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TDA4445B from ST,ST Microelectronics

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TDA4445B

Manufacturer: ST, TFK

Quasi Parallel Sound Processing with Quadrature Intercarrier Demodulator

Partnumber Manufacturer Quantity Availability
TDA4445B ST, TFK 5019 In Stock

Description and Introduction

Quasi Parallel Sound Processing with Quadrature Intercarrier Demodulator The TDA4445B is a component manufactured by TFK (Telefunken). Below are the specifications, descriptions, and features based on available factual information:  

### **Specifications:**  
- **Manufacturer:** TFK (Telefunken)  
- **Part Number:** TDA4445B  
- **Type:** Integrated Circuit (IC)  
- **Function:** Video IF Amplifier and Demodulator  
- **Package:** Likely DIP (Dual In-line Package) or similar, though exact package type may vary.  
- **Operating Voltage:** Typically operates at a supply voltage of **12V** (exact range may vary).  
- **Frequency Range:** Designed for Intermediate Frequency (IF) processing, commonly used in TV and video applications.  
- **Demodulation:** Includes FM demodulation for sound and video signal processing.  

### **Descriptions:**  
The TDA4445B is a monolithic integrated circuit designed for use in television and video applications. It functions as a video IF amplifier and demodulator, processing intermediate frequency signals to extract video and sound components.  

### **Features:**  
- **Video IF Amplification:** Provides high gain for weak IF signals.  
- **Synchronous Demodulation:** Ensures accurate video signal recovery.  
- **FM Sound Demodulation:** Includes circuitry for sound IF processing.  
- **AGC (Automatic Gain Control):** Maintains stable signal levels.  
- **Low Noise:** Designed for minimal signal distortion.  

For exact electrical characteristics, pin configurations, or application circuits, refer to the official TFK datasheet (if available).

Application Scenarios & Design Considerations

Quasi Parallel Sound Processing with Quadrature Intercarrier Demodulator

Alternative Part Number

  • LM1881N --: Video sync separator IC commonly used in the same TV/video signal processing role; widely available and pin-compatible in function.
  • EL2210CN --: Video sync and processing IC offering similar sync separation and signal handling functions for CRT/TV applications.
  • HA11235 --: Classic TV sync/deflection signal processing IC used in similar television chassis designs as a functional substitute.
  • TDA4443 --: Same TDA44xx family IF video amplifier with similar pinout and function; widely available and often used as a direct substitute in TV IF stages.
  • TDA4440 --: Comparable TV IF amplifier IC from the same era with similar gain and AGC behavior; can replace TDA4445B with minor circuit checks.
  • LA7520 --: Alternative TV IF/video processing IC with similar functionality; requires pinout verification but is a feasible cross-series substitute.

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