XRT86L30IV-F

Overview

The XRT86L30IV-F is a single-channel T1/E1/J1 framer and Line Interface Unit (LIU) combo IC manufactured by MaxLinear. It operates at data rates of 1.544 Mbit/s or 2.048 Mbit/s and utilizes R3 technology for relayless, reconfigurable, and redundant line card applications. The device integrates DS1/E1/J1 framing, error accumulation, slip buffers, and HDLC controllers compliant with ANSI/ITU-T standards. It features a 128-pin LQFP package and supports an operating temperature range from -40 °C to +85 °C.

Feature Summary

• Integrates full-duplex DS1 Tx/Rx Framer and LIU with two 512-bit elastic store PCM frame slip buffers on TX and Rx paths.
• Includes three integrated HDLC controllers supporting SS7, V5.1/V5.2 interfaces, and timeslot assignable HDLC.
• Provides comprehensive diagnostic capabilities including PRBS generation/detection, boundary scan JTAG test port, and performance monitoring.
• Supports multiple signaling types such as CAS, CCS, ISDN PRI, and robbed bit signaling extraction/insertion.

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 the specific suffix 'IV' against official documentation to confirm the 128-pin LQFP package and industrial temperature range (-40°C to +85°C). Confirm current availability status directly with the manufacturer or authorized distributors, as legacy telecom interface components may have limited supply chains or end-of-life implications.

Selection Notes

Select this component when a single-channel solution combining framing and line interface functions is required. Ensure the design supports 3.3V CMOS operation with 5V tolerant inputs. Verify that the system architecture can accommodate the 128-pin LQFP footprint and requires support for Intel/Motorola microprocessor interfaces or DMA modes.

Part Context

This part belongs to the XRT86L30 series of single-channel T1/E1/J1 framers/LIUs. It is designed for high-density telecommunications equipment where space efficiency and comprehensive protocol handling are critical. The integration of R3 technology allows for flexible redundancy schemes without mechanical relays.

Replacement Considerations

Consult official datasheets for cross-reference information. Potential alternatives within the same family include variants with different packaging or temperature ratings, but direct functional substitutes must be verified against pinout compatibility and electrical specifications.

FAQ

What signaling protocols does the XRT86L30 support?

The device supports Channel Associated Signaling (CAS), Common Channel Signalling (CCS), ISDN Primary Rate Interface (ISDN PRI) signaling, and extracts/inserts robbed bit signaling (RBS).

How many HDLC controllers are integrated into the chip?

The XRT86L30 contains three integrated HDLC controllers for transmit and receive operations, each equipped with two 96-byte buffers.

What loopback modes are available for diagnostics?

The device supports Local Loopback (LLB), Line Remote Loopback (LB), and various digital/framer-specific loopback configurations for testing.