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JSMSEMI MAX3485CSA-JSM MAX3485CSA
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- JSMSEMI MAX3485CSA-JSM
- Type
- JSMSEMI
- Minimum package
- 4000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- JSMSEMI
- Electronic Component
- MAX3485CSA-JSM
- Electronic Component
- 1
- Package
- SOP-8
- Type
- Transceiver
- Electronic Component
- RS-485 / RS-422IC
- Electronic Component
- 0.106g
- Electronic Component
- 32
- Electronic Component
- 1
- Features
- Tx / Rx
- Electronic Component
- BM0257659584
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 3.3V
- Receiver
- 1
- Data
- 12Mbps
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MAX3485CSA-JSM 产品概述
一、产品概述
MAX3485CSA-JSM（品牌：JSMSEMI/杰盛微）是一款单通道差分收发器，面向半双工差分总线通信应用而设计。器件工作电压为3.3V，支持最高12Mbps的数据速率，单芯片包含1个驱动器与1个接收器，适用于多节点（最多32节点）的工业与楼宇自动化网络。
二、主要特点
- 单驱动器、单接收器，半双工通信模式
- 工作电压：3.3V，便于与主流微控制器直接接口
- 最大数据速率：12Mbps，满足高速差分通信需求
- 支持网络节点数：最多32个节点
- 静态（静态待机）电流：约500µA，低功耗特性适合长时间运行设备
- 工作温度范围：-40℃ 到 +85℃，适应工业级环境
- 封装形式：SOP-8，便于通用PCB装配
- 静电保护：±8kV（人体模型），提高现场抗扰度
三、关键参数（摘要）
- 类别：收发器（差分）
- 通讯模式：半双工
- 驱动器/接收器：1/1
- 供电：3.3V 单电源
- 最高速率：12Mbps
- 节点数：32
- 静态电流：500µA（典型/最大依应用而异）
- ESD：±8kV HBM
- 温度：-40～+85℃
- 封装：SOP-8
四、典型应用场景
- 工业现场总线与PLC通信接口
- 楼宇自控与安防设备的数据收发
- 智能电表与远抄终端（数据集中器侧）
- 串行差分长线通信、RS-485风格网络（半双工拓扑）
五、封装与引脚（SOP-8）
SOP-8小尺寸封装，适合批量生产与自动化贴片。引脚通常包括差分A/B、DE/RE控制、供电与地等标准功能，便于与MCU的UART/IO直连。具体引脚图和功能请参考厂家引脚手册或Datasheet。
六、设计与布局建议
- 差分对走线应成对匹配长度并保持恒定间距，减小共模噪声与串扰。
- 在总线两端采用终端电阻（通常120Ω或依据线阻定值）以减少反射。
- 若系统需要常态偏置（Fail-safe），在无驱动器时通过拉高/拉低电阻保持线路确定电平。
- 对于工业环境，建议在收发器近端加入瞬态抑制器（TVS）或共模电感以增强抗干扰能力。
- 充分利用DE/RE控制实现半双工方向切换，注意切换延时与总线仲裁。
七、选型与注意事项
选型时确认实际速率、节点数与线缆长度匹配；若现场存在更强烈的浪涌或更高静电风险，选择更高ESD等级或做布板与防护增强。SOP-8封装便于成本控制与小体积设计，但在需要更强散热或更高隔离时，考虑替代封装或外部保护方案。
八、总结
MAX3485CSA-JSM是一款面向工业级差分半双工通信的低功耗、高速收发器，适合3.3V微控制器系统与最多32节点的差分总线应用。凭借工业温度范围、较低静态电流及±8kV ESD防护，它在楼宇自动化、工业通信与远程数据采集场景中具有良好的性价比与可靠性。购买与设计时请结合厂方Datasheet完成详细电气与热设计验证。
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