.com/company/pressroom/gallery/es.html

About National Semiconductor
National Semiconductor, the industry's premier analog company, creates high performance analog devices and subsystems. National's leading-edge products include power management circuits, display drivers, audio and operational amplifiers, imaging sensors and data conversion solutions. National's key markets include wireless handsets, displays, PCs, networks and a broad range of portable applications. With headquarters in Santa Clara, California, National reported sales of $1.67 billion for fiscal 2003, which ended May 25, 2003. Additional company and product information is available at www.national.com