【应用】USB转4串口控制芯片CH9344L用于Cat.1芯片模组，可同时实现四路串口通信

时间： 2023-06-15 来源：世强

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在物联网日益发展的今天，LTE Cat.1无线通信模组迅速成为了物联网领域的“网红“，该芯片模组支持高达5Mbps的上行速率和10Mbps的下行速率，从而能够以更低的功耗和更低的成本使IOT设备连接到LTE网络。主要用于中速蜂窝通信行业中，包括车载定位、可穿戴设备、共享设备、视频监控、电力集中抄表等领域。

某客户就是研发生产Cat.1芯片模组的，其主要为中国移动做方案。Cat.1芯片模组可以依托现有的4G网络，可以实现良好的网络覆盖，能够有效的规避2/3G退网带来的风险，所以说Cat.1芯片模组在如今的市场中有着非常大的市场潜力。客户方案主要是做一个cat1芯片模组，现在在设计其外面的开发板电路，开发板电路根据客户要求，有简洁版的只是一个供电电路，加一些常用的烧录口（USB）以及指示灯，其他的有预留排针客户可根据需求进行设计。因为芯片有多路串口，调试中需要同时与几路串口进行通信，之前用1路USB转2路串口，在实际使用中不够用，所以客户目前需要对产品进行升级方案。

图1：CH9344L简化应用图

根据客户方案升级需要，客户之前采用了两个USB转双串口的芯片，所以向客户推荐了沁恒的CH9344L，这是一款USB转4串口控制芯片，可以满足客户调试芯片时与多路串口同时通信，既节约了空间又节省了成本，对于客户的方案升级来说是最优的选择。

CH9344L这款芯片提供4组全双工的异步串口UART0/1/2/3，支持115200bps以及最高达12Mbps的通讯波特率，高传输速率为客户的产品设计带来了优化。

其次，芯片提供12个GPIO，可任意输入、输出，并且串口0/1/2及部分I/O独立供电，支持3.3V和2.5V及1.8V电源电压，供电电压通用，方便设计。该芯片封装为LQFP-48无铅封装，大大节约了客户模块的体积。

综上所述，为客户所推荐的这款沁恒的USB转4串口控制芯片CH9344L能够为客户设计带来很多的优化，减小了PCB板占用空间，降低了成本，客户实测参数性能也比较优越。

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本文由郝祥弘提供，版权归世强硬创平台所有，非经授权，任何媒体、网站或个人不得转载，授权转载时须注明“来源：世强硬创平台”。

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沁恒（WCH）通讯接口芯片和全栈MCU选型指南

目录- 企业简介接口转换产品 MCU产品选型 USB转串口产品选型低功耗蓝牙系列单片机系列网络系列 USB系列 USB PD协议系列 PCI/PCIE 系列显示驱动及键盘扫描系列单片机外围系列产品方案

型号- CH32V103C6T6,CH32F205RBT6,CH343G,CH32F203C8T6,CH343K,CH573F,CH378,CH440G,CH571K,CH32V208WBU6,CH583M,CH32V208RBT6,CH341T,CH32F103C6T6,CH32V305RBT6,CH342F,CH384,CH342K,CH32F103C8U6,CH340K,CH582M,CH340N,CH340T,CH32V208GBU6,CH341B,CH341A,CH571F,CH341F,CH32V203C8T6,CH486F,CH571D,CH368,CH484M,CH32V307,CH582F,CH340E,CH482,CH32F203C8U6,CH32V305,CH481,CH32V203C8U6,CH340C,CH484,CH32V303,CH483,CH486,CH340G,CH246,CH578,CH457,CH32V303VCT6,CH577,CH335,CH456,CH552T,CH579,CH552P,CH577F,CH32F203C6T6,CH9344,CH451,CH450,CH444G,CH453,CH452,CH334,CH455,CH454,CH9328,CH348,CH9329,CH224P,CH9326,CH34B,CH9342G,CH32F208RBT6,CH581,CH583,CH341,CH462,CH32F203VCT6,CH32F208WBU6,CH582,CH340,CH552E,CH343,CH342,CH463,CH552G,CH345,CH224,CH443K,CH344,CH556,CH555,CH558,CH557,CH559,CH317,CH438,CH224D,CH32V203C6T6,CH442E,CH552,CH551,CH554,CH224K,CH551G,CH343P,CH567,CH446,CH445,CH569,CH448,CH568,CH440R,CH449,CH440P,CH573X,CH9340K,CH9340C,CH32F207VCT6,CH440,CH442,CH344L,CH565,CH444,CH443,CH32V303RCT6,CH32V103R8T6,CH448F,CH9103M,CH9143,CH557Q,CH9140,CH532,CH9142,CH545L,CH531,CH9141,CH545,CH544,CH423,CH547,CH546,CH549,CH548,CH32F103R8T6,CH32F203RCT6,CH541,CH540,CH543,CH422,CH542,CH554T,CH445P,CH554P,CH32V303RBT6,CH9101U,CH579F,CH9101H,CH32V307RCT6,CH32V203K8T6,CH555L,CH9121,CH9120,CH579M,CH522,CH9102X,CH525,CH444P,CH524,CH527,CH528,CH578F,CH554E,CH9344L,CH578M,CH348L,CH554G,CH348Q,CH521,CH9102F,CH9350,CH483M,CH32F203CBT6,CH32V103C8T6,CH483X,CH549L,CH549F,CH549G,CH581F,CH32F103C8T6,CH32F207,CH32F205,CH559T,CH32F203,CH32V103C8U8,CH482X,CH32F208,CH548G,CH32V208,CH548L,CH32V203,CH548N,CH32V208CBU6,CH558T,CH32V303CBT6,CH547G,CH392,CH547F,CH482D,CH395,CH559L,CH547L,CH397,CH32F103,CH546G,CH32V103,CH558L,CH546L,CH481D

