原标题：Freescale MC33662汽车LIN总线连接解决方案

　　freescale公司的MC33662是汽车LIN总线,支持汽车网络,和LIN协议标准1.3, 2.0, 2.1和SAEJ2602-2CAN兼容,工作电压VSDUP 7-18VDC,功能高达27VDC,在卸载时能处理40V,LIN总线能经受15.0kV ESD IEC61000-4-2,WAKE引脚能经受20kV ESD,VSUP引脚能经受25kV ESD,目标应用在汽车仪表盘,HVAC,汽车照明,门窗提升和座位控制, 安全气袋,车体控制模块和中央网关,驾驶员信息系统和动力总成于混合系统以及LIN连接系统.本文介绍了MC33662主要特性,简化方框图,应用电路以及主/从节点典型应用电路.

　　The Local Interconnect Network (LIN) is a serial communication protocol, designed to support automotive networks in conjunction with a Controller Area Network (CAN). As the lowest level of a hierarchical network, LIN enables cost-effective communication with sensors and actuators when all the features of CAN are not required. The three 33662 versions are designed to operate at different maximum baud rates. The MC33662LEF and MC33662SEF offer a normal baud rate (20 kbps), and the MC33662JEF, a slow baud rate (10 kbps). They integrate a fast baud rate (above 100 kbps), as reported by the RXD pin for test and programming modes. They provide excellent EMC (Electromagnetic Compatibility) and Radiated Emission performance, ESD (Electrostatic Discharge) robustness, and safe behavior, in the event of a LIN bus short-to-ground, or a LIN bus leakage during low-power mode.

　　MC33662主要特性:

　　•Operational from a VSUP of 7.0 to 18V DC, functional up to 27V DC, and handles 40 V during Load Dump

　　•Compatible with LIN Protocol Specification 1.3, 2.0, 2.1, and SAEJ2602-2

　　•Active bus wave shaping, offering excellent radiated emission performance

　　•Sustains up to 15.0 kV minimum ESD IEC61000-4-2 on the LIN Bus, 20 kV on the WAKE pin, and 25 kV on the VSUP pin

　　•Very high immunity against electromagnetic interference

　　•Low standby current in Sleep mode

　　•Over-temperature protection

　　•Local and remote Wake-up capability reported by the RXD pin

　　•Fast baud rate selection reported by RXD pin

　　•5.0 V and 3.3 V compatible digital inputs without any required external components

　　MC33662目标应用:

　　Automotive

　　Instrument Cluster

　　Heating Ventilation and Air Conditioning (HVAC)

　　Automotive Lighting

　　Doors, Window Lift and Seat Control

　　Airbags

　　Body Control Module and Central Gateway

　　Body Electronics

　　Driver Information Systems

　　Powertrain and Hybrid Systems

　　Gasoline and Diesel Engine Management

　　Hybrid Electric Vehicles

　　Body Electronics

　　Driver Information Systems

　　Powertrain and Hybrid Systems

　　Connectivity

　　Local Interconnect Network (LIN)

　　图1.MC33662简化方框图

　　图2.MC33662 LIN接口

　　图3.MC33662主LIN总线简化应用电路图

　　图4.MC33662主节点典型应用电路

　　图5.MC33662从节点典型应用电路