WMSIC Electronic Components

WCH CH395F

ModelCH395F
PackageQFN-32(4x4)
BrandWCH
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 26+

Availability on request

Technical data

Product details

19 specifications

Core information

Product name
WCH CH395F
Type
WCH
Minimum package
490 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
WCH
Electronic Component
CH395F
Electronic Component
1
Package
QFN-32(4x4)
Electronic Component
Ethernet Controller
Electronic Component
0.82g
Electronic Component
1
Integrated PHY
Electronic Component
Features
Programmable LED; Low Power; positions
Electronic Component
BM0265560699
Electronic Component
24KB
Operating Voltage
1.8V;3.3V;2.5V
Communication Interface
SPI
Electronic Component
Electronic Component
Electronic Component
490

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

CH395F 以太网控制芯片产品概述

一、品牌与核心定位

南京沁恒微电子(WCH)推出的CH395F是一款专为嵌入式系统设计的低资源MCU以太网扩展芯片,针对传统8位/16位MCU缺乏以太网功能的痛点,提供集成化的网络接入解决方案。该芯片无需外接专用PHY器件,凭借小体积、多接口、宽电压的特性,广泛适配智能家居、工业控制、物联网终端等场景的网络升级需求,降低系统设计复杂度与成本。

二、基础参数与核心特性

CH395F的参数覆盖嵌入式系统的关键需求,核心特性包括:

  • 电源适应性:支持1.8V、2.5V、3.3V三种工作电压,兼容主流MCU(如STM32低功耗系列、51单片机、ATmega系列)的电源系统,无需额外电平转换电路;
  • 集成存储:内置24KB RAM作为数据缓存,可满足以太网收发过程中的数据暂存需求,避免因缓存不足导致的丢包,适合短帧或突发数据传输;
  • 封装规格:采用QFN-32(4×4mm)小型化封装,引脚间距0.8mm,适合贴片生产,能有效节省PCB空间,适配紧凑型产品设计(如智能门锁、传感器节点)。

三、多接口兼容设计

CH395F提供三种主流通信接口,方便不同MCU快速对接:

  1. SPI接口:采用从模式,主流MCU作为主设备即可连接,传输速率可灵活配置(最高支持数Mbps级别),适合资源有限的8位MCU扩展以太网;
  2. 串口(UART):支持标准RS232/RS485协议(需外接MAX3232等电平转换芯片),波特率范围宽(1200bps~1Mbps以上),兼容传统串口设备的以太网升级(如老旧工业仪表);
  3. 并口:8位并行数据接口,部分场景下(如高速数据采集)比串行接口传输效率更高,适合对传输速度有要求的工业应用。

四、集成PHY与以太网支持

CH395F内置10/100M自适应以太网PHY,无需外接独立PHY芯片,进一步简化系统设计:

  • 速率兼容:支持10BASE-T(10M以太网)和100BASE-TX(100M快速以太网),自动协商网络速率与双工模式(半双工/全双工),适配不同网络环境;
  • 布线简化:支持MDI/MDIX自动翻转,无需区分直连网线(PC→交换机)或交叉网线(PC→PC),减少布线错误;
  • 抗干扰性:PHY集成信号调理电路,适应工业环境的电磁干扰,可稳定工作在户外或复杂工业现场。

五、典型应用场景

CH395F凭借紧凑设计与多接口特性,适用于以下场景:

  • 智能家居终端:智能网关、网络摄像头、智能门锁等,小体积封装适配设备内部空间,多接口兼容MCU与传感器;
  • 工业控制模块:PLC扩展模块、传感器节点、远程IO设备,宽电压与抗干扰PHY适合工业现场;
  • 消费电子升级:老旧机顶盒、智能电视的网络扩展,串口/SPI接口方便对接现有硬件;
  • 物联网终端:低功耗MCU(如1.8V供电的STM32L系列)的联网方案,集成PHY省去额外器件。

六、设计优势总结

CH395F的核心优势在于**“小体积+高集成+易对接”**:集成PHY省去外接器件,多接口覆盖不同MCU,宽电压适配各类系统,QFN-32封装节省空间,让嵌入式系统的以太网接入变得简单高效,是传统MCU升级网络功能的理想选择。

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