HC5520
Description
The HC5520 is a Monolithic Subscriber Line Interface Circuit (SLIC) for Analog Subscriber Line cards in Central Office and PABX switches.
Key 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
Applications
- CO/PABX Line Circuits RX TA TB TSDO SHDO PRI PDI RCI TBI TAI RING CONTROL RD RBH RBL CRTD BIAS BATTERY REFERENCE RPSB POWER MANAGEMENT RPSR RPST RPSG CP RDC CDC LOGIC HC5520 2-WIRE INTERFACE TIP TIPSEN RINGSEN RING TEST CONTROL 4-WIRE INTERFACE / Z0 TX TX4W RN KZO
