On Semi NCV7425 LIN网络连接解决方案

1、on semi ncv7425 lin网络连接解决方案on semi 公司的ncv7425是全特性局部互连网络(lin) v2.1,用在lin协议控制器和物理间接口.器件还集成了低压降稳压器.总线±45 v,传输速率高达20k波特,输出电压3.3v或5v,负载高达150ma,主要用在汽车和工业网络.本文介绍了ncv7425主要特性,功能方框图,应用框图以及评估板ncv74250v1gevb主要特性,材料清单和布局图.the ncv7425 is a fully featured local interconnect network (lin) transceiver designed

2、 to interface between a lin protocol controller and the physical bus.the ncv7425 lin device is a member of the in vehicle networking (ivn) transceiver family of on semiconductor that integrates a lin v2.1 physical transceiver and a low drop voltage regulator. it is designed to work in harsh automoti

3、ve environment and is submitted to the ts16949 qualification flow.the lin bus is designed to communicate low rate data from control devices such as door locks, mirrors, car seats, and sunroofs at the lowest possible cost. the bus is designed to eliminate as much wiring as possible and is implemented

4、 using a single wire in each node. each node has a slave state machine that recognizes and translates the instructions specific to that function. the main attraction of the lin bus is that all the functions are not time critical and usually relate to passenger comfort.ncv7425主要特性:lin bus transceiver

5、lin compliant to specification revision 2.1(backward compatible to versions 2.0 and 1.3) and j2602bus voltage ±45 vtransmission rate up to 20 kbaudintegrated slope control for improved emi compatibilitypackagesoic 16 wide body green package with exposed padprotectionthermal shutdownindefinite s

6、hort circuit protection on pins lin and wake towards supply and groundload dump protection (45 v)bus pins protected against transients in an automotive environmentesd protection level for lin, inh, wake and vbb up to ±10 kvvoltage regulatortwo device versions: output voltage 3.3 v or 5 v for lo

7、ads up to 150 maunder voltage detector with a reset output to the supplied microcontrollerinh output for auxiliary purposes (switching of an external pull up or resistive divider towards battery, control of an external voltage regulator etc.)modesnormal mode: lin communication in either low (up to 1

8、0 kbaud) or normal slopesleep mode: vcc is switched “off” and no communication on lin busstand by mode: vcc is switched “on” but there is no communication on lin buswake up bringing the component from sleep mode into standby mode is possible either by lin command or digital input signal on wake pin wake up from lin bus can also be detected and fl