Tuesday 25 September 2007
Switch
Hernan Alcerreca
A new low-voltage differential signalling (LVDS) 4 x 4 crosspoint switch from National Semiconductor delivers the industry's best jitter performance (10 ps typical) at data transmission rates up to 3.125 Gbps, the company said. 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 demanding applications such as XAUI (telecom) and SMPTE 424M (pro video).
The device inputs have a wide common-mode voltage range that allows it 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 on the LVDS input and output pins to minimise insertion losses, component count and board space.
National Semiconductor
www.national.com
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