The XR2123ACP is a highly integrated single-chip transceiver designed for T1/E1 applications. Manufactured by Exar Corporation, this device incorporates all the necessary functions for transmitting and receiving data over T1 or E1 lines, simplifying board design and reducing overall system cost.

Applications

• T1/E1 Line Interface Units (LIUs): Used in telecommunications equipment to provide the physical layer interface to T1/E1 lines.
• PBX Systems: Integrated into private branch exchange systems for trunk connectivity.
• Channel Banks: Employed in channel banks to multiplex and demultiplex voice and data channels.
• Digital Cross-Connect Systems (DCS): Used in DCS equipment to switch and route T1/E1 signals.
• Voice over IP (VoIP) Gateways: Implemented in VoIP gateways to provide T1/E1 connectivity to the PSTN.

Features

• Single-Chip T1/E1 Transceiver: Integrates transmit and receive functions in a single package.
• Jitter Attenuator: Includes a built-in jitter attenuator to improve signal quality.
• Clock Recovery: Provides clock recovery functionality for reliable data reception.
• Line Build-Out (LBO): Offers programmable LBO to compensate for cable losses.
• Loopback Testing: Supports loopback testing for diagnostics and troubleshooting.
• Low Power Consumption: Designed for low power operation, suitable for energy-efficient applications.

Benefits

• Reduced Board Space: Integration of multiple functions in a single chip saves valuable board space.
• Simplified Design: The single-chip solution simplifies the design process and reduces development time.
• Improved Signal Quality: Jitter attenuation and clock recovery ensure reliable data transmission.
• Lower System Cost: Integration and reduced component count lower the overall system cost.
• Enhanced Reliability: Robust design and comprehensive testing ensure reliable operation.

Additional Details

The XR2123ACP typically operates from a single 3.3V or 5V power supply. It supports both short-haul and long-haul applications. The device is available in a compact package, suitable for high-density board layouts. Detailed technical specifications, including transmit power levels, receive sensitivity, and jitter performance, are available in the product datasheet from Exar Corporation.