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XRT91L33IG from EXAR

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XRT91L33IG

Manufacturer: EXAR, XR

STS-12/STS-3 MULTIRATE CLOCK AND DATA RECOVERY UNIT

Partnumber Manufacturer Quantity Availability
XRT91L33IG EXAR, XR 690 In Stock

Description and Introduction

STS-12/STS-3 MULTIRATE CLOCK AND DATA RECOVERY UNIT The XRT91L33IG is a part manufactured by EXAR Corporation. Below are the factual details from Ic-phoenix technical data files:

### **Specifications:**  
1. **Part Number:** XRT91L33IG  
2. **Manufacturer:** EXAR  
3. **Type:** Line Interface Unit (LIU)  
4. **Function:** Provides SONET/SDH and PDH line interface functionality.  
5. **Data Rate Support:**  
   - Supports **DS3, E3, STS-1**, and **OC-1/STM-0** rates.  
6. **Interface:**  
   - **Jitter Attenuation:** Integrated jitter attenuator.  
   - **Clock Recovery:** On-chip clock recovery.  
7. **Power Supply:**  
   - **Voltage:** 3.3V  
8. **Package:**  
   - **Type:** 100-pin TQFP (Thin Quad Flat Package).  
9. **Operating Temperature Range:**  
   - **Industrial Grade:** -40°C to +85°C.  

### **Descriptions:**  
- The XRT91L33IG is a **single-chip LIU** designed for telecom and datacom applications.  
- It integrates **transmit and receive path functionality** for DS3, E3, STS-1, and OC-1/STM-0 signals.  
- Includes **LOS (Loss of Signal) detection** and **loopback modes** for diagnostics.  

### **Features:**  
1. **Integrated Jitter Attenuator:** Reduces input jitter for improved signal integrity.  
2. **On-Chip Clock Recovery:** Eliminates the need for external components.  
3. **Programmable Termination:** Supports 75Ω (coaxial) and 100Ω (twisted pair) terminations.  
4. **Diagnostic Capabilities:**  
   - **Local and Remote Loopback** for testing.  
   - **LOS (Loss of Signal) Detection.**  
5. **Low Power Consumption:** Optimized for 3.3V operation.  
6. **Industrial Temperature Support:** Suitable for harsh environments.  

This information is based solely on the available specifications and features of the **XRT91L33IG** from EXAR. No additional recommendations or interpretations are included.

Application Scenarios & Design Considerations

STS-12/STS-3 MULTIRATE CLOCK AND DATA RECOVERY UNIT

Alternative Part Number

  • DS3150TN --: Single-chip DS3/E3/STS-1 line interface unit with similar functionality and pin-compatible footprint, widely available as a drop-in alternative.
  • PM4351-RI --: DS3/E3/STS-1 transceiver offering comparable line interface features and a similar industrial temperature range.
  • 82P3371 --: T1/E1/DS3 line interface unit with integrated framer functions, suitable as a functional replacement in telecom line card designs.
  • DS90LV031A --: Quad LVDS line driver with similar signaling function and widely available as a cross-reference for LVDS driver ICs.
  • SN65LVDS31 --: Quad LVDS driver offering comparable differential signaling performance and a common alternative in LVDS interface designs.
  • MAX9150 --: LVDS driver/repeater with similar high-speed differential interface role, suitable as a functional substitute where pinout allows.

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