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GR RS485
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- GR RS485
- Type
- GR
- Minimum package
- 4000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- GR
- Electronic Component
- RS485
- Electronic Component
- 1
- Package
- SOP-8
- Type
- Transceiver
- Electronic Component
- RS-485 / RS-422IC
- Electronic Component
- 0.414g
- Electronic Component
- 256
- Electronic Component
- 1
- Features
- Tx / Rx
- Electronic Component
- BM0263546183
- Operating Voltage
- 5V
- Receiver
- 1
- Data
- 2.5Mbps
- Communication
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
GR（国睿）RS-485/RS-422 收发器（SOP-8）产品概述
一、产品概述
GR 系列 RS-485 收发器为单驱动器/单接收器（1Tx/1Rx）低功耗芯片，适用于 RS-485 与 RS-422 总线通信。器件在单一 5V 电源下工作，设计为半双工通信，驱动器具备高摆率性能，可支持最高 2.5 Mbps 的数据传输速率，并能在多节点总线（最多 256 节点）环境中可靠工作。封装为工业常用的 SOP-8，便于版级兼容与量产。
二、主要技术参数
- 类型：收发器（1 驱动 / 1 接收）
- 工作电压：5V 单电源
- 最大数据速率：2.5 Mbps
- 总线节点数：最多 256 节点
- 静态电流：1.2 mA（典型值）
- 静电保护：±4 kV（接触/空气放电）
- 通讯模式：半双工
- 封装：SOP-8
- 品牌：GR（国睿）
三、功能特点
- Tx/Rx 启用：提供驱动使能（DE）和接收使能（RE）管脚，支持对发送和接收功能的独立控制，实现灵活的主从调度与多主系统管理。
- 热关断保护：当器件过热时，内部热关断电路将驱动输出置为高阻态，以防止过度功耗或器件损坏。
- 过流保护：驱动器具备短路电流限制功能，发生总线短路或冲突时限制电流，降低系统损害风险。
- 失效保护（Failsafe）：接收器输入具有失效保护特性，当差分输入开路或处于同相电位时，接收端能保证输出处于逻辑高电平，避免悬浮引起的误判。
- 低功耗设计：静态电流低，可在待机或低活动场景减少系统能耗。
- 抗静电能力：对常见静电冲击具有良好防护，提升现场可靠性。
四、典型应用
- 工业现场总线、PLC 通信接口
- 楼宇自动化、安防系统数据传输
- 数据采集与传感器网络
- 电力与能源管理系统（如电表、逆变器）
- POS 与票务终端等需要长线差分通信的场合
五、封装与接口说明
SOP-8 封装提供紧凑尺寸及良好散热特性，封装引脚包含电源、差分 A/B、DE/RE 控制、接收器输出等常规引脚。DE 与 RE 管脚用于驱动/接收切换控制；热关断或过流动作时，驱动器输出将被置为高阻，以便总线恢复或外部保护动作触发处理。
六、设计建议与注意事项
- 总线终端：长线或高速场合应在两端加 120Ω 终端电阻并适当配置偏置电阻，确保总线稳定。
- DE/RE 控制：设计时应合理安排 DE/RE 的逻辑控制以避免总线驱动冲突，必要时采用硬件仲裁或延时控制。
- 电源与去耦：靠近器件放置 0.1 μF 陶瓷去耦电容并尽量缩短走线，提升抗干扰性能。
- 布线与差分对：差分对应成对走线并保持阻抗一致，避免交叉干扰与不必要的回路面积。
- 环境适配：在高噪声或高温场合，考虑增加外部 TVS 和良好散热措施，配合器件的热关断与过流保护实现更高可靠性。
本器件以稳健的过流与热保护、失效保护与低功耗特性，适合工业级通信环境，能在复杂总线拓扑中提供可靠的差分数据传输解决方案。
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