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ADI/LINEAR MAX13485EESA+T MAX13485EESA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ADI(Analog Devices) / LINEAR MAX13485EESA+T
- Type
- ADI/LINEAR
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ADI(Analog Devices) / LINEAR
- Electronic Component
- MAX13485EESA+T
- Electronic Component
- 1
- Package
- SOP-8
- Type
- Transceiver
- Electronic Component
- RS-485 / RS-422IC
- Electronic Component
- 0.219g
- Electronic Component
- 128
- Electronic Component
- 1
- Features
- Low Power
- Electronic Component
- BM0258756053
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 4.75V~5.25V
- Receiver
- 1
- Data
- 500Kbps
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MAX13485EESA+T 产品概述
一、产品简介
MAX13485EESA+T 是 ADI（原 Maxim/Linear）系列的一款半双工收发器，集成 1 路驱动器和 1 路接收器，支持 RS-422/RS-485 通讯。器件工作电压为 4.75V ~ 5.25V，典型应用于工业现场总线、多点通信和对抗恶劣环境的串行链路中。封装为 8-SOIC（SOP-8），便于插件与表面贴装工艺。
二、主要性能参数
- 通讯模式：半双工（1 驱动 / 1 接收）
- 数据速率：最高支持 500 kbps
- 总线节点数：最多可支持 128 个节点（多点网络）
- 工作电压范围：4.75V ~ 5.25V
- 静态电流：4.5 mA（典型）
- 环境温度范围：-40℃ ~ +85℃
- 静电保护（ESD）：±15 kV
- 封装：8-Pin SOIC（SOP-8 / 8-SOIC）
三、应用场景
- 工业现场总线与楼宇自动化（多点 RS-485 网络）
- PLC 与控制器之间的远距离串行通信
- 数据采集、楼宇安防、仪器仪表的差分通信接口
- 需要抗干扰及高可靠性的工业环境
四、设计与使用要点
- 总线阻抗匹配：在总线两端建议使用约 120 Ω 终端电阻以减少反射，特别是在长线或高数据速率下。
- 偏置电阻：为保证空闲状态可确定，建议在总线上布置合适的偏置（上拉/下拉）电阻，避免浮空导致误触发。
- 半双工控制：通过方向控制信号（DE/RE 或相应的控制引脚）管理发送/接收状态，避免驱动冲突。
- 电源与去耦：在 VCC 附近放置 0.1 µF 陶瓷去耦电容并靠近引脚布局，以抑制瞬态干扰。
- 布局与接地：差分对走线尽可能并行且长度匹配，接地平面连续以降低 EMI。
- ESD 与浪涌保护：虽然器件自身有 ±15 kV 静电保护，仍建议在接入外部接口处使用额外的瞬态抑制器件以提高系统鲁棒性。
五、选型理由与注意事项
MAX13485EESA+T 以其在 5V 工况下稳定的低静态电流（4.5 mA）、工业温度范围及较高的 ESD 抗扰能力，适合要求长期稳定运行和抗干扰性的多节点 RS-485 应用。选型时需确认系统总线拓扑、最大节点数与数据速率匹配，并依据 PCB 布局和现场环境决定是否需要额外的浪涌/ESD 保护。
六、总结
作为一款 1/1 半双工 RS-422/RS-485 收发器，MAX13485EESA+T 在工业通信系统中提供了可靠的差分通信接口解决方案。合理的终端与偏置、电源去耦与布线设计，能够充分发挥其在多节点网络中的稳定性与抗干扰能力。
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