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LUCL8560DAU-D Datasheet(PDF) 3 Page - Agere Systems |
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LUCL8560DAU-D Datasheet(HTML) 3 Page - Agere Systems |
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3 / 46 page  Data Sheet April 2000 Lucent Technologies Inc. 3 L8560 Low-Power SLIC with Ringing Table of Contents (continued) Figures Page Figure 1. Functional Diagram ..................................... 5 Figure 2. 32-Pin Diagram (PLCC Chip) ...................... 6 Figure 3. 44-Pin Diagram (PLCC Chip) ...................... 6 Figure 4. Ring Trip Circuits....................................... 16 Figure 5. Basic Test Circuit ...................................... 17 Figure 6. Metallic PSRR ........................................... 17 Figure 7. Longitudinal PSRR .................................... 17 Figure 8. Longitudinal Balance ................................. 18 Figure 9. RFI Rejection............................................. 18 Figure 10. Longitudinal Impedance .......................... 18 Figure 11. ac Gains .................................................. 18 Figure 12. L8560 Receive Gain and Hybrid Balance vs. Frequency .......................... 19 Figure 13. L8560 Transmit Gain and Return Loss vs. Frequency ........................................ 19 Figure 14. L8560 Typical VCC Power Supply Rejection ................................................ 19 Figure 15. L8560 Typical VBAT Power Supply Rejection ................................................ 19 Figure 16. Loop Closure Program Resistor Selection ................................................ 20 Figure 17. Ring Ground Detection Programming ..... 20 Figure 18. Loop Current vs. Loop Voltage................ 20 Figure 19. Loop Current vs. Loop Resistance .......... 20 Figure 20. L8560 Typical SLIC Power Dissipation vs. Loop Resistance............................... 21 Figure 21. Power Derating........................................ 21 Figure 22. Loop Current vs. Loop Voltage................ 21 Figure 23. SLIC 2-Wire Output Stage ....................... 23 Figure 24. Equivalent Circuit for Adjusting the Overhead Voltage .................................. 23 Figure 25. Equivalent Circuit for Adjusting the dc Feed Resistance ............................... 23 Figure 26. Adjusting Both Overhead Voltage and dc Feed Resistance ............................... 24 Figure 27. Off-Hook Detection Circuit....................... 24 Figure 28. POTS Controlled from an ISDN Terminal Adapter ................................... 28 Figure 29. Ringing Waveform Crest Factor = 1.6 ..... 28 Figure 30. Ringing Waveform Crest Factor = 1.2 ..... 28 Figure 31. Equivalent Ring Trip Circuit for Balanced Ringing SLIC ......................... 29 Figure 32. Thevenin Equivalent Ring Trip Circuit for Balanced Ringing SLIC..................... 29 Figure 33. POTS Interface with Balanced Ringing Using L8560 SLIC and T8503 Codec .... 31 Figure 34. Ring Trip Equivalent Circuit and Equivalent Application ........................... 33 Figure 35. Basic Loop Start Application Circuit Using T7504 Codec and Bused Ringing ................................................... 34 Figure 36. Ground Start Application Circuit .............. 35 Figure 37. ac Equivalent Circuit Not Including Spare Op Amp ....................................... 38 Figure 38. ac Equivalent Circuit Including Spare Op Amp .................................................. 38 Figure 39. Interface Circuit Using First-Generation Codec (Blocking Capacitors Not Shown) ................................................... 41 Figure 40. ac Interface Using First-Generation Codec (Including Blocking Capacitors) for Complex Termination Impedance ..... 43 Tables Page Table 1. L8560 Product Family Feature Summary ..... 4 Table 2. Pin Descriptions............................................ 7 Table 3. Input State Coding ........................................ 9 Table 4. Supervision Coding ...................................... 9 Table 5. Power Supply ............................................. 12 Table 6. 2-Wire Port ................................................. 13 Table 7. Analog Pin Characteristics ......................... 14 Table 8. Uncommitted Op Amp Characteristics (44-Pin PLCC Only).......... 14 Table 9. ac Feed Characteristics .............................. 15 Table 10. Logic Inputs and Outputs.......................... 16 Table 11. Parts List for Balanced Ringing Using T8503 Codec .......................................... 32 Table 12. Parts List for Loop Start with Bused Ringing and Ground Start Applications .. 35 Table 13. 600 Ω Design Parameters ........................ 37 |
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