XRT86VL32IB

Overview

The XRT86VL32IB is a dual-channel DS1/E1/J1 framer and Line Interface Unit (LIU) integrated circuit manufactured by MaxLinear. It operates within an industrial temperature range of -40°C to +85°C and utilizes a 225-pin Plastic Ball Grid Array (PBGA) package. The device supports data rates of 1.544 Mbit/s, 2.048 Mbit/s, 4.096 Mbit/s, and 8.192 Mbit/s, with multiplexed support for 12.352/16.384 Mbit/s on the backplane bus. It features a 1.8V inner core with 3.3V CMOS operation and 5V tolerant inputs.

Feature Summary

• Integrates two independent full-duplex DS1 Tx and Rx Framer/LIUs utilizing R3 technology for relayless, reconfigurable, and redundant operation.
• Includes three integrated HDLC controllers per channel supporting SS7 and V5.1/V5.2 interfaces with direct access to D and E channels.
• Provides extensive diagnostic capabilities including PRBS generation, boundary scan JTAG testing, and performance monitoring with one-second polling.
• Features 512-bit elastic store slip buffers on transmit and receive paths to attenuate jitter and wander for asynchronous backplane connections.

Applications

• High-density T1/E1/J1 interfaces for multiplexers, switches, LAN routers, and digital modems
• SONET/SDH terminal or Add/Drop Multiplexers (ADMs)
• Channel Service Units (CSUs) and Digital Access Cross-connect Systems (DACs)
• ISDN Primary Rate Interfaces (PRA) and PBX systems

Procurement Notes

Verify component authenticity through authorized distribution channels due to potential availability constraints. Confirm that the specific ordering suffix matches the required package type and operating temperature range. Review Product Change Notifications (PCN) and End-of-Life (EOL) documentation for discontinuance schedules. Ensure compliance with RoHS directives and moisture sensitivity levels prior to assembly.

Selection Notes

Select this component when a compact solution for dual-channel T1/E1/J1 framing and line interfacing is required. The device is suitable for designs needing integrated HDLC processing and robust alarm detection. Verify that the system architecture supports the 225-pin PBGA footprint and accommodates the necessary power supply voltages. Consider thermal management requirements for the specified industrial temperature range.

Part Context

This part belongs to the XRT86 series of telecom interface ICs designed for high-density digital signal processing. It serves as a bridge between microprocessor systems and T1/E1/J1 transmission lines. The integration of framing and LIU functions reduces board space compared to discrete solutions. It is commonly used in telecommunications infrastructure requiring reliable signal synchronization and error monitoring.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative devices from the same manufacturer family based on pin compatibility and register mapping. Verify functional equivalence regarding supported signaling types and interface speeds before implementation.