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

Applications
• On-Premises (ONS)
• Key Systems
• PBX
• Related Literature
    - AN9537, Operation of the HC5513/26 Evaluation Board