3 CHANNEL E3/DS3/STS-1 JITTER ATTENUATOR The XRT71D03IV is a highly integrated quad-port T1/E1/J1 framer and line interface unit (LIU) designed for applications in telecommunications and networking. Below are the factual specifications, descriptions, and features of the part:
### **Manufacturer:**
- Exar Corporation (now part of MaxLinear)
### **Key Specifications:**
- **Interface Standards:** Supports T1, E1, and J1 protocols.
- **Number of Ports:** Quad-port (4 independent channels).
- **Line Rate:**
- T1: 1.544 Mbps
- E1: 2.048 Mbps
- J1: 1.544 Mbps
- **Framing Formats:**
- T1: Superframe (SF) and Extended Superframe (ESF)
- E1: PCM-30, PCM-31, PCM-30 CRC, PCM-31 CRC
- J1: Japanese standard framing
- **LIU Features:**
- On-chip line termination resistors
- Programmable transmit and receive levels
- Short-haul and long-haul operation support
- Adaptive equalization for improved signal integrity
- **Clock Recovery:** Integrated digital clock recovery for jitter tolerance compliance.
- **Diagnostics & Monitoring:**
- Performance monitoring (BERT, error counts)
- Loopback modes (local, remote, analog, digital)
- Alarm detection (LOS, AIS, RAI, etc.)
- **Power Supply:**
- **Core Voltage:** 1.8V or 2.5V
- **I/O Voltage:** 3.3V
- **Package:** 144-pin LQFP (Low-Profile Quad Flat Package).
### **Features:**
- **Flexible Configuration:** Each port can independently operate in T1, E1, or J1 mode.
- **Low Power Consumption:** Optimized for power-sensitive applications.
- **HDLC Controller:** Supports HDLC processing for data channels.
- **Serial Control Interface:** SPI or microprocessor-compatible parallel interface for configuration.
- **Temperature Range:** Industrial-grade (-40°C to +85°C).
### **Applications:**
- VoIP gateways
- Digital cross-connect systems
- Access concentrators
- Wireless base stations
- T1/E1 test equipment
This information is based on the manufacturer's datasheet and technical documentation.
