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LM3909N from NS,National Semiconductor

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LM3909N

Manufacturer: NS

LM3909 LED Flasher/Oscillator

Partnumber Manufacturer Quantity Availability
LM3909N NS 57 In Stock

Description and Introduction

LM3909 LED Flasher/Oscillator The LM3909N is a monolithic oscillator IC manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Type:** LED Flasher/Oscillator  
- **Supply Voltage Range:** 1.5V to 5V  
- **Low Current Consumption:** Typically 0.3mA (at 1.5V)  
- **Oscillation Frequency:** Adjustable via external components  
- **Output Current:** Up to 25mA (suitable for driving LEDs directly)  
- **Package:** 8-Pin DIP (Dual In-line Package)  
- **Operating Temperature Range:** 0°C to +70°C  

### **Descriptions:**  
The LM3909N is designed to flash an LED efficiently from a low-voltage supply (as low as 1.5V). It includes an internal oscillator and a voltage boost circuit, eliminating the need for an external inductor.  

### **Features:**  
- **Low Voltage Operation:** Works down to 1.5V  
- **Simple Circuit Design:** Requires minimal external components  
- **LED Driver Capability:** Directly drives an LED without additional transistors  
- **Adjustable Flash Rate:** Timing determined by external capacitor and resistor  
- **Monolithic Construction:** Reliable and compact  

This IC is commonly used in low-power LED flasher applications, battery-powered indicators, and simple timing circuits.

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