沁恒推出符合USB2.0协议规范的4端口USB HUB控制器芯片CH334/5，支持端口状态LED指示灯
CH334和CH335是符合USB2.0协议规范的4端口USB HUB控制器芯片，上行端口支持USB2.0高速和全速，下行端口支持USB2.0高速480Mbps、全速12Mbps和低速1.5Mbps。不但支持低成本的STT模式（单个TT分时调度4个下行端口），还支持高性能的MTT模式（4个TT各对应1个端口，并发处理）。
工业级设计，外围精简，可应用于计算机和工控机主板、外设、嵌入式系统等。
特点
4口USB集线器，提供4个USB2.0下行端口，向下兼容USB1.1协议规范
支持各端口独立电源控制或GANG整体联动电源控制
支持各端口独立过流检测或GANG整体过流检测，支持5V耐压过流信号输入
支持高性能的MTT模式，为每个端口提供独立TT实现满带宽并发传输，总带宽是STT的4倍
支持端口状态LED指示灯
可通过外部EEPROM配置是否支持复合设备、不可移除设备、自定义VID、PID和端口配置
内置信息存储器，针对行业特殊需求可批量定制厂商或产品信息及配置，无需EEPROM
自研的专用USB PHY，LPM低功耗技术，相比第一代HUB芯片大幅降低，支持自供电或总线供电
可通过I/0引脚或外部EEPROM配置自供电或总线供电模式
提供晶体振荡器，内置电容，支持外部12MHz输入，内置PLL为USB PHY提供480MHz时钟
内置专业的高精度时钟，可以选择去掉外部12MHz晶体，节省成本、减小体积和降低EMI
上行端口内置1.5KΩ上拉电阻，下行端口内置USB Host主机所需下拉电阻，外围精简
内置LDO线性降压调节器，可将USB总线电源电压转换为芯片的3.3V工作电源
CH335支持MCU控制上行端口与1#下行端口交换
6KV增强ESD性能，Class 3A
工业级温度范围：-40~85℃
提供QFN28、QFN24、QFN16、QFN12、SOP16、QSOP28等多种封装形式
封装
注：0#引脚是指QFN封装的底板。
优选CH334P和CH335J，体积小；CH335引脚全；
其它封装形式侧重于PCB兼容；新设计不建议选择CH334S/H/Q/L；CH334L仅批量预订。
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本文由ll转载自沁恒，原文标题为:USB HUB控制器芯片 CH334/5实现集线器方案，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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沁恒（WCH）通讯接口芯片和全栈MCU选型指南
描述- 南京沁恒微电子股份有限公司专注于连接技术和微处理器内核研究,是一家基于自研专业接口IP、微处理器内核IP构建芯片的集成电路设计企业。公司致力于为客户提供万物互联、上下互通的芯片及解决方案，主要产品包括USB/蓝牙/以太网接口芯片和连接型/互联型/无线型MCU，产品侧重于连接联网和控制。
型号- CH24X,CH233P,CH36X,CH32X035F8U6,CH32X035G8R6,CH32V103C6T6,CH32F205RBT6,CH370,CH372,CH251,CH343G,CH374,CH132,CH253,CH252,CH376,CH343K,CH375,CH254,CH32V006F8P6,CH378,CH377,CH440G,CH32X035,CH25X,CH32V208WBU6,CH583M,CH341T,CH32V003J4M6,CH32F103C6T6,CH233A,CH342F,CH382,CH32V006E8R6,CH384,CH342K,CH233K,CH37X,CH9374B,CH237,CH236,CH58X,CH32F103C8U6,CH340K,CH231K,CH22X,CH238,CH34X,CH340N,CH582M,CH340T,NET-SER-DT TTL,CH341B,CH341A,CH592,CH341F,CH591,CH231,CH486F,CH230,CH233,CH235,CH35X,CH32X035F7P6,CH368,CH484M,CH230K,CH23X,CH231A,CH32V203G6U6,CH340E,CH582F,CH482,CH481,CH340C,CH484,CH340B,CH483,CH365,CH486,CH364,CH340G,CH246,CH367,CH59X,CH4XX,CH366,CH578,CH334R,CH457,CH577,CH32V303VCT6,CH335,CH334Q,CH456,CH334P,CH338,CH579,CH32V,CH56X,CH334U,CH339,CH32X,CH564Q,CH334S,CH32V003A4M6,CH32X033F8P6,CH32F,CH335F,CH347F,CH32M,CH335J,CH32L,CH565M,CH451,CH571,CH450,CH444G,CH238P,CH453,CH573,CH452,CH334,CH455,CH454,CH347,CH226,CH57X,CH225,CH348,CH32X035G8U6,CH237D,CH9342G,CH334F,CH581,CH583,CH564L,CH334H,CH341,CH220,CH462,CH582,CH32F208WBU6,CH340,CH32X035R8T6,CH564F,CH343,CH342,CH221,CH463,CH