HC4P5509A1R3060

Telecom Overview

The Intersil HC4P5509A1R3060 is a Subscriber Line Interface Circuit (SLIC) integrating BORSCHT functions. It utilizes a Dielectric Isolation (DI) monolithic process for high-voltage operation between telephone subscriber pairs and low-voltage line card circuitry. The device withstands 1000V lightning-induced surges when paired with external protection diodes and feed resistors. It operates from a single +5V supply (VB+) and maintains transmission performance under externally induced longitudinal currents. Key integrated features include an internal ring relay driver, utility relay driver, and an on-chip operational amplifier for two-wire impedance matching.

Telecom Feature Summary

• Integrates comprehensive BORSCHT functions including battery feed, overvoltage protection, and supervisory signaling.
• Features an internal ring relay driver and utility relay driver to reduce external component count.
• Includes an on-chip operational amplifier designed specifically for two-wire impedance matching applications.
• Supports selective power denial to subscribers while maintaining voice path activity during power loss events.

Telecom Applications

• Solid state line interface circuits for Private Branch Exchange (PBX) systems
• Subscriber line interfaces for Central Office (CO) telecommunications equipment

Telecom Procurement Notes

Verify the specific ordering suffix against official Intersil documentation to confirm package type and temperature range. Ensure compatibility with required surge protection components, as the IC relies on external diode bridges and feed resistors to achieve its specified 1000V surge withstand capability. Confirm RoHS compliance status if applicable to the specific manufacturing lot.

Telecom Selection Notes

Select this component for designs requiring a monolithic solution for traditional telephone subscriber pair interfacing. The dielectric isolation process is critical for handling high voltages relative to ground. Consider the need for external operational amplifiers if the on-chip op amp does not meet specific hybrid function requirements or if additional gain is needed beyond the integrated impedance matching capabilities.

Telecom Part Context

This SLIC belongs to the HC5509 family of subscriber line interface circuits manufactured by Intersil. These devices are engineered to replace discrete implementations of BORSCHT functions, simplifying the design of telecommunication line cards. The integration of relay drivers and hybrid circuits directly onto the die reduces board space and improves reliability in both PBX and central office environments.

Telecom Replacement Considerations

Consult official Intersil cross-reference data for direct replacements. Verify that any substitute device supports the same +5V positive supply requirement and offers comparable dielectric isolation characteristics for high-voltage subscriber line interfacing.