HC5549CMZ

Telecom Overview

The HC5549CMZ is a low power Subscriber Line Interface Circuit (SLIC) manufactured by Renesas Electronics Corporation. It features a 100V dielectrically isolated bipolar integrated circuit design housed in a 28-pin PLCC package. The device operates on a 5V supply and supports one channel with a gain of 59dB and a loop current capability of 45mA. It includes battery switch functionality for high and low voltage supplies, enabling optimized power dissipation in off-hook conditions and standby states consuming 35mW.

Telecom Feature Summary

• Provides 100V dielectric isolation for safety in subscriber line applications
• Integrates battery switching to manage high and low voltage supplies for power optimization
• Includes loop current, ground key, ring trip detect, and alarm output functions
• Features a low power standby state with minimal battery drain while maintaining loop supervision

Telecom Applications

• Short loop ISDN systems
• PABX (Private Automatic Branch Exchange) interfaces
• Pairgain applications
• European ISDN NT1+ designs requiring emergency line powering
• Battery-backed remote terminals

Telecom Procurement Notes

Verify the specific manufacturer source, as Intersil was acquired by Renesas. Confirm the component status is active or limited supply depending on regional availability. Ensure the PLCC-28 package matches the PCB footprint requirements. Check for any obsolescence notifications or alternate manufacturing site changes issued by the supplier prior to final procurement decisions.

Telecom Selection Notes

Select this component for applications requiring low power consumption in short loop configurations. It is suitable for environments needing emergency powering from the line, such as specific European ISDN standards. Consider the 100V isolation rating for safety compliance. Evaluate the need for integrated battery switching to reduce power dissipation during off-hook states compared to standard SLICs.

Telecom Part Context

The HC5549CMZ belongs to the telecom interface IC category, specifically designed as a Subscriber Line Interface Circuit. It is part of Renesas' portfolio following the acquisition of Intersil. The device addresses the need for efficient power management in digital subscriber lines, particularly where battery life and line-powered emergency operation are critical constraints.

Telecom Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Users should consult official Renesas resources for potential cross-references or updated components if discontinuation occurs.