DS64EV400 Equalizer from National’s PowerWise Energy-Efficient Product Family Compensates Media Losses for up to 10 Gbps Data Transfers While Consuming Only 94 mW per Channel

October 22, 2007 –
A new programmable quad equalizer from National Semiconductor Corporation (NYSE:NSM) extends the reach of high-speed serial buses up to 10 Gbps data transmission rates, while consuming only 94 mW per channel. The DS64EV400, from National’s PowerWise® energy-efficient product family, provides high-speed signal transmission over backplanes and cables used in storage area networking (SAN), communications infrastructure and automated test equipment (ATE).

The DS64EV400 compensates for transmission medium losses and reduces deterministic jitter for four data transmission channels. The device provides 20 dB of boost to equalize up to 10m of CAT5 cable, up to 40 inches of FR-4 printed circuit board (PCB) at data transmission rates up to 6.4 Gbps and up to 30 inches of FR-4 at data rates up to 10 Gbps -- with only 0.175 units interval (UI) of residual jitter at the equalizer output. National fabricates this signal-conditioning part on its proprietary silicon-germanium (SiGe) BiCMOS-8 process technology, which provides high performance-to-power ratios for high-speed interface devices. Along with featuring the lowest power at this performance level, inactive channels can be automatically shutdown for further power savings of 85 percent per channel.

The quad equalizer’s features make it easy to use with field-programmable gate arrays (FPGAs) and transmission media. Each equalizer channel has eight equalization levels simultaneously set by three control pins, or individually programmed through a serial System Management (SM) Bus. The DS64EV400 supports both AC and DC-coupled data paths for long-run-length PRBS-31 data patterns and balanced 8b/10b codes. It uses differential current-mode logic (CML) inputs and outputs, and features 8 kV of electrostatic discharge (ESD) protection. Additionally, the equalizer includes a loss-of-signal (LOS) detect for each channel, operates over the full -40 degrees C to 85 degrees C temperature range and is powered from either a 2.5V or 3.3V supply.

National also is introducing the DS32EV400, a programmable quad equalizer optimized for applications up to 3.2 Gbps that includes many of the same features as the DS64EV400. These devices are the latest additions to National’s growing family of signal-conditioning equalizers, which include the DS38EP100 and DS80EP100 power-saver equalizers, DS16EV5110 video cable equalizer, DS25BR110 LVDS equalizer, DS40MB200 dual mux-buffer, and DS15BA101 and DS15EA101 cable extender chipset.

About National’s Interface Portfolio
National Semiconductor, the LVDS and CML 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 2006 Analog IC Market Share survey. For more information on National’s interface products, visit

Pricing and Availability
The DS64EV400 (6.4 Gbps to 10 Gbps) and DS32EV400 (1 Gbps to 3.2 Gbps) are available now in 7 mm by 7 mm, 48-pin leadless LLP® packages and are priced at $16 and $13, respectively, both in 1,000-unit quantities. For more information on the DS64EV400 or to order samples and an evaluation board, visit
 http://www.national.com/pf/DS/DS64EV400.html. For more information on the DS32EV400 or to order samples and an evaluation board, visit http://www.national.com/pf/DS/DS32EV400.html.

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’s PowerWise Brand
National’s PowerWise brand reflects the company’s energy-efficient product portfolio.  It signifies products with outstanding performance-to-power at the component level, as well as products that provide an outstanding, energy-efficient solution when coupled with other National parts.  National’s PowerWise family of products features energy-efficient power management, operational amplifiers, interface and data conversion products.  For more information about National’s PowerWise brand, visit:

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, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at

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