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ADI/LINEAR MAX487CSA+T MAX487CSA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ADI(Analog Devices) / LINEAR MAX487CSA+T
- Type
- ADI/LINEAR
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ADI(Analog Devices) / LINEAR
- Electronic Component
- MAX487CSA+T
- Electronic Component
- 1
- Package
- SOP-8
- Type
- Transceiver
- Electronic Component
- RS-485 / RS-422IC
- Electronic Component
- 0.213g
- Electronic Component
- 128
- Electronic Component
- 1
- Features
- Tx / Rx
- Electronic Component
- BM0264913198
- Operating Temperature
- 0℃~+70℃
- Operating Voltage
- 4.75V~5.25V
- Receiver
- 1
- Data
- 250Kbps
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MAX487CSA+T 产品概述
一、概述
MAX487CSA+T 是 ADI/Linear 系列的低功耗 RS-422/RS-485 半双工收发器，集成 1 个驱动器和 1 个接收器，适用于工业与楼宇控制等差分总线通信场景。器件在 4.75V～5.25V 工作电压下工作，支持最高 250 kbps 的数据速率，并能在最多 128 个节点的总线上稳定通信。工作温度范围为 0℃～+70℃。
二、主要特性
- 单驱动器/单接收器 (1×1) 半双工结构，简单易用。
- 低静态电流：典型静态电流 120 μA，适合低功耗/待机应用。
- 工作电压：4.75V 至 5.25V。
- 数据速率：250 kbps（驱动/接收的可支持速率）。
- Slew‑rate 限制（斜率限制）设计，有效降低电磁干扰 (EMI) 和减少反射。
- 保护功能：热关断保护、过流保护、使能关断（可通过 EN/DE 管脚关闭器件）。
- 封装：SOP-8，便于 PCB 组装与替换。
三、优势与应用场景
- 低功耗特性适合电源受限的远端节点与休眠场景，例如传感器节点、抄表、楼宇自控。
- Slew‑rate 限制减少了线缆辐射与地线干扰，适合需要满足 EMI 要求的工业环境。
- 内置保护提高了总线故障时系统的稳健性，适合现场运行、恶劣电气环境。
- 典型应用：楼宇自动化、工业控制网络、POS 机、安防监控、仪表和远程 I/O。
四、设计与使用建议
- 总线终端阻抗匹配：在总线两端加终端电阻（常见 120 Ω），减少反射，提升信号完整性。
- 控制使能时序：半双工线路在驱动方向切换时需预留足够的驱动/接收切换延迟，避免数据冲突。使用器件的 Tx/Rx 启用管脚（DE/RE/EN）实现方向控制与节电。
- 电源去耦：靠近器件放置 0.1 μF 陶瓷电容以抑制瞬态噪声。
- 保护与接地：考虑增加 TVS、共模扼流圈和差分滤波以提升抗雷击与浪涌能力。注意 PCB 地与差分对的排布，减少环路面积。
- 节点数与负载：器件支持多节点部署（按规格可达 128 节点），但实际节点数受总线拓扑与终端/偏置电阻影响，必要时使用中继或隔离器。
五、封装与环境规范
- 封装形式：SOP-8，兼容常见的 PCB 布局与自动贴装工艺。
- 工作温度：0℃～+70℃，适用于室温及一般工业环境。对更宽温度需求，可查阅同系列的工业级器件或加温控措施。
六、总结
MAX487CSA+T 是一款面向低功耗、抗干扰和现场可靠性要求的 RS-422/RS-485 半双工收发器。其 120 μA 的静态电流、250 kbps 的速度、斜率限制及多项保护功能使其在楼宇自控、工业通信和各种差分总线系统中成为经济且稳健的选择。设计时注意终端匹配、使能时序与电源去耦，可获得最佳性能与稳定性。若需要更严格的温度范围或更高速度，可考虑同厂更高规格型号。
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