IC Phoenix logo

Home ›  L  › L24 > LM1889

LM1889 from NSC,National Semiconductor

Fast Delivery, Competitive Price @IC-phoenix

If you need more electronic components or better pricing, we welcome any inquiry.

0.000ms

LM1889

Manufacturer: NSC

LM1889 TV Video Modulator

Partnumber Manufacturer Quantity Availability
LM1889 NSC 2000 In Stock

Description and Introduction

LM1889 TV Video Modulator The LM1889 is a video modulator integrated circuit manufactured by National Semiconductor (NSC). Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Manufacturer:** National Semiconductor (NSC)  
- **Type:** Video Modulator IC  
- **Operating Voltage:** 4.5V to 12V  
- **Modulation Standard:** NTSC/PAL  
- **Frequency Range:** VHF (Very High Frequency) band  
- **Audio Carrier Frequency:** Adjustable (typically 4.5 MHz for NTSC)  
- **Video Input:** Composite video (1Vpp standard)  
- **Audio Input:** FM-modulated audio signal  
- **Output Power:** Typically sufficient for short-range RF transmission  
- **Package:** 16-pin DIP (Dual In-line Package)  

### **Descriptions:**  
The LM1889 is designed to generate a TV-compatible RF signal by modulating composite video and audio signals into a VHF channel output. It is commonly used in applications such as video game consoles, security systems, and small-scale video transmitters.  

### **Features:**  
- Integrated video and audio modulation  
- Adjustable RF output channel selection  
- Low external component count  
- Compatible with both NTSC and PAL standards  
- Internal oscillator for carrier generation  
- Stable performance over a wide voltage range  

This information is strictly based on the LM1889's datasheet and manufacturer documentation.

Partnumber Manufacturer Quantity Availability
LM1889 310 In Stock

Description and Introduction

LM1889 TV Video Modulator The LM1889 is a monolithic integrated circuit designed by **National Semiconductor** (now part of Texas Instruments). It is specifically engineered for **TV video IF amplification, detection, and AGC (Automatic Gain Control)** applications.

### **Specifications:**
- **Supply Voltage (VCC):** 12V (typical)  
- **Operating Temperature Range:** -20°C to +85°C  
- **Package Type:** 16-pin DIP (Dual In-line Package)  
- **Power Dissipation:** 1.2W (max)  
- **Gain Control Range:** >60dB  
- **Input Sensitivity:** Typically 50µV for full output  
- **Bandwidth:** Designed for TV IF frequencies (e.g., 45.75 MHz for NTSC)  

### **Descriptions:**
- The LM1889 integrates **IF amplification, video detection, AGC, and sync processing** in a single chip.  
- It is optimized for **analog TV receivers** and provides stable performance under varying signal conditions.  
- The AGC circuit ensures consistent output levels despite input signal fluctuations.  

### **Features:**
- **Built-in Video Detector:** Extracts composite video from the IF signal.  
- **AGC with Delay Control:** Adjusts gain to maintain signal stability.  
- **Sync Processing:** Includes sync separator functionality.  
- **Low Noise IF Amplifier:** Enhances weak signal reception.  
- **Single Supply Operation:** Simplifies power requirements.  

The LM1889 is now considered obsolete, but it was widely used in **older TV receivers and video processing equipment**. For modern replacements, Texas Instruments may suggest alternative ICs with updated specifications.

Request Quotation

For immediate assistance, call us at +86 533 2716050 or email [email protected]

Part Number Quantity Target Price($USD) Email Contact Person
We offer highly competitive channel pricing. Get in touch for details.

Specializes in hard-to-find components chips