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JSMSEMI MAX3485ESA+T-JSM MAX3485ESA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- JSMSEMI MAX3485ESA+T-JSM
- Type
- JSMSEMI
- Minimum package
- 4000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- JSMSEMI
- Electronic Component
- MAX3485ESA+T-JSM
- Electronic Component
- 1
- Package
- SOP-8
- Type
- Transceiver
- Electronic Component
- RS-485 / RS-422IC
- Electronic Component
- 0.115g
- Electronic Component
- 32
- Electronic Component
- 1
- Features
- Tx / Rx
- Electronic Component
- BM0264826828
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 3.3V
- Receiver
- 1
- Data
- 15Mbps
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MAX3485ESA+T-JSM 产品概述
一、概述
MAX3485ESA+T-JSM 是一款低功耗、限摆率的半双工 RS-485/RS-422 收发器，集成 1 路驱动器和 1 路接收器，工作电压 3.3V，支持高达 15 Mbps 的数据速率。器件适用于多点总线系统，最多可连接 32 个节点，工作温度范围为 -40℃ 至 +85℃，静态电流约 500 μA。封装为 SOP-8，品牌为 JSMSEMI（杰盛微），并具备工业级可靠性指标和现场抗扰性要求。
二、主要特点
- 单驱单收，半双工通讯模式，简化总线布线
- 工作电压：3.3V；最高数据速率：15 Mbps
- 支持多达 32 节点的 RS-485 网络拓扑
- 低静态电流：约 500 μA，适合低功耗应用
- 限摆率设计，降低电磁干扰（EMI）并改善信号完整性
- 硬件功能：Tx/Rx 启用（DE/RE 控制）、使能关断（shutdown）
- 保护特性：过流保护、热关断保护、对地及差分线静电保护高达 ±15 kV
- 工业级温度范围：-40℃ ~ +85℃；封装：SOP-8
三、典型应用
- 工业自动化通信总线（PLC、远程 IO）
- 楼宇自控与安防系统（门禁、报警器）
- 仪器仪表和数据采集系统
- 机器人与工厂现场总线接口
- 需要高抗扰和低功耗的串行差分通讯场景
四、设计要点与使用建议
- 终端匹配：长线或高带宽应用建议在总线两端使用 120 Ω 差分终端电阻以减少反射。
- 偏置电阻：若系统中存在空闲总线，建议使用上拉/下拉偏置电阻来保证故障安全（fail-safe）。
- 布线与接地：差分对保持最小回路面积，走线长度、阻抗一致性对 15 Mbps 性能关键；地线应靠近器件引脚以降低回路噪声。
- ESD 与浪涌：器件内部有 ±15 kV 保护，但在恶劣现场建议配合外部 TVS 或浪涌抑制器加强保护。
- 散热与保护：器件具热关断与过流保护，长时间短路或过载会触发保护动作，需设计合适限流与散热措施。
- 使能控制：使用 DE/RE 引脚进行驱动器/接收器的硬件使能与关断，可在空闲或低功耗模式下关闭驱动以节省能源。
五、封装与引脚概要
- 封装：SOP-8，便于自动贴装与批量生产。
- 常见引脚：VCC（3.3V）、GND、A/B（差分收发对）、DI（驱动输入）、RO（接收输出）、DE（驱动使能）、RE（接收使能）。（具体引脚排列请参考器件数据手册）
MAX3485ESA+T-JSM 以其低功耗、限摆率和完善的保护特性，适合工业现场与高抗扰串行通讯应用。在设计中结合合适的终端、电源与防护措施，可获得稳定可靠的差分通信性能。若需电气参数表或参考电路图，请参阅 JSMSEMI 官方数据手册。
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