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National Semiconductor Samples Industry’s Lowest-Wire-Count LVDS Chipset for Flat Panel Displays in Automotive, Industrial and Security Applications

High-speed Serializer and Deserializer Feature Programmable Pre-emphasis for 10 Meters of Cable Drive

Oct 18, 2005

YOKOHAMA, Japan and SANTA CLARA, Calif. - October 18, 2005 - National Semiconductor Corporation (NYSE:NSM) introduced a new high-speed low-voltage differential signaling (LVDS) serializer/deserializer (SerDes) chipset that serializes 24 bits of data over a single differential pair (2 wires) in flat-panel display applications.  In 800 by 480 resolution liquid crystal displays (LCDs), the DS90C241 serializer and DS90C124 deserializer achieve the same level of image quality with just two wires compared to previous generations of LVDS interfaces which required eight wires.  The SerDes chipset saves system cost by narrowing data paths that reduces PCB layers, cable width, connector size and pin count.

The DS90C241/124 chipset is well-suited for applications such as automotive navigation and rear seat infotainment, in-flight entertainment systems, surveillance systems, remote display applications, CMOS/CCD imagers, point-of-sale (POS) terminals and automatic teller machines.  The chipset features AC coupling support, DC balance and pre-emphasis that will support up to 10 meters of cabling length.

“The automotive semiconductor content market, in particular, is undergoing double-digit growth.  Navigation, safety and infotainment systems are driving the use of LCDs as a standard feature in most luxury passenger vehicles,” said Todd D. Whitaker, National’s product line director for the Flat Panel Displays Division.  “National developed the DS90C241 and DS90C124 to provide manufacturers with a lower interconnect count and longer-length cable in order to reduce the overall system cost.”

About the DS90C241 and DS90C124 Chipset
The DS90C241 and DS90C124 chipset converts 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 cable distances.  Proprietary data encoding enables a DC-balanced bit stream over the serial link.  Key features and benefits include:

  • Frequency of 5 to 35 MHz supports a wide variety of LCD panel resolutions    
  • Data payload of 24:1 serialization and 840 Mbps of bandwidth    
  • Wide temperature support of -40 degrees C to 105 degrees C    
  • AC couple support enables short-circuit protection of the serial link    
  • DC-balanced transmission    
  • Voltage range of 3.0V to 3.6V    
  • No external reference clock or oscillator required at the deserializer    
  • Programmable pre-emphasis for long cable drive    
  • Low EMI emissions

For more information or to order samples of the DS90C241 and DS90C124, visit http://www.national.com/appinfo/fpd/serdes.html.

Pricing and Availability
Samples of the DS90C241 and DS90C124 are available now to select customers, with production quantities available in March 2006.  The products are priced at $6 in 1,000-unit quantities and offered in a 48-pin, 7 mm by 7mm by 1 mm TQFP package.  For more information on National's display portfolio, visit http://www.national.com/appinfo/fpd/

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.

National’s Analog Technology Makes Automobiles Smarter
National has supplied silicon for the automotive market since silicon made its first appearance in vehicles more than four decades ago.  With a broad portfolio of more than 250 products, National’s chips are found in nearly every automobile subsystem.  Whether it’s power management, operational amplifiers, temperature sensors or data converters, National continues to meet the demands of today’s automotive systems and emerging systems such as telematics, infotainment, driver information and automation systems, wireless connectivity, in-vehicle networking and drive-by-wire.  For more information on National’s automotive products, visit http://www.national.com/appinfo/automotive/

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