HC55185FCM

Telecom Overview

The HC55185FCM is a Ringing Subscriber Line Interface Circuit (RSLIC) from the RSLIC-VoIP family, designed to support analog Plain Old Telephone Service (POTS). It operates with a maximum voltage of 100V, enabling subscriber loop lengths up to 500Ω. The device features low power consumption and supports sinusoidal or trapezoidal ringing waveforms. It includes robust auto-detection for on-hook and off-hook states, minimizing external discrete components. Integrated test access allows for loopback and line measurement tests.

Telecom Feature Summary

• Supports high operating voltage up to 100V for extended loop lengths
• Provides flexible ringing waveform options including sinusoidal and trapezoidal
• Integrates auto-detection mechanisms for subscriber line status
• Includes internal test access for loopback and line measurements

Telecom Applications

• Remote subscriber units in VoIP systems
• Wireless and wireline POTS applications
• Short and medium loop length telephone interfaces

Telecom Procurement Notes

Verify the specific suffix 'FCM' against official Intersil documentation to confirm package type and temperature range. Ensure compatibility with system requirements for 100V operation and low power consumption. Check for RoHS compliance status in current datasheets. Confirm availability as part numbers may be subject to change or obsolescence.

Telecom Selection Notes

Select this component when designing for analog POTS interfaces requiring high ringing voltage and extended loop reach. Consider its low power profile and minimal external component count for compact designs. Evaluate the integrated test features if diagnostic capabilities are required. Compare with other RSLIC-VoIP family members for specific voltage grades or balance requirements.

Telecom Part Context

The HC55185FCM belongs to the RSLIC-VoIP family of Ringing Subscriber Line Interface Circuits. This family offers five product variations, providing different voltage grades such as high battery voltage and longitudinal balance options. The design utilizes low fixed loop gains to achieve high analog performance and noise immunity.

Telecom Replacement Considerations

Consult the RSLIC-VoIP family datasheet for alternative part numbers within the same series that offer compatible voltage grades or package options. Verify functional equivalence regarding 100V operation and ringing waveform support before substitution.