2022/01 - 沁恒 - 选型指南代理服务技术支持现货查询批量订货

沁恒（WCH）USB转串口芯片选型表

描述- 南京沁恒微电子股份有限公司成立于2004年，是一家通讯接口芯片和全栈 MCU 芯片公司。沁恒专注于连接技术和 MCU 内核研究，基于自研收发器 PHY 和处理器 IP 的全栈研发模式，取代传统的外购 IP 整合模式，提供以太网、蓝牙无线、 USB 和 PCI 类等接口芯片，及集成上述接口的连接型互联型／无线型全栈 MCU ＋单片机。

型号- CH344Q,CH340K,CH340N,CH340T,CH9101U,CH9101H,CH341B,CH341A,CH9103M,CH341F,CH343G,CH9143,CH343K,CH343P,CH347,CH9102X,CH9326,CH9340K,CH341T,CH9340C,CH9342G,CH9344L,CH340E,CH342F,CH348L,CH340C,CH340B,CH342K,CH348Q,CH344L,CH340G,CH9102F

沁恒 - 选型指南代理服务技术支持现货查询批量订货

【产品】具有高速USB 2.0接口的USB转4串口控制芯片CH9344，支持至多12路GPIO输入输出

沁恒CH9344 USB转4串口控制芯片，提供4组全双工异步串口UART0/1/2/3，工作电压3.3V。高速USB 2.0接口，外围元器件只需晶体和电容。兼容16C550异步串口并有所增强。

2022-09-08 - 产品代理服务技术支持现货查询批量订货

USB 转 4 串口芯片 CH9344手册

型号- CH9344L,CH9344,CH9344Q

2024/6/20 - 沁恒 - 数据手册 - 版本：1D 代理服务技术支持现货查询批量订货

沁恒USB转多串口芯片选型表

沁恒USB转多串口芯片选型表提供USB高速/全速转串口系列芯片，可实现USB转1/2/4/8路串口，支持串口I/O独立供电，支持VCP/HID/CDC/AOA转串口，VCP串口支持硬件流控和高波特率大数据连续传输，部分型号支持VID/PID/String等内容配置，支持Windows/Linux/Android/macOS等操作系统。

RTS/CTS/DTR JTAG/SWD/SPI/I2C/GPIO*8

-40~+85℃

QFN28

高速USB+多接口

选型表 - 沁恒立即选型

【视频】沁恒工业级-40℃~+85℃的高速率USB转单/多串口芯片，满足兼容CH910X系列

型号- CH340K,CH340N,CH340T,CH9101U,CH9101H,CH341B,CH341A,CH9103M,CH341F,CH343G,CH9143,CH343K,CH334,CH343P,CH9102X,CH9326,CH9340K,CH341T,CH9340C,CH9342G,CH9344L,CH340E,CH342F,CH348L,CH340C,CH340B,CH342K,CH348Q,CH344L,CH340G,CH9102F

沁恒 - 商品及供应商介绍代理服务技术支持现货查询批量订货