The HC-5504B is a monolithic integrated device designed for use in digital PBX systems. It incorporates many BORSHT functions, including DC battery feed, ring relay driver, supervisory, and hybrid functions.
Key features include:
Pin for Pin Replacement
Capable of 5V or 12V operation, with a high voltage process compatible with worldwide PBX performance requirements.
Power Management
Controlled supply of battery feed current for short loops (41mA), with low power consumption during standby.
Protection Features
Selective denial of power to subscriber loops, with internal ring relay driver and switch hook ground key and ring trip detection functions.
The device is available in a 24-lead SOIC package and is Pb-free.
Manual:
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