Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
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Technical data
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
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。
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:
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。
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:
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。
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。
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Product sourcing intelligence
WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.
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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.
A multi-line BOM is organized into direct sourcing lines, lines that need package clarification, and lines where alternative-part review is permitted.
The original manufacturer part number, datasheet revision, application, critical limits, and acceptable changes are collected before possible candidates are discussed.
Sample quantity, minimum packing, package format, target date, and courier destination are kept together in one RFQ conversation.
Package photos, model markings, board context, and the quantity needed for repair help focus the sourcing review on the relevant version.
When a suffix or package note is incomplete, the response records the open difference and requests buyer confirmation before procurement proceeds.
Packing format, carton notes, invoice details, courier option, destination, and tracking handoff are coordinated around the confirmed order.
The request connects the previously used model, current demand, package evidence, target timing, and replenishment sourcing route.
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