334L,CH345,CH224,CH443K,CH344,CH223,CH344Q,CH555,CH557,CH315,CH318,CH54X,CH559,CH317,CH438,NET-485-9120,CH235S,CH32V002系列,CH32M007,CH236D,CH442E,CH552,CH551,CH554,CH432,CH567,CH343P,CH446,CH445,CH569,CH55X,CH448,CH568,CH440R,CH31X,CH449,CH440P,CH9340K,CH9340C,CH32F207VCT6,CH561,CH440,CH563,CH442,CH344L,CH565,CH323,CH444,CH564,CH443,CH412,CH64X,CH338X,CH52X,CH32V103R8T6,CH448F,CH32V203F8U6,CH9103M,CH32V203G8R6,CH532,CH531,CH545,CH423,CH547,CH546,CH446Q,CH53X,CH549,CH446X,CH548,CH32F103R8T6,BLE-DONGLE,CH338F,CH9104L,CH338L,CH541,CH543,CH422,CH32V003F4P6,CH9101Y,CH445P,CH9101N,CH9101R,CH9101U,CH9101H,CH32V307RCT6,CH347T,CH643,CH522,CH9102X,CH525,CH444P,CH645,CH524,CH527,CH528,CH565W,CH9344L,CH348L,BLE-SER-A-ANT,CH348Q,CH32V203F6P6,CH521,CH641,CH9102F,CH645W,CH32F203CBT6,CH32V006K8U6,CH32F207,CH32F205,CH32F203,CH32V003F4U6,CH32F208,CH645F,BLE2U-C-ANT,CH643U,CH643W,CH643Q,CH449X,CH32V303CBT6,CH32L103F8U6,CH32V305FBP6,CH569W,CH32F103,CH449F,CH32L103G8R6,CH643L,CH32X035系列,CH32F203C8T6,CH32V208RBT6,CH32V203系列,CH32V305RBT6,CH32V007系列,NET-232-9120,CH32V208GBU6,CH32L103F8P6,CH32V203C8T6,CH32V307,CH32V305,CH32F203C8U6,CH32V203C8U6,CH32V303,CH9160-DG-R0,BLE-TPT-A-ANT,CH32F203C6T6,BLE2U-A-ANT,CH9343,NET-TTL-9120,CH9328,CH9329,CH9326,CH9445,CH32L103C8T6,CH32F208RBT6,CH32F203VCT6,CH32V005F6U6,CH182H,CH182F,CH32V305GBU6,CH9434,CH32V203C6T6,CH32V307VCT6,CH181H,CH32L103系列,CH32V203F8P6,BLE-TPT-B-ANT,CH32V005D6U6,CH912X,CH32V303RCT6,CH32V005E6R6,CH32V003系列,CH32F203K8T6,NET-SER-DT RS232,CH9143,CH93XX,CH9140,CH9142,CH9141,CH9126,CH32V005F6P6,CH32F203RCT6,NET-SER-DT RS485,CH32L103,CH32V006,CH32V007,CH32V005,CH32V002,CH32V003,CH32X035C8T6,CH32V303RBT6,CH32V203K8T6,CH9121,CH9120,CH32V307WCU6,CH32V303系列,CH32F203RBT6,CH32V203RBT6,CH9350,CH483M,CH32V103C8T6,CH32V005系列,CH592X,CH483X,CH32M系列,CH230A,CH32V317,CH581F,CH32F103C8T6,CH32V103C8U6,CH482X,CH32L103K8U6,CH591R,CH32V208,CH182,CH592F,CH32V103系列,CH32V203,CH592D,CH32V208CBU6,CH914X,CH390,CH32V203K6T6,CH392,CH271,CH591D,CH482D,CH591F,CH275,CH395,CH397,CH38X,BLE232-NEP,CH32V006F8U6,CH32V103,CH39X,CH481D
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提供蓝牙BLE芯片协议、蓝牙模块、蓝牙成品测试认证服务；测试内容分Host主机层，Controller控制器层，Profile应用层测试。支持到场/视频直播测试，资深专家全程指导。
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可定制板装式压力传感器支持产品量程从5inch水柱到100 psi气压；数字输出压力传感器压力范围0.5~60inH2O，温度补偿范围-20~85ºС；模拟和数字低压传感器可以直接与微控制器通信，具备多种小型SIP和DIP封装可选择。
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