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