The XRT82D20IW-F is a Dual Channel T1/E1/J1 framer with integrated line interface units (LIUs), manufactured by Exar Corporation. It's a highly integrated solution designed for telecommunications applications that require T1, E1, or J1 connectivity. This device provides framing, line interface, and clocking functions necessary for reliable data transmission.

Applications

• Digital Cross-Connect Systems (DCS)
• PBX systems
• Channel Service Units (CSU) / Data Service Units (DSU)
• Voice over IP (VoIP) gateways
• Wireless base stations
• Network interface cards (NICs)

Features

• Dual channel T1/E1/J1 framer
• Integrated Line Interface Units (LIUs)
• Supports T1 (1.544 Mbps), E1 (2.048 Mbps), and J1 signaling
• Flexible clocking options, including clock recovery and generation
• Integrated jitter attenuation
• HDLC controller for data link layer processing
• Line build-out (LBO) options for optimizing signal transmission
• Diagnostic loopback capabilities
• Low power consumption

Benefits

• Reduced component count and board space due to high integration
• Simplified system design and development
• Improved signal integrity and performance
• Lower power consumption for energy-efficient systems
• Enhanced system reliability through robust framing and LIU functionality
• Cost-effective solution for dual-channel T1/E1/J1 applications

Additional Details

The XRT82D20IW-F operates from a single 3.3V power supply. Its integrated LIUs provide the necessary impedance matching and pulse shaping for direct connection to T1/E1/J1 lines. The flexible clocking options allow the device to synchronize to various clock sources, or generate its own clock signal. The integrated jitter attenuator helps to reduce jitter and wander, improving signal quality. The HDLC controller enables efficient data link layer processing. The LBO options allow the device to be optimized for different cable lengths. The diagnostic loopback capabilities facilitate system testing and troubleshooting. It is usually offered in a surface-mount package for ease of manufacturing. The XRT82D20IW-F provides a complete and cost-effective solution for dual-channel T1/E1/J1 framing and line interface applications.