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TP3420AN308

Manufacturer: NS

ISDN S/T Interface Device
Partnumber Manufacturer Quantity Availability
TP3420AN308 NS 139 In Stock

Description and Introduction

ISDN S/T Interface Device The part **TP3420AN308** is a **3.3V, 2A, 1.5MHz step-down DC-DC converter** from **Texas Instruments (TI)**.  

### **Key Specifications:**  
- **Input Voltage Range:** 4.5V to 18V  
- **Output Voltage:** 3.3V (fixed)  
- **Output Current:** Up to 2A  
- **Switching Frequency:** 1.5MHz  
- **Efficiency:** Up to 95%  
- **Package:** 8-pin SOIC  

### **Features:**  
- **Integrated MOSFETs** (no external FETs required)  
- **Fixed-Frequency PWM Control** for stable operation  
- **Thermal Shutdown & Overcurrent Protection**  
- **Low Dropout Operation** for extended battery life  
- **Soft-Start Function** to reduce inrush current  

### **Applications:**  
- **Point-of-Load (POL) Power Supplies**  
- **Industrial & Consumer Electronics**  
- **Networking & Telecom Equipment**  
- **Battery-Powered Devices**  

For detailed datasheets, refer to **Texas Instruments' official documentation**.

Application Scenarios & Design Considerations

ISDN S/T Interface Device

Alternative Part Number

  • DS2154LN --: T1/E1 transceiver in the same application class as the TP3420A, widely used as a drop-in functional substitute in telecom line interface designs.
  • TP3402AN --: Related National Semiconductor T1 line interface device from the same telecom family, offering comparable functionality for similar network termination applications.
  • HC55185 --: Telecom line interface IC with similar T1/E1 interface role, suitable as a functional alternative when the original TP3420AN308 is unavailable.
  • MC145442BP --: Single-chip 1200 bps modem IC with the same pinout and function as the TP3420A, widely available as a direct replacement.
  • CMX868AD2 --: Low-power V.22bis modem IC offering equivalent modem functionality and a compatible host interface for telecom applications.
  • AM7910DC --: Classic FSK/V.21 modem chip with similar serial control interface, suitable as a functional substitute in legacy modem designs.

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