原标题：NXPTJA1041高速CAN解决方案

　　NXP 公司的TJA1041是高速CAN收发器，为协议控制器和控制器局域网(CAN)节点间提供了先进的接口，接口标准和ISO 11898兼容，通信速率高达1Mbps，有极好的电磁兼容(EMC)性能和非常低的功耗，广泛用于汽车电子。

　　本文介绍了TJA1041的主要性能，方框图，典型的应用电路图以及用于汽车电子的瞬态特性和时序测试电路图。

　　TJA1041 High speed CAN transceiver

　　The TJA1041 provides an advanced interface between the protocol controller and the

　　physical bus in a Controller Area Network (CAN) node. The TJA1041 is primarily intended for automotive high-speed CAN applications (up to 1 Mbit/s). The transceiver provides differential transmit capability to the bus and differential receive capability to the CAN controller. The TJA1041 is fully compatible to the ISO 11898 standard, and offers

　　excellent ElectroMagnetic Compatibility (EMC) performance, very low power

　　consumption, and passive behavior when supply voltage is off. The advanced features

　　include:

　　Low-power management, supporting local and remote wake-up with wake-up source

　　recognition and the capability to control the power supply in the rest of the node

　　Several protection and diagnosis functions including short circuits of the bus lines and

　　first battery connection

　　Automatic adaptation of the I/O-levels, in line with the supply voltage of the controller

　　主要特性：

　　1.Optimized for in-vehicle high speed communication

　　Fully compatible with the ISO 11898 standard

　　Communication speed up to 1 Mbit/s

　　Very low ElectroMagnetic Emission (EME)

　　Differential receiver with wide common-mode range, offering high ElectroMagnetic

　　Immunity (EMI)

　　Passive behavior when supply voltage is off

　　Automatic I/O-level adaptation to the host controller supply voltage

　　Recessive bus DC voltage stabilization for further improvement of EME behavior

　　Listen-only mode for node diagnosis and failure containment

　　Allows implementation of large networks (more than 110 nodes)

　　2.Low-power management

　　Very low-current in Standby and Sleep mode, with local and remote wake-up

　　Capability to power-down the entire node, still allowing local and remote wake-up

　　Wake-up source recognition

　　3.Protection and diagnosis (detection and signalling)

　　TXD dominant clamping handler with diagnosis

　　RXD recessive clamping handler with diagnosis

　　TXD-to-RXD short-circuit handler with diagnosis

　　Overtemperature protection with diagnosis

　　Undervoltage detection on pins VCC, VI/O and VBAT

　　Automotive environment transient protected bus pins and pin VBAT

　　Short-circuit proof bus pins and pin SPLIT (to battery and to ground)

　　Bus line short-circuit diagnosis

　　Bus dominant clamping diagnosis

　　Cold start diagnosis (first battery connection)

　　图1. TJA1041方框图

　　图2. TJA1041和3 V微控制器电型应用电路图

　　图3. TJA1041用于汽车电子的瞬态特性测试电路图

　　图4. TJA1041时序特性测试电路图