WMSIC Electronic Components

WCH CH334P

ModelCH334P
PackageQFN-16(3x3)
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 CH334P
Type
WCH
Minimum package
5000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
WCH
Electronic Component
CH334P
Electronic Component
1
Package
QFN-16(3x3)
Type
Electronic Component
Electronic Component
USB Hub
Electronic Component
0.112g
Electronic Component
1
Channel Count
4
Features
Regulator; Power Supply Switch; ESD; Low Power; positions
Electronic Component
BM0228551638
Operating Temperature
40℃~+85℃
Operating Voltage
3.3V
Operating Current
85mA
Data
480Mbps

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

CH334P 产品概述

一、产品简介

CH334P 是南京沁恒(WCH)推出的一款 USB 集线器芯片,面向嵌入式与工业应用场景。芯片遵循 USB 2.0 协议,支持高速传输(最高 480 Mbps),提供 4 个下行通道,用于将单一路 USB 接口扩展为多路设备连接能力。其核心工作电压为 3.3V,适配主流 3.3V 逻辑电平系统。

二、主要特性

  • USB 协议:USB 2.0(兼容低速/全速/高速设备)
  • 数据速率:最高 480 Mbps(高速模式)
  • 通道数:4 个下行端口
  • 电源与功耗:工作电流典型值 85 mA,静态待机电流 0.4 mA
  • 工作电压:3.3 V(芯片逻辑电源)
  • 工作温度范围:-40℃ ~ +85℃(工业级温度范围)
  • 封装形式:QFN-16(3 × 3 mm),便于小尺寸 PCB 设计与批量生产

三、典型应用

CH334P 适用于需要扩展 USB 接口但空间受限或对环境要求较高的场合,包括但不限于:

  • 工业控制与现场设备(PLC、数据采集单元)
  • POS 机、票务终端与自助服务终端
  • 嵌入式主板、单板计算机与网关设备
  • 医疗设备与测试仪器(需满足宽温要求的设备)
  • 小型消费电子及外设扩展坞

四、电气与可靠性要点

芯片在 3.3V 供电下工作,典型工作电流为 85 mA,静态(无活动)电流仅 0.4 mA,有利于低功耗系统设计。工业级温度范围保证在恶劣环境下的稳定性。设计时应注意与系统 5V VBUS 的隔离与管理(USB 总线电源与芯片内部逻辑电源通常分开考虑),并遵循 USB 接地与差分信号线布线规范,以保证高速信号完整性与电磁兼容性能。

五、封装与布局建议

CH334P 采用 QFN-16(3×3 mm)小封装,适合密集型布局。建议在 PCB 布局时:

  • 对差分 D+/D- 信号走线采用对称、等长、受控阻抗布局;
  • 在芯片近旁放置解耦电容并靠近 VCC 引脚布置;
  • 预留热焊盘/散热过孔以提升热稳定性,尤其在长期满载工作场景下;
  • 考虑 USB 端口的电源保护(如熔丝、过流保护、ESD 抑制)

六、使用建议与注意事项

在选型与设计过程中,应结合系统的电源拓扑(总线供电或自供电)确定端口电流分配策略;对高可靠性应用,可在下游端口加入物理开关或电流监控;进行 EMC 认证时,注意差分线长度、旁路电容和器件接地处理。建议参考厂商数据手册以获得完整的引脚定义、时序要求及典型应用电路。

七、小结

CH334P 是一款为空间受限和工业环境设计的高集成度 USB 2.0 四通道集线器芯片,具备高速传输能力、低静耗和宽温工作能力。其 QFN-16 小封装和 3.3V 工作电压使其便于与现代嵌入式平台集成,是扩展 USB 接口的稳妥选择。欲获得更详细的引脚与参考设计信息,请参考 WCH 官方数据手册。

Request for quote

Send RFQ

Use the form for single models, category sourcing, and multi-line BOM requirements.

Send your target model and quantity.

Product sourcing intelligence

Model, package, availability, and BOM fit reviewed before quotation.

WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.

Electronic component model and package intelligence review on an ESD-safe inspection bench

Model & package intelligence

Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.

BOM matching and alternative component comparison workstation with protected IC samples

BOM matching & alternatives

BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.

Electronic component sourcing availability dashboard with ESD-protected samples

Sourcing availability signal

Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.

Buyer sourcing scenarios

Examples of how common component sourcing requests are organized.

Typical RFQ scenarios based on the WMSIC form fields, catalog data, manual review steps, and shipment preparation workflow.

The buyer shares the full part number, package requirement, quantity, destination, and available product photos so the quotation can record the exact version under review.

Package confirmation Typical RFQ workflow

A multi-line BOM is organized into direct sourcing lines, lines that need package clarification, and lines where alternative-part review is permitted.

Mixed BOM triage Typical RFQ workflow

The original manufacturer part number, datasheet revision, application, critical limits, and acceptable changes are collected before possible candidates are discussed.

Obsolete-part review Typical RFQ workflow

Sample quantity, minimum packing, package format, target date, and courier destination are kept together in one RFQ conversation.

Small-batch request Typical RFQ workflow

Package photos, model markings, board context, and the quantity needed for repair help focus the sourcing review on the relevant version.

Repair batch evidence Typical RFQ workflow

When a suffix or package note is incomplete, the response records the open difference and requests buyer confirmation before procurement proceeds.

Model suffix clarification Typical RFQ workflow

Packing format, carton notes, invoice details, courier option, destination, and tracking handoff are coordinated around the confirmed order.

Export handoff Typical RFQ workflow

The request connects the previously used model, current demand, package evidence, target timing, and replenishment sourcing route.

Replenishment inquiry Typical RFQ workflow

Related products

Packaged components ready for RFQ.