A new low-voltage differential signaling (LVDS) 4 x 4 crosspoint switch from National Semiconductor Corporation delivers what is said to be the industry's best jitter performance — 10 picoseconds, typical — at data transmission rates up to 3.125 Gb/s. The DS25CP104 is well-suited for clock and data switching/routing in telecom, professional video, storage and automated test equipment (ATE) applications. The low-power LVDS device's superior jitter and signal conditioning performance enables OEMs to use less costly cable, connectors and components.

The DS25CP104 offers a feature set to enhance signal integrity in applications such as XAUI (telecom) and SMPTE 424M (pro video). For example, the product consumes only 122 mW per channel while boosting and equalizing FPGA or ASIC signals over cables and FR-4 backplanes.

The device inputs have a wide common-mode voltage range that enables them to accept low-voltage, positive emitter-coupled-logic (LVPECL), current-mode-logic (CML) and LVDS signal levels without using coupling capacitors. The system designer has maximum flexibility configuring the DS25CP104 with external pin control or a serial system management (SM) bus. The crosspoint also features 8 kV electrostatic discharge (ESD) protection and 100 Ohm termination at the LVDS input and output pins to minimize insertion losses, component count and board space.

National is also introducing its DS10CP154, a lower-speed, lower-power 4 x 4 crosspoint switch targeting applications up to 1.5 Gb/s that includes many of the same features as the DS25CP104.

The DS25CP104 (3.125 Gb/s) and lower-power DS10CP154 (1.5 Gb/s) are available in 40-pin LLP(R) packages and are priced at $8.75 and $4.75, respectively, each in 1000-unit quantities.

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