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GATEMODE GM1794E
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- GATEMODE GM1794E
- Type
- GATEMODE
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- GATEMODE
- Electronic Component
- GM1794E
- Electronic Component
- 1
- Package
- SOP-8
- Type
- Transceiver
- Electronic Component
- RS-485 / RS-422IC
- Electronic Component
- 0.307g
- Electronic Component
- 256
- Electronic Component
- 1
- Features
- Low Power
- Electronic Component
- BM0264339540
- Operating Temperature
- 40℃~+125℃
- Operating Voltage
- 4.5V~5.5V
- Receiver
- 1
- Data
- 1Mbps
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
GM1794E 产品概述
GM1794E 是捷茂微（GATEMODE）推出的一款高可靠性的 RS-485 半双工收发器，集成电缆反向保护与 ±70V 故障耐受能力，适用于恶劣工业环境下的长线差分通信场景。器件采用 SOP-8 封装，提供单驱动器、单接收器通道，专为高密度、多节点网络设计。
一、主要功能与特点
- 工作电压：4.5V ～ 5.5V，与常见 5V 工业系统兼容。
- 数据速率：支持最高 1 Mbps 的差分通信。
- 节点数：单总线最大支持 256 个节点，适合大规模节点拓扑。
- 低功耗：静态电流仅 500 μA，具备低功耗待机模式。
- 通讯模式：半双工，带驱动使能控制（DE）与接收使能控制（/RE）。
- 热插拔保护：上电/热插拔时限制浪涌电流并保护线路设备。
- 失效保护：内置失效模式保证总线在开路、短路或驱动器断电时处于安全状态（fail-safe）。
- 静电与瞬变保护：静电保护等级 ±16 kV（HBM），并能承受 ±70V 电缆反向或故障电压。
二、保护与可靠性设计
GM1794E 重点针对现场布线常见故障进行了设计优化：
- ±70V 故障保护可应对接线反接、大电流干扰或其它意外高压事件，避免器件损毁。
- 热插拔保护使得模块在插拔过程中对母线和驱动器提供过流/过压抑制，提升维护可靠性。
- 失效保护确保在总线空闲、双端断开或半导体失效时输出处于可识别的安全状态，减少错误传输与系统误动。
三、电气与外设建议
- 推荐总线终端电阻：120 Ω 差分终端电阻；在长线两端使用终端网络以抑制反射。
- 建议在 VCC 与 GND 之间并联 0.1 μF 陶瓷去耦电容，靠近封装引脚放置。
- 在有强干扰或长线环境下，配合共模滤波、PTC 或浪涌抑制器件可进一步提高系统鲁棒性。
- 使用标准驱动/接收使能逻辑以实现半双工方向控制，支持主/从或多主拓扑应用。
四、典型应用场景
- 工业自动化现场总线、PLC 与远程 IO 通信。
- 建筑自控与安防系统中的长距离差分信号传输。
- 电力与能源监控、计量设备数据汇集。
- 交通与楼宇控制系统，需耐受强干扰与电缆事故的场合。
五、封装与采购
- 封装形式：SOP-8，便于 PCB 布局与批量生产。
- 品牌：GATEMODE（捷茂微），面向工业级可靠性设计。
GM1794E 以其强劲的故障耐受能力、低功耗与工业温域（-40℃ 到 +125℃）运行能力，为要求高可靠性、长线和高节点数 RS-485 网络提供了稳健的收发解决方案。
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