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National Semiconductor’s Low-Power, LVDS 2x2 Crosspoint Switch with Equalization and Pre-Emphasis Delivers Industry-Leading Signal Integrity


New Crosspoints from National’s PowerWise Energy-Efficient Product Family Consume Less Than 125 mW per Channel, with Jitter Performance as Low as 6 ps at Data Rates up to 3.125 Gbps.

National Semiconductor Corporation (NYSE:NSM) today added two low-power, low-voltage differential signaling (LVDS) 2 x 2 crosspoint switches to its PowerWise® energy-efficient product family. The DS25CP102 delivers the industry’s best jitter performance (6 ps typical) at data transmission rates up to 3.125 Gbps, while consuming only 125 mW of power per channel. The device features selectable transmit pre-emphasis and receive equalization to extend signal transmission reach in cables and FR-4 backplanes. The lower-speed (1.5 Gbps) DS10CP152 addresses short-haul applications that do not require signal conditioning. It delivers excellent jitter performance (9 ps typical), with very low power consumption of 57 mW per channel.

The DS25CP102 and DS10CP152 work as splitters or multiplexers for high-speed signal routing and switching in OC-48 telecom as well as standard-definition (SD), high-definition (HD) and 3-Gbps serial digital interface (SDI) professional video applications. They are also used in video and imaging transport applications to select between two data streams or as a splitter to drive two monitors. Their superior jitter and signal conditioning performance allow OEMs to use less costly cable, connectors and components. National built these 2 x 2 crosspoint switches with its proprietary silicon-germanium (SiGe) BiCMOS-8 process technology, which provides the highest performance-to-power ratios for high-speed interface devices.

National’s 2x2 crosspoints offer pin-selectable signal-conditioning features to reduce data-dependent jitter and eliminate the need for repeaters to extend signal transmission reach. Their inputs have a wide common-mode voltage range that allow the crosspoints to accept low-voltage positive-emitter-coupled logic (LVPECL), current-mode logic (CML) and LVDS signal levels without using coupling capacitors. The DS25CP102 and DS10CP152 accept signals directly from the leading 90 nm and 65 nm field-programmable gate arrays (FPGAs) and application-specific integrated circuits (ASICs). They feature 8 kV electrostatic discharge (ESD) protection and 100-Ohm termination on the LVDS input and output pins to minimize insertion losses, component count and board space.

These devices are the latest additions to National’s growing family of crosspoint switches, which include the recently announced DS25CP104 and DS10CP154 LVDS 4x4 crosspoints.

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
Available now, the DS25CP102 (3.125 Gbps) is supplied in a space-saving 16-pin LLP® package and the lower power DS10CP152 (1.5 Gbps) is supplied in a 16-pin narrow SOIC package. The DS25CP102 is priced at $5.25 and the DS10CP152 is $3.65, each in 1,000-unit quantities. For more information on the DS25CP102 or to order samples and an evaluation board, visit For more information on the DS10CP152 or to order samples and an evaluation board, visit


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