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
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MD7039 是明达微推出的一款低功耗电压检测器,采用高耐压 NMOS 开漏输出结构,专为系统上电、掉电和欠压保护设计。芯片工作电压范围宽(1.5V 至 15V),检测阈值为 3.9V,复位信号为低电平有效,适用于单路电压监控场合。器件封装为 SOT-89-3,工作温度范围 -40℃ 至 +85℃,可在多种消费类与工业应用中替代传统复位解决方案。
MD7039 工作时,将被监控的电源 VCC 直接连接到芯片的 VCC 引脚,GND 接地。当 VCC 低于 3.9V 检测阈值时,芯片输出端(RESET)被拉低,产生低电平复位信号;当 VCC 提升超过阈值并稳定后,开漏输出释放,外部上拉电阻将输出拉到高电平,解除复位。由于输出为开漏结构,用户应根据系统逻辑电平选择合适的上拉电阻与上拉电压(上拉电压不得超过器件最大工作电压 15V)。
典型接线:
MD7039 提供 SOT-89-3 封装,体积小、散热性能好,适合表面贴装工艺。器件通过工业级温度范围验证,适合车载非严苛场合、工业控制与消费电子。出货前建议参考明达微提供的完整数据手册以获取详细的绝对最大额定值、典型电性曲线与封装尺寸资料。
总结:MD7039 以其宽工作电压、高耐压开漏输出、超低静态电流与紧凑封装,适合各种需要可靠复位与欠压监控的电子系统,是单路电压检测与系统复位设计的实用器件选择。若需详细电气特性或评估样片,建议联系明达微或查阅 MD7039 的完整规格书。
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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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