Microchip LAN8770 100BASE－T1以太网PHY收发器解决方案

Microchip公司的LAN8770是紧凑的成本效益的单端口100BASE-T1以太网PHY层收发器,和IEEE 802.3bw-2015标准兼容.器件在单股非屏蔽双绞线(UTP)电缆上提供100Mbps发送和接收功能,支持电缆长度长达15米. LAN8770可工作在Grade 1汽车温度(-40C 到 +125C),最佳用在AEC-Q100汽油应用如汽车辅助驾驭系统(ADAS),信息娱乐系统,远程信息处理,智能天线和车内主干线. LAN8770支持以太网MAC通过标准MII/RMII/RGMII接口(RGMII仅限于LAN8770R).对于RGMII和RMII应用,可分别提供125MHz 或50MHz基准时钟输出,而集成的SMI接口提供迅速的寄存接入和配置.器件具有3级脉幅调制(PAM-3)线路编码和回声消除功能. EtherGREEN™能量效率如超低功耗睡眠模式(典型12μA)和支持本地叫醒以及睡眠请求识别.主要用在高级驾驶员辅助系统(ADAS), 信息娱乐系统,远程信息处理,智能天线和车内主干线以及网关.本文介绍了LAN8770主要优势和亮点, 系统级框图以及评估板EVB-LAN8770-RMII主要特性,框图,电路图,材料清单和PCB设计图.

The Microchip LAN8770 is a compact, cost-effective, single-port 100BASE-T1 Ethernet physical layer transceiver compliant with the IEEE 802.3bw-2015 specification. The device provides 100 Mbit/s transmit and receive capability over a single Unshielded Twisted Pair (UTP) cable, supporting cable lengths of up to at least 15m. The LAN8770 is available in a Grade 1 Automotive (-40C to +125C) temperature range and is optimized for AEC-Q100 automotive use cases such as Automated Driver-Assistance Systems (ADAS), infotainment, telematics, smart antennas, and in-vehicle backbones.

The LAN8770 supports communication with an Ethernet MAC via standard MII/RMII/RGMII interfaces (RGMII LAN8770R only). An optional 125MHz or 50MHz reference clock output is provided for RGMII and RMII applications, respectively. Reverse MII mode (LAN8770M only) provides the ability to connect two PHYs back-to-back. An integrated SMI interface provides rapid register access and configuration.

Microchips LAN8770 EtherGREEN™ energy efficient technology provides low-power 100BASE-T1 PHY operat...