HC5521 Datasheet | Intersil

S E M I C O N D U C T O R SLIC Subscriber Line Interface Circuit Description The HC5521 is a Monolithic Subscriber Line Interface Circuit (SLIC) for Analog Subscriber Line cards in Central Office and PABX switches. The HC5521 provides a prehensive set of Features for these applications including loop reversal, ground key detection, zero crossing ring relay operation, long loop drive and a mutually independent setting of the receive and transmit gains, and the two-wire impedance synthesis. An option is also provided for eliminating transhybrid balance on-chip. Advanced power management Features bined with a small 44 lead MQFP package allow significant board space to be freed up...