WMSIC Electronic Components

WCH CH343K

ModelCH343K
PackageESSOP-10-150mil-1mm
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+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
WCH CH343K
Type
WCH
Minimum package
4000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
WCH
Electronic Component
CH343K
Electronic Component
1
Package
ESSOP-10-150mil-1mm
Electronic Component
USB Converter IC
Electronic Component
0.468g
Electronic Component
1
Features
Programmable;; Built-in Clock Generator;; Low Power; positions
Electronic Component
BM0229919185
Operating Voltage
1.8V~5V;3.3V;5V
Operating Current
15mA
Electronic Component
USB UART
Data
6Mbps
Static Current
50uA
USB
USB 2.0

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

CH343K 产品概述

一、产品简介

CH343K 是南京沁恒(WCH)推出的一款USB转UART功能芯片,支持 USB 2.0 协议,面向嵌入式系统与外设连接的串口扩展需求。芯片工作电压范围宽(1.8V~5V),提供 3.3V 与 5V 两种常用电平适配方案,适合直接驱动不同电平的单片机与外设。器件封装为 ESSOP-10-150mil-1mm,体积小、易于电路板布局。

二、主要特点

  • USB 协议:USB 2.0 兼容
  • 功能定位:USB 转 UART(虚拟串口通信可配合厂商驱动实现)
  • 电源范围:1.8V~5V(常见应用以 3.3V 或 5V 供电)
  • 数据速率:最高可达 6 Mbps,满足高速串口通信需求
  • 功耗:工作电流典型值约 15 mA,静态待机电流低至 50 μA
  • 封装:ESSOP-10-150mil-1mm,适合紧凑型模块与板载方案

三、电气性能要点

芯片在提供高速数据传输能力的同时保持低功耗特性。典型工作电流约 15 mA,系统空闲或睡眠时静态电流非常低(约 50 μA),适合电池供电或低功耗设计。灵活的电源电压范围使其可与 1.8V、2.5V、3.3V 或 5V 逻辑直接接口(选型时以具体版本和板上电平匹配为准)。

四、引脚与封装概览

CH343K 为 10 引脚 ESSOP 小封装(150 mil、1 mm 引脚间距规格),典型引脚包括 USB D+/D-、电源(VCC)、地(GND)、UART TX/RX 及若干控制/功能引脚(如 RTS/CTS 或配置引脚)。封装尺寸适合板载直插或模块化封装,便于在空间受限的设计中使用。

五、典型应用建议

  • 在电源引脚附近布置 0.1 μF 与 1 μF 陶瓷去耦电容以抑制瞬态噪声;
  • USB 数据线建议加 ESD 抑制器和差分阻抗匹配网络,保证信号完整性;
  • 若需与 5V MCU 接口,确认芯片 IO 电平或采用电平转换器以保障可靠通信;
  • 开发时参考厂商驱动与应用笔记,快速实现虚拟串口在主流操作系统上的兼容。

六、典型应用场景

  • 嵌入式调试串口桥接(PC 与 MCU 之间)
  • 工业控制器与外设的 USB 接口扩展
  • 消费类电子产品的固件升级与日志导出
  • 需低功耗、高速串口通信的便携设备

七、设计与选型注意事项

选型时务必核对目标系统的供电电压、IO 电平与封装尺寸;若对驱动兼容性或高级信号控制有要求,请查阅 WCH 官方数据手册与驱动支持说明。实际系统中建议做 EMC/ESD 保护与电源滤波设计,以确保长期稳定可靠运行。

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