CO/PABX Polarity Reversal Subscriber Line Interface Circuit

The HC5520 is a Monolithic Subscriber Line Interface Circuit (SLIC) for Analog Subscriber Line cards in Central Ofce and PABX switches. The HC5520 provides a comprehensive set of features for these applications including loop reversal, zero crossing ringing relay operation, long loop drive and a mutually inde- pendent setting of the receive and transmit gains, and the two wire impedance synthesis. Advanced power manage- ment features combined with a small 44 lead MQFP pack- age allow signicant board space to be freed up for additional line circuits. By Harris Corporation
HC5520 's PackagesHC5520 's pdf datasheet

HC5520 Pinout will be updated soon..., now you can download the pdf datasheet to check the pinouts !
HC5520 Application circuits
HC5520 circuits
This is one application circuit of HC5520,If you need more circuits,please download HC5520's pdf datasheet.

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