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LM2889N from NATIONAL,National Semiconductor

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LM2889N

Manufacturer: NATIONAL

LM2889 TV Video Modulator

Partnumber Manufacturer Quantity Availability
LM2889N NATIONAL 42 In Stock

Description and Introduction

LM2889 TV Video Modulator The LM2889N is a monolithic integrated circuit manufactured by **NATIONAL**.  

### **Specifications:**  
- **Type:** Audio Power Amplifier  
- **Package:** 14-Pin DIP (Dual In-line Package)  
- **Output Power:** 1W (typical)  
- **Supply Voltage Range:** 4V to 12V  
- **Quiescent Current:** 4mA (typical)  
- **Gain:** Internally fixed at 34dB  
- **Operating Temperature Range:** 0°C to +70°C  

### **Descriptions:**  
- Designed for **low-power audio amplification** applications.  
- Includes **internal thermal shutdown protection**.  
- Features **low distortion and noise** for improved audio quality.  
- Suitable for **battery-operated devices** due to low power consumption.  

### **Features:**  
- **Single-Supply Operation** (4V to 12V)  
- **Internally Fixed Gain** (34dB)  
- **Low Quiescent Current** (4mA typical)  
- **Thermal Shutdown Protection**  
- **Low Distortion**  
- **Designed for Portable and Consumer Audio Applications**  

This information is based on the manufacturer's datasheet.

Application Scenarios & Design Considerations

LM2889 TV Video Modulator
Partnumber Manufacturer Quantity Availability
LM2889N NS 17 In Stock

Description and Introduction

LM2889 TV Video Modulator The LM2889N is a monolithic integrated circuit manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Function:** Tone Ringer  
- **Operating Voltage Range:** 15V to 28V  
- **Operating Temperature Range:** -20°C to +70°C  
- **Package:** 14-Pin DIP (Dual In-Line Package)  
- **Output Drive Capability:** Directly drives a piezoelectric transducer or a speaker with an external transformer  
- **Features Adjustable Ring Frequency and Cadence**  

### **Descriptions and Features:**  
- Designed for telephone applications requiring a high-voltage tone ringer.  
- Operates from a rectified telephone line voltage.  
- Includes an internal regulator for stable operation.  
- Provides two distinct tone frequencies for a pleasant ringing sound.  
- Adjustable cadence (ring pattern) via external components.  
- Low standby current consumption.  
- Includes built-in hysteresis for noise immunity.  
- Compatible with both mechanical and electronic telephone bell replacements.  

This device is optimized for use in telephone systems and other applications requiring an audible alert signal.

Application Scenarios & Design Considerations

LM2889 TV Video Modulator

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