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.
PCF8574WS16ARAE(品牌:GR/国睿)是一款带中断输出的远程 8 位 I2C 总线 I/O 扩展器,封装为 SOP-16-300mil。器件工作电压范围宽(2.5V~6V),工作温度覆盖工业级(-40℃~+85℃),可在系统中用作开关量输入或准双向口输出,常见于人机接口、指示灯驱动和键盘矩阵等场景。
PCF8574 的每一路 I/O 为准双向结构,器件上电后各口处于高电平(弱上拉),外部可通过写寄存器置低以驱动负载或通过读操作检测外部输入。中断输出在检测到输入状态变化时向主机发出请求(通常为低电平),实现事件驱动式采样,降低主机轮询负担。由于 IOH 源电流较小,建议以低电平(下拉)驱动 LED 或通过外部上拉/驱动器提升输出能力。
器件通过标准 I2C SDA/SCL 接口通信,建议在总线上配合合理的上拉电阻(典型 2.2k~10kΩ,常用 4.7kΩ)与去耦电容(VCC 侧 0.1µF)。器件提供地址引脚用于地址配置,可最多并联 8 个设备实现 8×8 或更大扩展。中断线通常为开漏输出,需外部上拉。
封装:SOP-16-300mil,适合常规 PCB 插装与波峰/回流焊加工。型号:PCF8574WS16ARAE,品牌:GR(国睿)。如需批量采购或获取详细封装图与原理图参考,请联系供应商索取完整数据手册与应用笔记。
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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.
Buyer sourcing scenarios
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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