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LUCL8560DAU-DT Datasheet(PDF) 2 Page - Agere Systems |
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LUCL8560DAU-DT Datasheet(HTML) 2 Page - Agere Systems |
2 / 46 page Data Sheet April 2000 L8560 Low-Power SLIC with Ringing 2 Lucent Technologies Inc. Table of Contents Contents Page Features .................................................................... 1 Description ................................................................. 1 Pin Information ........................................................... 6 Functional Description ................................................ 9 Absolute Maximum Ratings ..................................... 10 Recommended Operating Conditions ...................... 11 Electrical Characteristics .......................................... 11 Ring Trip Requirements ......................................... 16 Test Configurations .................................................. 17 Applications ............................................................. 19 Characteristic Curves............................................. 19 dc Applications ...................................................... 21 Battery Feed...................................................... 21 Overhead Voltage ............................................ 22 Adjusting Overhead Voltage ............................. 23 Adjusting dc Feed Resistance........................... 23 Adjusting Overhead Voltage and dc Feed Resistance Simultaneously.............................. 24 Loop Range....................................................... 24 Off-Hook Detection ........................................... 24 Ring Ground Detection...................................... 25 Longitudinal Balance.............................................. 25 Power Derating ..................................................... 25 Battery Switch ....................................................... 26 VCC/VEE Supplies ................................................... 27 Power Ringing ....................................................... 27 Ringing SLIC Balanced Ring Signal Generation ....................................................... 27 POTS for ISDN Terminal Adapters ................... 27 Contents Page Power Ringing Load .......................................... 28 Crest Factor....................................................... 28 Current-Limit Switch .......................................... 29 Ring Trip ............................................................ 29 Reference Designs for ISDN TA Applications ... 31 Design Considerations .......................................... 33 Unbalanced Bused Ring Signal Application ...... 33 Ring Trip Detection............................................ 33 ac Design .............................................................. 37 First-Generation Codecs ................................... 37 Second-Generation Codecs .............................. 37 Third-Generation Codecs .................................. 37 Design Examples ................................................... 39 Example 1, Real Termination ............................ 39 Example 2, Complex Termination ..................... 39 Example 3, Complex Termination Without Spare Op Amp ................................................. 39 Complex Termination Impedance Design Example Using L8560 Without Spare Op Amp ............................................................ 40 ac Interface Using First-Generation Codec ....... 40 Transmit Gain .................................................... 41 Receive Gain ..................................................... 42 Hybrid Balance .................................................. 42 Blocking Capacitors........................................... 43 Outline Diagrams...................................................... 44 32-Pin PLCC ......................................................... 44 44-Pin PLCC ......................................................... 45 Ordering Information................................................. 46 |
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