The HC5526 is a subscriber line interface circuit that is compliant with CCITT standards. 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 PBL3764

• Thermal Shutdown

• On-Hook Transmission

• Wide Battery Voltage Range . . . . . . . . . . . . . -24V to -58V

• Low Standby Power

• Meets CCITT Transmission Requirements

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

Applications

• On-Premises (ONS)

• Key Systems

• PBX

• Related Literature

- AN9537, Operation of the HC5513/26 Evaluation Board