MAX3461

+5V、失效保护、20Mbps、PROFIBUS RS-485/RS-422收发器


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说明

MAX3460-MAX3464为用于RS-485及RS-422通信用高速差分总线接收器,该系列芯片按符合TIA/EIA-422-B、TIA/EIA-485-A、V.11和X.27标准设计。传送器符合PROFIBUS规范,54Ω负载时输出电平+2.1V、20Mbps数据速率且输出定时偏差小于2ns。每个器件内置一路三态差分线路驱动器和一路差分线路接收器。器件采用+5V电源运行,并带有真失效保护电路,当接收器输入开路或短路时输出均为逻辑高电平。这使得当传送器被禁止时,所有连接在端接了的总线上的接收器输出为逻辑高电平。

所有器件均为1/4单位负载接收器输入阻抗,允许128个收发器接入总线。在多落点、时钟分配应用中,驱动器和接收器的传输延迟保证低于20ns。驱动器短路电流限制和热关断保护驱动器不受过高功率耗散的损伤。驱动器和接收器分别为高电位和低电位使能,可以直接在外部连接在一起用做方向控制。
MAX3460、MAX3461:引脚配置 MAX3460、MAX3461:引脚配置 放大+

关键特性

  • 推荐用于PROFIBUS系统
  • 有保证的20Mbps数据速率
  • 发送器和接收器传输延迟为20ns
  • 发送器和接收器定时偏差2ns
  • 高差分驱动器输出电平(54Ω上2.1V)
  • 热插拔型
  • 1µA关断电源电流
  • 低电源电流要求(典型2.5mA)
  • 允许多达128个收发器接入总线
  • 采用真失效保护接收器保持兼容于EIA/TIA-485
  • 专为多点远程传送或有噪声长总线线路设计
  • 有全双工和半双工方案
  • 14引脚的版本带有相位选择,可纠正双绞线反接
  • 用于驱动器过载保护的电流限制及热关断
  • 应用

    • 高速RS-422通信
    • 高速RS-485通信
    • 工业控制局域网
    • 电平转换器
    • PROFIBUS应用

    Pricing Notes:
    This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    其它资源

    RS-485资源
    申请可靠性报告: MAX3461 
    型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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