SMSCLAN9303M三端管理以太网交换方案  2012/3/1

         SMSC公司的LAN9303 和LAN9303M是高性能小型全特性3端管理以太网交换器件,特别设计用于消费类电子产品,具有缩短开发周期,低成本,灵活性和易于集成等特性.支持per-port IEEE 802.1Q VLAN,直接和家庭网络技术如MoCA, HomePlug, HomePNA™ (HPNA)和光纤连接,并支持Turbo MII模式,单电源3.3V工作,目标应用在有线电视,卫星电视和IP机顶盒(STB),数字电视,DVR/PDVR,VoIP/视频电话,家庭网络,测试测量设备以及工业自动化和控制.本文介绍了LAN9303 和LAN9303M的产品亮点,系统方框图, LAN9303M 72QFN 用户评估板方框图,详细电路图和所用材料清单.

LAN9303/9303M: Industry’s Smallest 3-port 10/100Managed Ethernet Switches with Single/DualMII/RMII/Turbo MII Support

SMSC’s LAN9303 and LAN9303M are high-performance, small-footprint, full-featured 3-port managed Ethernet switches. Both devices are application-optimized for consumer electronics designs which have a rapid development cycle and require low-cost switching functionality, flexibility and ease of integration.

Featuring the industry’s smallest form factor 3-port switches, the LAN9303/9303M support compact PCB design and single (LAN9303) or dual (LAN9303M) MII/RMII/Turbo MII (Media Independent, Reduced Media Independent and Turbo Media Independent Interfaces).

The LAN9303M’s second MII/RMII/Turbo MII port enables direct connectivity with home networking technologies such as MoCA, HomePlug, HomePNA™ (HPNA) and Optical Fiber, among others. Both devices support Turbo MII mode to accomplish network speeds up to 200 Mbps. The virtual PHY feature mimics a single PHY connection through the MII/RMII/Turbo MII interface to the host SoC, which can reduce software development time. This feature also allows system designers to swap the single PHY and Ethernet switch to create multiple SKUs from the same software driver. Additionally, the LAN9303/9303M offer the industry’s highest (±8kV/15kV) perport ESD protection.

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