XRT75L04IV-F

Overview

The XRT75L04IV-F is a four-channel Line Interface Unit (LIU) manufactured by MaxLinear, designed for DS3, E3, and STS-1 telecommunications applications. It operates at a fixed supply voltage of 5 V and supports data rates up to 44.736 Mb/s. The device functions within an industrial temperature range of -40°C to +85°C. It is housed in a 176-pin LQFP surface-mount package with dimensions of 24x24 mm. The component weighs approximately 2 grams and exhibits moisture sensitivity. This integrated circuit serves as a critical interface for high-speed digital signal transmission in telecom infrastructure.

Feature Summary

• Integrates four independent LIU channels for simultaneous DS3, E3, or STS-1 line interfacing
• Supports standard telecommunications signaling protocols without external transceivers
• Designed for robust operation in industrial temperature environments

Applications

• DS3/E3/STS-1 line interface units
• Telecommunications network equipment
• Digital cross-connect systems

Procurement Notes

Verify the current lifecycle status before integration, as this component is listed as obsolete. Confirm that the 176-LQFP footprint matches your PCB design constraints. Ensure compliance with RoHS requirements by checking the specific manufacturing date code against updated environmental declarations. Source only from authorized distributors to mitigate counterfeit risks associated with end-of-life parts.

Selection Notes

Select this part when a quad-channel solution for DS3, E3, or STS-1 interfaces is required. Compare channel count and package size against alternatives like the XRT75L03IV-F if fewer channels suffice. Verify that the 5V power supply requirement aligns with your system architecture. Consider the 176-pin LQFP form factor for thermal and space constraints in dense telecom assemblies.

Part Context

This component belongs to the XRT75L04 series of telecom interface ICs. It shares functional similarities with other LIUs in the MaxLinear portfolio but is distinct in its four-channel configuration. Related variants include the XRT75L03IV-F for three-channel applications. The series focuses on providing integrated line interface capabilities for high-speed digital telecom standards.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the component is marked as obsolete, engineering teams should consult official obsolescence notices or contact MaxLinear directly for potential last-time buy options or approved replacement recommendations.