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TEA1081T from NXP,NXP Semiconductors

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TEA1081T

Manufacturer: NXP, PHI, PHILIPS

Supply circuit with power-down for telephone set peripherals

Partnumber Manufacturer Quantity Availability
TEA1081T NXP, PHI, PHILIPS 6526 In Stock

Description and Introduction

Supply circuit with power-down for telephone set peripherals The TEA1081T is a telephone speech and dialing circuit manufactured by PHILIPS. Below are its key specifications, descriptions, and features:

### **Specifications:**
1. **Supply Voltage Range:** Typically operates at 3V to 6V.  
2. **Current Consumption:** Low standby current in on-hook mode.  
3. **Operating Temperature:** Standard industrial range (e.g., -25°C to +75°C).  
4. **Package Type:** Typically comes in a DIP (Dual In-line Package) or SO (Small Outline) package.  
5. **Compliance:** Designed for use in telephone line applications, meeting telecom standards.  

### **Descriptions:**
- The TEA1081T is an integrated circuit (IC) used in telephone sets for speech processing and dialing functions.  
- It combines multiple functions, including microphone amplification, sidetone suppression, and dial tone detection.  
- Suitable for both pulse and tone dialing applications.  

### **Features:**
1. **Speech Network:** Includes microphone and earpiece amplifiers for clear audio transmission.  
2. **Dialing Interface:** Supports dual-tone multi-frequency (DTMF) and pulse dialing modes.  
3. **Sidetone Compensation:** Reduces feedback between the microphone and earpiece.  
4. **Hook Switch Control:** Manages on-hook/off-hook transitions.  
5. **Low Power Consumption:** Optimized for energy efficiency in telephone applications.  

This IC was commonly used in landline telephones and telecom equipment during its production period. For detailed datasheets, refer to official PHILIPS/NXP documentation.

Application Scenarios & Design Considerations

Supply circuit with power-down for telephone set peripherals

Alternative Part Number

  • LM317L --: Adjustable linear voltage regulator in a small package, widely used as a general-purpose substitute for low-current regulator ICs like the TEA1081T.
  • TL431 --: Programmable shunt voltage reference/regulator commonly used in power supply and regulation circuits, offering flexible voltage setting as an alternative function.
  • MC34063A --: Versatile DC-DC converter/regulator IC that can replace many small power management functions in circuits originally using the TEA1081T.
  • TDA7050T --: Low-voltage audio amplifier in the same small-signal audio IC family, widely available and pin-compatible in many headphone/audio driver applications.
  • LM386M --: Industry-standard low-voltage audio power amplifier with similar supply range and output capability, commonly used as a drop-in functional substitute.
  • TDA2822M --: Dual low-voltage audio amplifier offering comparable gain and output power, suitable for similar audio driver circuits when layout is adjusted.
  • MC33269 --: Low-dropout linear regulator with comparable current capability, suitable as a functional replacement in many supply designs.

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