LUCL8574DP-D AGERE [Agere Systems], LUCL8574DP-D Datasheet - Page 2

• 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]

L8574D Resistive Subscriber Line Interface Circuit (SLIC), Ring
Relay, and Protector (SRP) for Long Loop and TR-57 Applications
Contents
Features ....................................................................................................................................................................1
Description ................................................................................................................................................................1
Architectural Diagram ................................................................................................................................................4
Pin Information ..........................................................................................................................................................4
Absolute Maximum Ratings.......................................................................................................................................6
Electrical Characteristics ...........................................................................................................................................7
Operating States......................................................................................................................................................16
Applications .............................................................................................................................................................18
dc Characteristics ....................................................................................................................................................27
ac Design.................................................................................................................................................................28
Application Diagram ................................................................................................................................................33
Outline Diagram.......................................................................................................................................................34
Ordering Information................................................................................................................................................35
2
Ring Trip Detector ...................................................................................................................................................8
Battery Feed ...........................................................................................................................................................8
Fault Protection .......................................................................................................................................................9
Transmission Characteristics ................................................................................................................................13
Data Interface and Logic.......................................................................................................................................14
Switch Characteristics...........................................................................................................................................15
Scan State ............................................................................................................................................................16
Disconnect State...................................................................................................................................................17
Alternate Talk State ...............................................................................................................................................17
Talk State ..............................................................................................................................................................17
Scan Current-Limit State.......................................................................................................................................17
Ringing State ........................................................................................................................................................17
On-Hook Transmission State ................................................................................................................................17
Intermediate Talk State .........................................................................................................................................18
General .................................................................................................................................................................18
Resistor Module ....................................................................................................................................................22
Protection..............................................................................................................................................................24
Tip/Ring Drivers ....................................................................................................................................................25
Receive Interface ..................................................................................................................................................25
Transmit Interface..................................................................................................................................................25
Battery Noise Cancellation ...................................................................................................................................25
On-Hook Transmission..........................................................................................................................................26
Parallel Data Interface...........................................................................................................................................26
Supervision ...........................................................................................................................................................26
Off-Hook Detection ...............................................................................................................................................26
Ring Trip ................................................................................................................................................................26
Thermal Shutdown................................................................................................................................................27
Relay Driver ..........................................................................................................................................................27
Solid-State Ringing Access...................................................................................................................................27
Battery Supplies....................................................................................................................................................27
V-I Characteristics.................................................................................................................................................27
Loop Length ..........................................................................................................................................................28
Codec Features and Selection Summary .............................................................................................................28
Design Equations..................................................................................................................................................29
44-Pin PLCC .........................................................................................................................................................34
Table of Contents
Lucent Technologies Inc.
October 1998
Data Sheet
Page