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L8574D - Resistive SLIC / Ring Relay and Protector

General Description

The L8574 is a resistive subscriber line interface circuit (SLIC) that is optimized for long loop applications, such as Bellcore TR-NWT-000057 requirements for digital loop carrier (DLC) applications.

Key Features

  • s Low-power scan mode for low on-hook power dissipation (55 mW max) s Low active power dissipation; talk or on-hook transmission (240 mW max) s Distortion-free on-hook transmission s Eight operating states via latched paralleled data inputs with channel select feature s Precision fixed 28 mA current limiter s Integrated protection s No external protection device required s Integrated ringing access relay s Ring trip detector s Loop closure detector with hysteresis s Relay driver s Battery noise c.

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Datasheet Details

Part number L8574D
Manufacturer Agere Systems
File Size 242.25 KB
Description Resistive SLIC / Ring Relay and Protector
Datasheet download datasheet L8574D Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Data Sheet October 1998 L8574D Resistive Subscriber Line Interface Circuit (SLIC), Ring Relay, and Protector (SRP) for Long Loop and TR-57 Applications Features s Low-power scan mode for low on-hook power dissipation (55 mW max) s Low active power dissipation; talk or on-hook transmission (240 mW max) s Distortion-free on-hook transmission s Eight operating states via latched paralleled data inputs with channel select feature s Precision fixed 28 mA current limiter s Integrated protection s No external protection device required s Integrated ringing access relay s Ring trip detector s Loop closure detector with hysteresis s Relay driver s Battery noise cancellation s Thermal protection s 44-pin, surface-mount, plastic package (PLCC) Description The L8574 is a resistive subscriber line int