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HC5521CQ Datasheet(PDF) 1 Page - Intersil Corporation |
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HC5521CQ Datasheet(HTML) 1 Page - Intersil Corporation |
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1 / 1 page SEMICONDUCT OR 4-35 ADVANCE INFORMATION January 1997 HC5521 SLIC Subscriber Line Interface Circuit Features • Normal and Reversed DC Feed • 30mA Current Limit • Ringing, Test-In, and Test-Out Relay Drivers • Ground Key Detector with Seperate Logic Output • 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 Applications • PABX/CO Line Circuits 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 comprehensive set of features for these applications including loop reversal, ground key detec- tion, 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 combined with a small 44 lead MQFP package allow significant board space to be freed up for additional line circuits. The HC5521 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. HC5521CQ 0 to 70 44 Ld MQFP Q44.10x10 HC5521CM 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 D6TAI D3PDI D4RCI D2PRI D5TBI GKDO SHDO CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright © Harris Corporation 1997 File Number 4265 |
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