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National Semiconductor Doubles Data Transmission Reach of FR-4 Backplanes with Easy-to-Use Power-Saver Equalizers

Jul 31, 2007

July 31, 2007 — Two new power-saver equalizers from National Semiconductor Corporation (NYSE:NSM) outperform competitive passive equalizers and are more versatile and easier to use than active equalizers.

The DS38EP100 power-saver equalizer can equalize 40 inches of FR-4 printed circuit board (PCB) at a data transmission rate of 3.125 Gbps -- twice the reach of other passive equalizers. Compared to active equalizers, National’s DS38EP100 and DS80EP100 are more versatile. They require no power or ground routing and they accept any high-speed differential signal technology, including current-mode logic (CML), low-voltage differential signaling (LVDS) and low-voltage positive emitter coupled logic (LVPECL). Additionally, they are bi-directional, offering the same equalization gain in either direction. 

The DS38EP100 and DS80EP100 are well-suited for many applications such as routers, storage subsystems and wireless base stations. They are supplied in a tiny 6-pin LLP® package for use in space- and layout-constrained systems, such as cables or connectors in medical, security and industrial imaging systems. The DS38EP100 operates from 1 Gbps to 5 Gbps, while the DS80EP100 operates from 5 Gbps to 10 Gbps. They address a variety of systems using high-definition multimedia interface (HDMI) or digital visual interface (DVI) interface standards, as well as systems using a PCI Express or XAUI interface.

With no power or ground required, system designers can easily place these power-saver equalizers in cables, connectors or backplanes, and they can add them to a board with a minimum of layout changes. They can also cascade these devices with an active equalizer or limiting amplifier to further extend FR-4 and cable transmission links.

In addition to doubling the reach of FR-4, the DS38EP100 can equalize up to five meters of cost-effective 28 American Wiring Gauge (AWG) HDMI cable at a data rate of 3.4 Gbps. It features 7 dB of maximum boost and its input and output impedance is 100 Ohms. The DS38EP100 supports all data coding techniques such as 8b/10b and scrambled signals. The DS80EP100 offers similar technical features and at 10 Gbps can equalize 20 inches of FR-4 and five meters of 26 AWG cable. Both equalizers operate over the full -40 degrees C to 85 degrees C temperature range.

The DS38EP100 and DS80EP100 are the latest additions to National’s growing family of signal-conditioning equalizers, which include the 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 http://www.national.com/appinfo/interface/

Pricing and Availability
Available now, the DS38EP100 is priced at $1.30 each and the DS80EP100 is $1.65 each, both in 1,000-unit quantities. For more information on the DS38EP100 or to order samples and an evaluation board, visit http://www.national.com/pf/DS/DS38EP100.html
. For more information on the DS80EP100 or to order samples and an evaluation board, visit http://www.national.com/pf/DS/DS80EP100.html.

Note to editors: To view a high-resolution downloadable photo of these products, visit National's photo gallery.

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 and a variety of broad electronics markets, including 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 www.national.com