National Semiconductor Corporation announced that the company's PowerWise® energy-efficient chip family adds two low-power, low-voltage differential signaling (LVDS) 2x2 crosspoint switching circuits. The cross-point switch circuit channel of the DS25CP102 consumes only 125mW and delivers data at up to 3.125Gbps with jitter of only 6ps (typ), the lowest in the industry. The chip features two options: transmit pre-emphasis and receive equalization to ensure that signals in the cable and FR-4 backplane can be routed further. Another crosspoint switch circuit model DS10CP152 has a lower speed (1.5Gbps), making it ideal for short-haul transmission systems that do not require signal conditioning. The chip has the advantage of very low jitter (typically 9ps) and consumes only 57mW per channel.
The DS25CP102 and DS10CP152 chips can be used as splitters or combiners to provide high-speed signal path selection and switching for OC-48 telecom equipment and professional-grade video systems with standard definition, high definition and 3Gbps serial digital interface (SDI). Features. Video and video delivery systems can also use these two chips to separate two data streams for selection or to perform a splitter function to drive two monitors. Because these two chips have excellent performance in jitter and signal adjustment, OEMs can use the lower cost cables, connectors and related components as long as they use these two chips. National's two 2x2 crosspoint switching circuits are fabricated using the company's proprietary silicon germanium (SiGe) BiCMOS-8 process technology, which significantly increases the performance/power ratio of high-speed interface circuits.
National's 2x2 crosspoint switching circuit features a pin-selectable signal conditioning feature that reduces signal jitter and allows signals to be transmitted over longer distances without the need for repeaters. The common-mode input voltage range of these two switching circuits is extremely wide, and supports signals such as LVPECL, CML, and LVDS even without a coupling capacitor. The DS25CP102 and DS10CP152 chips can directly receive signals from 90nm FPGAs and 65nm ASICs. In addition, the two chips also feature 8kV ESD protection. The LVDS has 100 Ohm internal termination resistors on the input and output pins to help reduce plug loss and component count, as well as reduce board area. .
National Semiconductor's cross-point switching circuit series is constantly available in new models, the two chips are the latest two models, and the DS25CP104 and DS10CP154 are two other recently introduced LVDS 4x4 crosspoint switching circuits.
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