LE79489DJC

Telecom Overview

The LE79489DJC is a Subscriber Line Interface Circuit (SLIC) from the Ve580 Series, designed for low-power applications. It operates with battery supplies ranging from –20 V to –60 V and features automatic on-chip battery switching between VBAT1 and VBAT2. The device integrates programmable current limiting, resistive feed control, and loop-detect thresholds. Key electrical parameters include a longitudinal balance of 60 dB and an insertion loss of ±0.15 dB at 1 kHz. It supports polarity reversal, ground-start capability, and includes on-chip thermal shutdown and management circuits.

Telecom Feature Summary

• Integrates automatic battery switching and on-chip thermal management with thermal shutdown protection.
• Features programmable DC feed resistance, current limits, and loop-detect thresholds via external components.
• Includes built-in ring and test relay drivers with snubber circuits and a comparator for ring-trip detection.

Telecom Applications

• Subscriber line interface circuits in telecommunications equipment
• Low power sensitive telephony applications
• Metering applications with selectable overhead

Telecom Procurement Notes

Verify the specific ordering suffix against the manufacturer's valid combinations list to confirm package type and temperature range. Confirm availability status directly with Zarlink sales or authorized distributors, as standard products may have limited stock or require special orders. Ensure compliance with environmental directives such as RoHS if applicable to the specific green package variant.

Telecom Selection Notes

Select the LE79489DJC for applications requiring 60 dB longitudinal balance and full transmission polarity reversal. The 'D' suffix indicates a green package, and 'J' denotes the 32-pin PLCC form factor. Verify that the operating temperature range meets the system requirements, as commercial devices are characterized over specific ambient ranges. Consider external programming networks for RDC, RD, and TMG pins to tailor performance.

Telecom Part Context

The LE79489 is part of the Ve580 Series of Subscriber Line Interface Circuits manufactured by Zarlink Semiconductor Inc. This series is designed to provide comprehensive line interface functions including signaling, speech path, and power feeding in a single integrated circuit. The device is intended for use in central office and remote terminal equipment.

Telecom Replacement Considerations

Parts marked with the "Am" prefix are equivalent in form, fit, and function to those with the "Le" prefix. Contact the manufacturer to confirm availability of specific valid combinations and additional data on military-grade products if required.