The HC5523 is a subscriber line interface circuit which is interchangeable with Ericsson’s PBL3764A/4 for distributed central office applications. Enhancements include immunity to circuit latch-up during hot plug and absence of false signaling in the presence of longitudinal currents.

Features

• DI Monolithic High Voltage Process

• Programmable Current Feed (20mA to 60mA)

• Programmable Loop Current Detector Threshold and Battery Feed Characteristics

• Ground Key and Ring Trip Detection

• Compatible with Ericsson’s PBL3764A/4

• Thermal Shutdown

• On-Hook Transmission

• Wide Battery Voltage Range (-24V to -58V)

• Low Standby Power

• Meets TR-NWT-000057 Transmission Requirements

• -40°C to 85°C Ambient Temperature Range

Applications

• Digital Loop Carrier Systems

• Pair Gain

• Fiber-In-The-Loop ONUs

• POTS

• Wireless Local Loop

• PABX

• Hybrid Fiber Coax

• Related Literature

    - AN9632, Operation of the HC5523/15 Evaluation Board