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HC5520 Datasheet(PDF) 1 Page - Harris Corporation |
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HC5520 Datasheet(HTML) 1 Page - Harris Corporation |
1 / 20 page SEMICONDUCT OR 1 April 1997 HC5520 CO/PABX Polarity Reversal Subscriber Line Interface Circuit Features • Normal and Reversed DC Feed • Current Limited Loop Feed • Ringing, Test-In, and Test-Out Relay Drivers • Thermal Shutdown Protection with Alert Signal • On-Hook Transmission • Selectable Transmit and Receive Gain Setting • Selectable 2-Wire Impedance Matching • Zero Crossing Ring Trip Detection and Ring Relay Release • Parallel Digital Control and Status Monitoring • Protection Resistors Inside Feedback Loop Allows the Use of PTC Devices Without Impact on Longitudinal Balance • Thermal Management Features Applications • CO/PABX Line Circuits Description 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 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 significant board space to be freed up for additional line circuits. The HC5520 is fabricated in a Harris state-of-the-art Bonded Wafer High Voltage process, providing freedom from tradi- tional JI latch-up phenomena without the use of additional power supply filtering components or substrate tie connec- tions. The very low parasitics and leakages associated with this process provide an exceptionally flat performance over frequency and temperature. Block Diagram Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. HC5520CQ 0 to 70 44 Ld MQFP Q44.10x10 HC5520CM 0 to 70 44 Ld PLCC N44.65 TIP TIPSEN TEST CONTROL 2-WIRE INTERFACE RING CONTROL AGND BIAS RINGSEN RING RX RN TX TX4W TA TB RBL RBH RD CRTD POWER MANAGEMENT RPSB RPST RPSG RGND BGND VCC CDC VEE CP VBAT RDC RPSR BATTERY REFERENCE 4-WIRE INTERFACE / Z0 KZO LOGIC TAI PDI RCI PRI TBI TSDO SHDO HC5520 CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright © Harris Corporation 1997 File Number 4148.2 |
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