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LM389N from NS,National Semiconductor

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LM389N

Manufacturer: NS

LM389 Low Voltage Audio Power Amplifier with NPN Transistor Array

Partnumber Manufacturer Quantity Availability
LM389N NS 17710 In Stock

Description and Introduction

LM389 Low Voltage Audio Power Amplifier with NPN Transistor Array The LM389N is a low-power audio amplifier manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Type:** Low-power audio amplifier  
- **Supply Voltage (VCC):** 4V to 12V  
- **Output Power:** 325mW (typical) into 8Ω at 9V  
- **Gain:** Internally fixed at 20 (26dB)  
- **Input Impedance:** ~100kΩ  
- **THD (Total Harmonic Distortion):** 0.2% (typical)  
- **Quiescent Current:** 4mA (typical)  
- **Operating Temperature Range:** 0°C to +70°C  
- **Package:** 14-pin DIP (Dual In-line Package)  

### **Descriptions:**  
The LM389N is designed for low-voltage applications, providing sufficient audio amplification for small speakers or headphones. It includes an NPN transistor array, making it useful for additional circuit functions like switching or buffering.  

### **Features:**  
- Internal gain setting (20x)  
- Low quiescent current  
- Wide supply voltage range (4V–12V)  
- Includes three NPN transistors for auxiliary functions  
- Suitable for battery-powered applications  

For detailed electrical characteristics, refer to the official datasheet from National Semiconductor.

Application Scenarios & Design Considerations

LM389 Low Voltage Audio Power Amplifier with NPN Transistor Array

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