Maxim MAX33041E 3.3V 5Mbps CAN收发器解决方案

Maxim公司的 MAX33040E/MAX33041E是 3.3V 5Mbps控制器局域网络(CAN)收发器,集成了用于工业应用的保护特性.器件具有对CANH和 CANL扩展的±40V故障保护,这对那些过压保护的设备是必需的.器件还集成了±40kV ESD HBM,CANH 和CANL的输入共模性能(CMR)±25V,超过ISO 11898-2 CAN标准的-2V到+7V,这使得这些器件非常适合于那些中等电噪音能影响两个节点或系统间地电平的应用.这些器件具有关断引脚和多功能待机引脚.器件工作在高速CAN数据速率,短距离网络高达5Mbps.大型网络的最高速度由节点数量,所使用的电缆,支线长度以及其它因素限制.MAX33040E/MAX33041E包括支配性暂停,以防止总线由于控制器误差或TXD输入故障所引起的锁住.当TXD在支配状态(低)比tDOM长时,驱动器切换到非占用状态,释放总线和和其它节点进行通信.这些器件具有STBY引脚适应三种操作:低电流功耗的待机模式,正常高速模式或低转换速率模式.工作温度-40°C 到+125°C.主要用在工业设备,仪表,马达控制,建筑物自动化,工业无人机,服务和教育机器人.本文介绍了MAX33040E/MAX33041E主要优势和特性,简化框图和功能框图,多点CAN总线框图以及MAX33041E屏蔽板主要特性,电路图,材料清单和PCB设计图.

 The MAX33040E/MAX33041E are +3.3V control area network (CAN) transceivers with integrated protection for industrial applications. These devices have extended ±40V fault protection on CANH and CANL for equipment where overvoltage protection is required. They also incorporate high ±40kV ESD HBM and an input common-mode range (CMR) of ±25V on CANH and CANL, exceeding the ISO 11898-2 CAN standard of -2V to +7V. This makes these parts well suited for applications where there is moderate electrical noise that can influence the ground levels between two nodes or systems. These parts feature a shutdown pin and a multifunction standby pin.

These devices operate at a high-speed CAN data rate, allowing up to 5Mbps on short distance networks. Maximum speed on large networks may be limited by the number of nodes, the type of cabling used, stub length, and other factors. The MAX33040E/MAX33041E include a dominant timeout to prevent bus lockup caused by controller error or by a fault on the TX...