ISL5585ECR

Telecom Overview

The ISL5585ECR is a member of the 3.3 Volt Ringing SLIC Family for Voice Over Broadband (VOB). It supports analog Plain Old Telephone Service (POTS) in short and medium loop length applications, including wireless and wireline voice over broadband systems. The device operates with a 100V ringing battery supply to extend subscriber loop lengths up to 500Ω. Key electrical characteristics include 3.3V VCC operation, low standby power consumption of 65mW at 75V, and a maximum noise level of 13 dBrnC. It features onboard ringing generation using sinusoidal or trapezoidal waveforms and integrated MTU DC characteristics.

Telecom Feature Summary

• Onboard ringing generation supporting sinusoidal or trapezoidal waveforms
• Low standby power consumption optimized for energy efficiency
• Programmable transient current limit for robust line protection
• Integrated MTU DC characteristics reducing external component count

Telecom Applications

• Voice Over Broadband (VOB) customer premise equipment
• Analog POTS support in wireless telephony systems
• Wireline voice over broadband subscriber interfaces
• Fiber In The Loop (FITL) markets requiring extended loop lengths

Telecom Procurement Notes

Verify the specific suffix 'ECR' against official Renesas/Intersil documentation to confirm package type and temperature range, as datasheets may list variations like CIMZ or FCMZ. Confirm end-of-life status and availability through authorized distributors, as discontinuance notifications exist for related PLCC packaged products. Ensure compliance with RoHS standards if required by the application design specifications.

Telecom Selection Notes

Select this component when designing systems requiring high ringing voltage capability with minimal external discrete components. It is suitable for applications needing extended subscriber loop lengths up to 500Ω. Consider the 3.3V VCC requirement and thermal shutdown features with alarm indicators for system reliability. Evaluate the trade-off between low standby power and the need for robust auto-detection mechanisms for on-hook/off-hook states.

Telecom Part Context

The ISL5585ECR belongs to the ISL5585 family of Ringing Subscriber Line Interface Circuits (RSLICs) manufactured by Intersil, now part of Renesas. This family is designed specifically for Voice Over Broadband applications, offering flexibility for designers with high ringing voltage and low power consumption requirements. The devices are available in surface mount packaging options such as QFN and PLCC to improve PCB efficiency.

Telecom FAQ

What types of ringing waveforms does the ISL5585ECR support?

The device supports both sinusoidal and trapezoidal ringing waveforms for generating ringing signals.

How does the ISL5585ECR handle subscriber line detection?

It features robust auto-detection mechanisms to identify when subscribers go on-hook or off-hook.

What is the maximum operating voltage for the ringing battery supply?

The family is capable of operating with a 100V ringing battery supply.