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ElecSuper MAX3485EESA+T(ES) MAX3485EESA
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Elec Super MAX3485EESA+T(ES)
- Type
- ELECSUPER
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ELECSUPER
- Electronic Component
- MAX3485EESA+T(ES)
- Electronic Component
- 1
- Package
- SOP-8
- Type
- Transceiver
- Electronic Component
- RS-485 / RS-422IC
- Electronic Component
- 0.176g
- Electronic Component
- 256
- Electronic Component
- 1
- Features
- Tx / Rx;;; Low Power
- Electronic Component
- BM0258806326
- Operating Temperature
- 40℃~+125℃
- Operating Voltage
- 3V~5.5V
- Receiver
- 1
- Data
- 14Mbps
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MAX3485EESA+T(ES) 产品概述
一、产品简介
MAX3485EESA+T(ES) 是一款用于RS-485/RS-422半双工总线的收发器，属于1驱动/1接收拓扑，适合点对点或多点通信。芯片工作电压宽（3.0V～5.5V），可在3.3V和5V系统中直接使用，能在工业环境下稳定工作，针对现场总线设计具备增强的静电防护和宽温度范围。
二、主要技术参数
- 器件类型：收发器（半双工）
- 驱动器数：1；接收器数：1
- 工作电压：3.0 V ～ 5.5 V
- 最大数据速率：14 Mbps
- 总线节点数：256（多点支持）
- 静电保护：±15 kV（接触/空气放电，等级较高）
- 工作温度：-40 ℃ ～ +125 ℃（工业级）
- 通讯模式：半双工
- 封装形式：SOP-8
三、封装与引脚功能（概要）
封装为标准 SOP-8，常见引脚功能包括：
- VCC、GND：电源与地
- A、B：差分收发总线端
- DI（驱动输入）：来自主控器的数据输入
- RO（接收输出）：总线接收数据输出
- DE（驱动使能）、RE（接收使能）：控制器用于切换发送/接收状态 实际引脚排列请以器件厂商数据手册为准。
四、典型应用场景
- 工业自动化现场总线（PLC 与远端模块通信）
- 仪器仪表数据采集（多点间隔传输）
- 楼宇控制系统、安防与门禁通信
- 串行长线传输场景（异步或半双工协议）
五、设计与 PCB 布局建议
- 电源去耦：VCC 旁放置 0.1 µF 陶瓷电容，贴近引脚以降低高频噪声。
- 差分线对布线：A/B 为差分对，尽量走并行且长度匹配，避免与高频开关电源走线交叉。
- 终端电阻：长线总线上在收发端使用 120 Ω 终端电阻，放置于接收端近邻处以减少反射。
- 偏置电阻（上拉/下拉）：在多点网络中，增加合适偏置以保证空闲总线时的确定电平（fail-safe）。
- ESD 与浪涌保护：虽器件自带 ±15 kV 静电防护，建议在接入端加外部 TVS 或冗余保护以增强雷击/浪涌鲁棒性。
- 控制 DE/RE：半双工模式下建议用单个GPIO同时控制 DE 与 RE（RE 为低有效），以简化主控逻辑并避免冲突。
六、注意事项与选型建议
- 依据系统电压（3.3V/5V）确认接口兼容性并合理配置功耗管理。
- 数据率设置与线缆长度相互制约；14 Mbps 为器件上限，实际速率应根据布线质量和长度进行验证。
- 多节点系统中应考虑地址、仲裁与总线占用策略，避免多个驱动同时上电造成总线冲突。
- 若需替代或比较，可参考市场上同类 RS-485 收发器系列，但具体引脚、电气规范请以目标型号数据手册为准。
总结：MAX3485EESA+T(ES) 以其宽电压、工业级温度范围与较强的静电防护特点，适合工业现场和长线多点通信环境。在系统设计时注意终端匹配、差分布线和使能控制逻辑，可获得稳定可靠的串行通信性能。
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