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National Semiconductor Introduces First 1 Gbps LVDS Chipset with True Embedded Clock Architecture

High-Speed SerDes Drives High-Quality Video Data Over 10 Meters of Cable

Nov 14, 2007

MUNICH, Germany and SANTA CLARA, Calif. - November 14, 2006 - National Semiconductor Corporation (NYSE:NSM), a leading supplier of high-performance analog signal-path products, today introduced a new high-speed LVDS serializer/deserializer (SerDes) chipset that serializes 24 bits of data over a single differential pair (2 wires) at a data rate of 1.03 Gbps.  In addition, the SerDes chipset features true embedded clock architecture and a unique random data lock feature. 

National’s new SerDes chipset will be demonstrated in National’s booth #506 in Hall A4, at the Electronica trade show in Munich, Germany, from November 14-17.

Unlike other SerDes chipsets that require the system designer to employ a second oscillator at the receiver, the DS90UR241 serializer and DS90UR124 deserializer chipset features true embedded clock architecture to receive data without burdening the system with a second oscillator.  This feature reduces system cost and simplifies system design by eliminating the need to match transmit and receive oscillator frequencies.

With the proliferation of flat panel displays into demanding new commercial, industrial and automotive applications, system architects need a robust, cost-effective method to drive high-bandwidth video data over long distances.  By achieving 1 Gbps of bandwidth over a single, low-cost differential pair, National’s new DS90UR241 and DS90UR124 chipset enables high-quality displays in a variety of applications, including automotive navigation and rear seat entertainment, point-of-sale (POS) terminals and industrial displays.

For demanding hot-plug applications, National’s SerDes chipset also includes a unique random data lock feature that enables quick recovery from datastream disruptions caused by spurious electrical impulses or momentary mechanical disconnects.  While other SerDes chipsets require a training session for the serializer and deserializer to achieve lock, National’s SerDes chipset locks quickly with any data pattern.

With additional features such as AC-coupling, at-speed BIST link diagnostics and programmable pre-emphasis to drive long cables, the DS90UR241 and DS90UR124 chipset is well-suited for demanding applications such as automotive navigation and infotainment systems.

About the DS90UR241 and DS90UR124 Chipset
The DS90UR241 and DS90UR124 chipset transmits and receives 24 bits of data over a single LVDS differential pair with embedded clock.  In addition to the low interconnect count, the chipset features AC-coupling support of the LVDS differential pair and a pre-emphasis function that boosts signal strength for driving long cable distances.  Proprietary data encoding enables a DC-balanced bit stream over the serial link.  Key features and benefits include:

  • Total throughput of 1.03 Gbps    
  • Frequency of 5 MHz to 43 MHz supports a wide variety of LCD panel resolutions    
  • 24-bit data payload    
  • True embedded clock: No external reference clock or oscillator required at the deserializer    
  • Robust random data lock    
  • At-speed BIST    
  • Programmable pre-emphasis for long cable drive    
  • AC-coupling support enables short-circuit protection of the serial link    
  • DC-balanced transmission to minimize jitter    
  • Low EMI emissions    
  • Voltage range of 3.0V to 3.6V    
  • Wide temperature support of -40 degrees C to 105 degrees C    
  • AEC-Q100 and ISO-10605 qualified

The DS90UR241 is offered in a 48-pin TQFP package and the DS90UR124 is offered in a 64-pin TQFP package.

For more information on the DS90UR241 and DS90UR124 or to order samples and an evaluation board, visit http://www.national.com/pf/DS/DS90UR241.html and http://www.national.com/pf/DS/DS90UR124.html.  For more information on National’s interface products, visit http://interface.national.com.

Pricing and Availability
The DS90UR241 and DS90UR124 chipset is available now.  The DS90UR241 is priced at $6.60 and the DS90UR124 is $7.00 in 1,000-unit quantities.  For more information on National's display portfolio, visit http://www.national.com/appinfo/fpd/
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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/display.html.

About National’s LVDS Technology
National Semiconductor's low-voltage differential signaling (LVDS) technology is a low-power, low-noise method for high-speed data transmission over copper interconnects.  LVDS solves current and future high-performance data transmission challenges in bandwidth-hungry applications by delivering data at gigabits per second at milliwatts of power.  National is the world’s largest supplier of high-speed LVDS products, according to Databean’s 2005 Analog IC Market Share survey.  National's LVDS products include interface line drivers and receivers, LVDS-LVDS signal conditioners, LVDS-LVDS switching/multiplexing/repeating functions, LVDS serializer/deserializers, FPD link display solutions and ADCs with high-speed digital interfaces.  For more information on National’s LVDS products, visit
http://LVDS.national.com

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
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