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WCH CH9101R
Configuration
1 options
Configuration
Option 175479
Availability on request
Technical data
Product details
19
specifications
Core information
- Product name
- WCH CH9101R
- Type
- WCH
- Minimum package
- 100 未知
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- WCH
- Electronic Component
- CH9101R
- Electronic Component
- 1
- Package
- QSOP-16-150mil
- Electronic Component
- USB Converter IC
- Electronic Component
- 0.4g
- Electronic Component
- 1
- Features
- Programmable;; Built-in Clock Generator;; Low Power; positions
- Electronic Component
- BM0264744748
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 3.3V；5V
- Operating Current
- 15mA
- Electronic Component
- USB UART
- Data
- 3Mbps
- Static Current
- 160uA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
CH9101R USB转UART桥接芯片产品概述
一、核心功能与应用场景
CH9101R是南京沁恒微电子（WCH）推出的USB 2.0转UART串口桥接芯片，核心作用是实现USB接口与UART串口的双向数据转换，解决传统UART设备无法直接连接电脑USB端口的问题。
典型应用场景
- 嵌入式系统调试：单片机（51、STM32、AVR等）开发中，通过CH9101R将芯片UART与PC USB连接，实现程序下载、串口日志查看、参数配置；
- 工业数据采集：工业传感器（温度、压力）、PLC扩展模块的UART输出，经转换后上传至上位机或边缘网关；
- 消费电子调试：智能音箱、路由器、智能家居控制器的内部调试接口，方便固件升级与故障排查；
- 移动便携设备：低功耗特性适配电池供电的手持终端、数据记录仪，实现USB与串口的低功耗通信。
二、关键参数与性能特性
CH9101R兼顾高速传输、低功耗、宽电压适配，核心参数如下：
参数类别 具体参数 说明 USB协议版本 USB 2.0 Full Speed 兼容USB 1.1设备，符合主流接口规范 UART速率 最高3Mbps 覆盖9600bps~3Mbps宽范围，满足高速传输 工作电压 3.3V/5V（宽电压3.0~5.5V） 兼容嵌入式系统常见电源电压 工作电流 动态15mA（典型值） 低功耗，适合电池设备 静态电流 160uA（典型值） 休眠状态下功耗极低 工作温度 -40℃~+85℃ 工业级温度，适应户外/车载等恶劣环境额外性能优势
- 内置晶体：无需外部石英晶体，减少BOM成本与PCB空间；
- 流控支持：同时兼容硬件流控（RTS/CTS）与软件流控（XON/XOFF），确保大数据量传输稳定；
- 电平适配：UART接口自动识别5V/3.3V逻辑电平，无需额外电平转换电路；
- OS兼容：支持Windows（XP~11）、Linux、MacOS、Android，提供完善驱动。
三、封装与应用优势
CH9101R采用小体积封装，常见形式为：
- SOP-16（150mil）：表面贴装，适配大多数PCB设计；
- QFN-16（3x3mm）：超小封装，适合便携设备的体积限制。
核心应用优势
- 集成度高：内置USB收发器、晶体振荡器，仅需少量电容即可工作，简化电路设计；
- 成本可控：相比进口同类芯片（如FT232），性价比突出，适合量产；
- 稳定性强：工业级温度与低功耗，在 harsh环境下仍稳定工作；
- 技术支持完善：沁恒提供详细手册、驱动与国内快速响应的技术支持。
四、典型电路设计要点
以嵌入式调试接口为例，设计需注意：
- 电源滤波：VCC引脚接0.1uF陶瓷电容+10uF电解电容（靠近芯片），滤除噪声；
- UART连接：TX/RX直接连单片机UART，需流控则接RTS/CTS；
- USB规范：D+/D-引脚接15Ω电阻，符合USB电气要求；
- 低功耗控制：通过SUSPEND引脚进入休眠，进一步降低静态电流。
五、总结
CH9101R凭借高速、低功耗、宽电压、工业级温度等特性，成为嵌入式、工业控制、消费电子领域的常用选择。其高集成度与低BOM成本，使其在量产项目中具备强竞争力。对于需要USB-UART双向通信的场景，是一款性价比突出的解决方案。
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