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LM809M3X-4.38/NOPB

3-pin voltage supervisor (reset IC) with 4.38V threshold, active-low push-pull reset output, 15µA Iq, SOT-23

2012

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جزء الشركة المصنعة ： جزء الشركة المصنعة

LM809M3X-4.38/NOPB

الحزمة ： الحزمة

SOT-23 (DBZ) | 3 pins (2.92 x 1.3 x 1.22 mm)

العلامة التجارية ： العلامة التجارية
فئات المنتجات:：فئات المنتجات
الالتزام بالجودة
الشحن والدفع
الخدمة والتغليف
دليل المنتج
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الوصف

نظرة عامة على المنتج

The LM809M3X-4.38/NOPB from Texas Instruments is a 3-pin microprocessor supervisory reset circuit with an active-low, push-pull reset output. Designed in a SOT-23 (DBZ) package, it monitors supply voltages with a factory-programmed 4.38V threshold, making it ideal for 5V system monitoring in portable and digital equipment.

المواصفات الرئيسية

Threshold Voltage 4.38 V
نطاق جهد الإمداد 1 V to 5.5 V
Supply Current (Typ) 15 µA
Reset Output Active-Low, Push-Pull
Reset Timeout (Typ) 240 ms
Reset Threshold Accuracy 3%
درجة حرارة التشغيل -40°C to +105°C
الحزمة SOT-23 (DBZ) | 3 pins

الميزات

  • Precision monitoring of supply voltages
  • 140-ms minimum power-on reset pulse width (240-ms typical)
  • Active-low RESET output
  • Ensured RESET valid for VCC ≥ 1 V
  • Low supply current of 15 µA typical
  • Power supply transient immunity
  • Superior upgrade to MAX809/MAX810

التطبيقات

  • Microprocessor and digital systems
  • Portable and battery-powered equipment
  • Embedded controllers
  • Intelligent instruments
  • 5V and 3.3V supply monitoring

The LM809M3X-4.38/NOPB is a 3-pin microprocessor supervisory circuit from Texas Instruments that monitors the VCC supply voltage and asserts a reset signal whenever this voltage declines below the factory-programmed 4.38V reset threshold. The reset signal remains asserted for 240 ms after VCC rises above the threshold. The device features an active-low push-pull RESET output with a supply current of only 15 µA, making it ideal for use in portable and battery-powered equipment. It is fully specified over temperature from -40°C to +105°C.

The LM809 operates as a voltage monitoring circuit with two main subsystems: (1) Voltage Comparison: A precision voltage comparator continuously monitors the VCC supply against the 4.38V reference threshold. When VCC drops below the threshold, the comparator triggers the reset output. (2) Reset Timer: Once VCC rises above the threshold, an internal timer holds the RESET output active for a minimum of 140 ms (240 ms typical) to allow the microprocessor to properly initialize before releasing reset. The push-pull output stage provides fast, defined transitions without external pull-up resistors.

دبوس الاسم النوع الوصف
1 GND أرضي Ground connection
2 إعادة الضبط المخرجات Active-low reset output (push-pull)
3 VCC الطاقة Supply voltage input (1V to 5.5V)
  • 5V microprocessor system power monitoring and reset generation
  • Portable equipment brownout detection
  • Embedded controller power-on reset
  • Battery-powered digital systems requiring low quiescent current
  • Intelligent instruments and consumer electronics
الطراز الشركة المصنعة Threshold الحزمة الملاحظات
MAX809LTR-4.38 Maxim/ADI 4.38V SOT-23-3 Direct equivalent
CAT809TTBI-G3 أونسمي 4.38V SOT-23-3 Pin-compatible
LM809M3-4.38/NOPB TI 4.38V SOT-23-3 Smaller reel option
APX809-46SA-7 شركة ديودز 4.63V SOT-23-3 Higher threshold option
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ضمان الجودة

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

الشحن والدفع

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

الخدمة والتغليف

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

Core Services

1. One-stop Sourcing & BOM Support

We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

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5. Sourcing for Special Components

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6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

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2. Classified Professional Packaging

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  • Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
  • Discrete Device Packaging: Discrete devices such as SMD resistors, power resistors and LEDs are quantitatively and classifiedly packaged with accurate quantity and clear marking.
  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

3. Custom Packaging Services

We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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