The MT90401AB is a T1/E1 framer manufactured by Zarlink Semiconductor. This device provides the necessary functions for terminating T1 or E1 lines, extracting timing, and performing line monitoring. It integrates both short haul and long haul line interfaces, allowing it to be used in a variety of network applications.

Applications

• Digital PBX systems
• Central office switches
• Wireless base stations
• Access concentrators
• Voice over IP (VoIP) gateways
• Channel service units/data service units (CSU/DSUs)

Features

• Selectable T1 or E1 operation
• Integrated short haul/long haul line interface
• Jitter attenuation
• Clock recovery
• Line monitoring (AIS, LOS, LOF)
• Framing and synchronization
• HDLC controller
• Microprocessor interface for control and monitoring

Benefits

• Reduced component count and board space due to integration
• Simplified system design
• Improved system reliability
• Flexible configuration options
• Cost-effective solution for T1/E1 termination
• Enhanced network performance through robust timing and monitoring

Additional Details

The MT90401AB supports both T1 (1.544 Mbps) and E1 (2.048 Mbps) line rates. It includes comprehensive line monitoring capabilities, such as Alarm Indication Signal (AIS), Loss of Signal (LOS), and Loss of Frame (LOF) detection. The integrated HDLC controller facilitates data transmission and signaling. The device operates from a single 3.3V or 5V supply. Its microprocessor interface allows for flexible control and monitoring of the framer's functions, making it adaptable to various system requirements. It is typically packaged in a PQFP package.