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LM809M3-4.38NOPB from NSC,National Semiconductor

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LM809M3-4.38NOPB

Manufacturer: NSC

Active Low Wide Temperature 3-Pin Reset IC 3-SOT-23 -40 to 105

Partnumber Manufacturer Quantity Availability
LM809M3-4.38NOPB,LM809M3438NOPB NSC 1000 In Stock

Description and Introduction

Active Low Wide Temperature 3-Pin Reset IC 3-SOT-23 -40 to 105 The LM809M3-4.38NOPB is a microprocessor reset circuit manufactured by National Semiconductor (NSC).  

### **Specifications:**  
- **Type:** Voltage Monitor (Microprocessor Reset Circuit)  
- **Reset Threshold Voltage:** 4.38V  
- **Output Type:** Active-Low, Push-Pull  
- **Operating Voltage Range:** 1V to 5.5V  
- **Reset Timeout Period:** 140ms (min)  
- **Package:** SOT-23-3  
- **Operating Temperature Range:** -40°C to +85°C  
- **Quiescent Current:** 8µA (typical)  

### **Descriptions and Features:**  
- Monitors system voltage and provides a reset signal to the microprocessor when voltage falls below the threshold.  
- Active-low reset output ensures proper system initialization.  
- Low power consumption for battery-operated applications.  
- No external components required for operation.  
- Guaranteed reset output valid down to VCC = 1V.  
- Immune to short VCC transients.  

This device is commonly used in embedded systems, automotive electronics, and industrial controls to ensure reliable microprocessor operation.

Application Scenarios & Design Considerations

Active Low Wide Temperature 3-Pin Reset IC 3-SOT-23 -40 to 105

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