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XRT73L04BIV from EXAR

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XRT73L04BIV

Manufacturer: EXAR, XRT, XR

4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT

Partnumber Manufacturer Quantity Availability
XRT73L04BIV EXAR, XRT, XR 102 In Stock

Description and Introduction

4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT The XRT73L04BIV is a quad T1/E1/J1 Line Interface Unit (LIU) manufactured by Exar Corporation (XR). Below are the factual details from Ic-phoenix technical data files:

### **Specifications:**  
- **Part Number:** XRT73L04BIV  
- **Manufacturer:** Exar Corporation (XR)  
- **Type:** Quad T1/E1/J1 Line Interface Unit (LIU)  
- **Interface Standards:** Supports T1 (1.544 Mbps), E1 (2.048 Mbps), and J1 (Japanese standard)  
- **Operating Voltage:** 3.3V  
- **Package:** 128-pin TQFP (Thin Quad Flat Package)  
- **Temperature Range:** Industrial (-40°C to +85°C)  
- **Data Rate:** 1.544 Mbps (T1/J1) or 2.048 Mbps (E1)  
- **Jitter Attenuation:** Built-in jitter attenuator  
- **Line Impedance:** Programmable for 75Ω (E1) or 100Ω (T1/J1)  
- **Transmit and Receive:** Independent for each channel  

### **Descriptions:**  
- The XRT73L04BIV is a highly integrated quad LIU designed for telecom applications.  
- It provides full-duplex operation for four independent T1/E1/J1 lines.  
- Includes line build-out (LBO) control and adaptive equalization for signal integrity.  
- Features a flexible clocking architecture for system synchronization.  

### **Features:**  
- **Four Independent Channels:** Each channel supports T1, E1, or J1.  
- **Built-in Jitter Attenuator:** Reduces timing jitter for improved signal quality.  
- **Programmable Termination:** Supports 75Ω (E1) or 100Ω (T1/J1).  
- **Line Build-Out (LBO):** Adjustable for short/long haul applications.  
- **Loss of Signal (LOS) Detection:** Automatic detection of signal failure.  
- **Loopback Modes:** Supports local, remote, and digital loopback for testing.  
- **Industrial Temperature Range:** Operates from -40°C to +85°C.  
- **Low Power Consumption:** Optimized for power-sensitive applications.  

This information is based solely on the manufacturer's specifications. For further details, refer to the official datasheet from Exar (XR).

Application Scenarios & Design Considerations

4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT

Alternative Part Number

  • DS3150TN --: Single-channel T1/E1/J1 line interface unit in the same function class as the XRT73L04B, widely used as a drop-in alternative for telecom LIU designs.
  • IDT82V2084 --: Quad-channel T1/E1/J1 line interface unit offering comparable multi-channel LIU functionality with a different naming series, suitable for board-level replacement.
  • PM4354 --: Multi-channel T1/E1 transceiver/LIU with similar telecom interface features, providing a feasible alternative from a different vendor family.
  • PM4351-RI --: Multi-channel T1/E1 transceiver offering comparable line interface and framing capabilities, suitable for telecom access designs requiring the XRT73L04BIV function.
  • IDT82V2044 --: Quad-channel T1/E1 line interface unit with integrated framing support, matching the multi-channel telecom interface role of the original part.
  • DS2154LN --: Quad E1/T1/J1 line interface transceiver with similar functionality and pin-compatible architecture, widely used as a drop-in replacement for the XRT73L04 family.

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