HC5503C Data Sheet June 1998 File Number 4503 Unbalanced PBX/Key System SLIC, Subscriber Line Interface Circuit The Intersil HC5503C is a low cost Subscriber Line Interface Circuit (SLIC), that replaces the components of an unbalanced discrete Analog circuit design.
The monolithic integrated design provides improved performance and system reliability.
The SLIC provides: current limited DC feed to the subscriber loop, maintains a flat frequency response over the voice band and beyond, has self resetting thermal protection that allows conversation to continue while the fault is present, provides a TTL subscriber off-hook indication even in the presence of longitudinal currents, provides unbala...

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