HC5520 circuit equivalent, co/pabx polarity reversal subscriber line interface circuit.
for these applications including loop reversal, zero crossing ringing relay operation, long loop drive and a mutually independent setting of the receive and transmit gain.
including loop reversal, zero crossing ringing relay operation, long loop drive and a mutually independent setting of th.
The HC5520 is a Monolithic Subscriber Line Interface Circuit (SLIC) for Analog Subscriber Line cards in Central Office and PABX switches. The HC5520 provides a comprehensive set of features for these applications including loop reversal, zero crossing.
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