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WCH CH390D
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- WCH CH390D
- Type
- WCH
- Minimum package
- 5000 未知
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- WCH
- Electronic Component
- CH390D
- Electronic Component
- 1
- Package
- QFN-20(3x3)
- Electronic Component
- Ethernet Controller
- Electronic Component
- 0.335g
- Electronic Component
- 1
- Integrated PHY
- Electronic Component
- Features
- Programmable LED; Low Power
- Electronic Component
- BM0238784736
- Electronic Component
- 16KB
- Operating Voltage
- 3.3V
- Data
- 10Mbit/s；100Mbit/s
- Communication Interface
- SPI
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
CH390D 产品概述
一、概述
CH390D 是南京沁恒（WCH）推出的一款以太网控制器芯片，工作电压为 3.3V，封装为 QFN-20 (3x3)。器件内部集成以太网物理层（PHY），并通过 SPI 接口与主控器件通信，内部提供约 16KB 的存储空间用于报文缓冲或控制数据。芯片兼容 10BASE-T 与 100BASE-TX 标准，支持 10Mbit/s 和 100Mbit/s 的数据传输速率，适合对成本、PCB 面积及系统复杂度有严格控制的嵌入式以太网应用。
二、主要特性
- 工作电压：3.3V 标准供电，便于与常见 MCU/MPU 配合；
- 集成 PHY：简化前端电路设计，降低外部器件数量与布线复杂度；
- 通信接口：SPI（主从模式），适配大多数微控制器的外设接口；
- 存储空间：16KB，满足一般报文缓冲与协议栈配合使用；
- 支持标准：10BASE-T 与 100BASE-TX，兼容 10/100M 以太网链路；
- 封装：QFN-20 (3x3)，小尺寸利于空间受限的终端产品。
三、典型应用场景
- 工业控制与数据采集终端：需可靠以太网连接且对体积、成本敏感的产品；
- 智能家居网关与边缘节点：与低功耗 MCU 配合做网络接入；
- 小型网络设备：轻量级交换或网关功能的外围控制模块；
- 嵌入式信息终端：如智能仪表、打印设备、门禁系统等。
四、设计要点与建议
- 电源与去耦：3.3V 电源需具备良好滤波与稳压，芯片供电端附近放置充足的去耦电容（参照器件手册推荐值）；
- PCB 布局：PHY 部分与差分信号线需要短且成对走线，注意回流路径与地平面完整性，减少共模干扰；
- SPI 接口：根据主控器件能力选择合适的时钟频率，遵循器件时序约束以保证稳定传输；
- 以太网前端：虽然芯片集成 PHY，但仍需根据系统需要考虑 RJ45 防护（浪涌、ESD）与磁性元件配置，遵循厂商参考设计；
- 固件与调试：利用内部 16KB 缓冲时注意报文分片与重传策略，调试阶段可结合示例代码与评估板快速验证链路稳定性。
五、封装与选型注意
QFN-20 (3x3) 的小型封装便于高密度布局，但对焊接工艺及热管理提出要求。选型时应参考 WCH 官方数据手册，确认引脚定义、外部器件清单（BOM）及推荐 PCB 尺寸与接地处理策略，以保证量产一致性与可靠性。
总结：CH390D 面向需要 10/100M 以太网接入且追求体积与成本优化的嵌入式应用，集成 PHY 与 SPI 外围接口的组合使其易于与主控器件集成。项目开发前建议详细阅读厂商资料并按参考设计进行布局与防护设计。
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