HC4P5504DLC-5

Telecom Overview

The HC4P5504DLC-5 is an integrated Subscriber Line Interface Circuit (SLIC) designed for ITU-compliant PABX applications. It provides a 40mA loop feed current to support subscriber line operations. The device integrates essential telephony functions including DC battery feed, ring relay driving, supervisory signaling, and hybrid circuitry. Packaged in a 28-pin PLCC format measuring 11.51x11.51 mm, it is engineered to maintain transmission performance standards within private branch exchange systems.

Telecom Feature Summary

• Integrates complete SLIC functionality including loop feed, ring relay driver, and supervisory circuits
• Designed for ITU low-cost PABX subscriber line interface applications
• Maintains transmission performance standards for reliable voice communication

Telecom Applications

• Private Branch Exchange (PABX) systems
• Subscriber line interface circuits
• Telecommunications equipment requiring ITU compliance

Telecom Procurement Notes

Verify the manufacturer origin, as Harris Corporation assets were acquired by L3Harris Technologies. Confirm the specific package type matches the 28-PLCC requirement. Ensure the part number suffix indicates the correct temperature range and variant. Cross-reference with official L3Harris documentation to validate authenticity and technical specifications before procurement.

Telecom Selection Notes

Select this component for applications requiring a dedicated SLIC solution with a 40mA loop feed capability. It is suitable for PABX designs needing integrated hybrid and supervisory functions without external discrete components. Consider the 28-PLCC package constraints for PCB layout. Verify compatibility with the target system's voltage and signaling requirements against the official datasheet.

Telecom Part Context

This component belongs to the SLIC family from Harris Corporation, now part of L3Harris Technologies following a 2019 merger. The product line focuses on telecommunications interface solutions. The HC4P5504DLC-5 specifically targets cost-effective PABX implementations, providing essential line interface functions in a single integrated circuit package.

Telecom Replacement Considerations

Consult L3Harris Technologies official documentation for confirmed substitute part numbers. Verify pinout and electrical parameter compatibility before substitution. No generic cross-references are provided due to lack of verified public substitute data.