LUCL8574DP-D AGERE [Agere Systems], LUCL8574DP-D Datasheet - Page 3

• Manufacturer Part Number: LUCL8574DP-D
• Description: L8574D Resistive Subscriber Line Interface Circuit(SLIC), Ring Relay,and Protector(SRP)for Long Loop and TR-57 Applications
• Manufacturer: AGERE [Agere Systems]

Data Sheet
October 1998
Lucent Technologies Inc.
Tables
Table 1. Pin Descriptions ........................................................................................................................................... 5
Table 2. Operating Conditions and Powering ............................................................................................................ 7
Table 3. Ring Trip Detector ........................................................................................................................................ 8
Table 4. Battery Feed ................................................................................................................................................ 8
Table 5. Electrical Characteristics of Pins PT, PR, and V
Table 6. Loss of Power Supplies.............................................................................................................................. 10
Table 7. Analog Signal Pins..................................................................................................................................... 11
Table 8. ac Transmission Characteristics................................................................................................................. 13
Table 9. Logic Inputs (CE, CS, and B0—B3) and Output NSTAT ............................................................................ 14
Table 10. Timing Requirements (B0—B3 and CS) .................................................................................................. 14
Table 11. Relay Driver (RDO) .................................................................................................................................. 14
Table 12. Battery Switch (SW1) and Ring Break Switch (SW2) .............................................................................. 15
Table 13. Ringing Access Switch (SW3) ................................................................................................................. 15
Table 14. Input State Coding ................................................................................................................................... 16
Table 15. External Components Required............................................................................................................... 20
Table 16. MMC A31A8574AA and MMC A11A8574AA Module.............................................................................. 23
Figures
Figure 1. Architectural Diagram................................................................................................................................. 4
Figure 2. Pin Layout .................................................................................................................................................. 4
Figure 3. Switch On-State V-I Characteristics SW1 and SW2................................................................................. 16
Figure 4. Switch On-State V-I Characteristics SW3................................................................................................. 16
Figure 5. External Components Required ............................................................................................................... 19
Figure 6. Resistor Network...................................................................................................................................... 23
Figure 7. L8574 SLIC Matching Requirements ....................................................................................................... 24
Figure 8. Implementing the Noise Cancellation Function........................................................................................ 25
Figure 9. Ring Trip Threshold .................................................................................................................................. 26
Figure 10. Loop Current vs. Loop Voltage ............................................................................................................... 28
Figure 11. Equivalent Complex Terminations .......................................................................................................... 29
Figure 12. Initial ac Interface for Complex Termination Between L8574 SLIC and T7504 Codec .......................... 30
Figure 13. Revised ac Interface C
Figure 14. Addition of Resistor R
Figure 15. TR-57 Application Diagram .................................................................................................................... 33
Relay, and Protector (SRP) for Long Loop and TR-57 Applications
SC
L8574D Resistive Subscriber Line Interface Circuit (SLIC), Ring
T
and C
from XMT to IRP ............................................................................................. 31
Table of Contents
R
Combined into a Single Capacitor C
BF
....................................................................................... 9
(continued)
S
................................................. 31
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