Project Analog - March 2008 - (Page 15)

Phy 1000BASE-KX 10GBASE-KX4 10GBASE-KX4 signaling speed 1.25 Gbaud 3.125 Gbaud 10.3125 Gbaud coding 8B/10B 8B/10B 64B/66B number of lanes 1 44 1 It is a low-cost option with less than 1 µs of latency. 10GBASE-LRM. This newly ratified standard supports distances up to 220 m on legacy FDDI-grade multimode cable at 1,310 nm. Electronic dispersion compensation is required at the receiver and components are still expensive but it allows systems to use installed FDDI fiber with a low latency of 650 ns. transCeiver modules Contents Viewpoint Wireless Communication Using IrDA® Wireless Design Choices Advanced Communication Solutions for Lighting Analog news tablE 1 thE 802.3aP sPEcification yiElds thrEE oPtions for bacKPlanE connEctivity. Parameter CX4 10GBASE-T 10GBASE-SR 10GbaseLRM medium Twinax Cat 6/Cat 6a MM fiber MM fiber (FDDI) distance 15 m 55 m/100 m 26-86 m 220 m latency Zero Moderate Low Low cost Low Moderate Low High, but leverages FDDI tablE 2 coPPEr and fibEr Phys ProvidE four oPtions for thE datacEntEr. Parameter xEnPaK x2 100 x 36 x 12 70-pin xPaK 85 x 40 x 10 70-pin xfP 78 x 18 x 10 30-pin sfP+ 56.6 x 13.8 x 8.5 20-pin Multi-Source Agreement (MSA) groups formed by industry players have established physical form factors for optical and copper transceivers, while standards bodies such as Optical Internetworking Forum (OIF) have established standards for electrical interfaces for 10-Gbit transceiver modules. Module form factors have migrated from the initial 300-pin MSA to the 70pin XENPAK, which has since given way to the smaller XPAK and X2. By moving some components outside the module, the 30-pin XFP is even more compact, while SFP+ is the smallest form factor yet—although it doesn’t support copper connections. To some extent, these modules share architecture. For the optical I/O they use similar transmit and receive optical subassemblies (TOSA and ROSA), while on the electrical side they use similar components such as transimpedance amplifiers (TIA), laser drivers, and modulators, CDR circuits, and SerDes components. There is good availability of fiber reaches among most module types and CX4 connectors are available on the 120 x 36 Form factor (mm) x 17 Connector type 70-pin Microchip analog page Interface products overview Sample center microchipDIRECT Reference designs/ app notes Technical training tablE 3 msa transcEivEr standards ProvidE fivE choicEs 15 · ProjeCt ANALog · mAr 08 http://www.microchip.com http://www.microchip.com/analog http://www.microchip.com/analog http://www.microchip.com/interface http://www.microchip.com/interface http://sample.microchip.com/Default.aspx?testCookies=true http://www.microchipdirect.com/catalogselection.aspx?returnURL=default.aspx http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1469&filter1=function&redirects=appnotes http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1469&filter1=function&redirects=appnotes http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1423

Table of Contents Feed for the Digital Edition of Project Analog - March 2008

Project Analog - March 2008 Contents Viewpoint About Project Analog Sponsor Wireless Communication Using the IrDA® Standard Protocol Wireless Design Choices Advanced Communication Solutions for Lighting Putting 10-GbE PHY Options Into Perspective Ease Into the Flexible CANbus Network Technology and Drivers for Mobile WiMAX Analog News—Analog News from Multiple Sources Enter to Win an iPhone Contact Project Analog Sponsor Treelink Microchip Advanced Parts Selector (MAPS)

Project Analog - March 2008

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