參數(shù)資料
型號(hào)： LUCL8574DP-DT
英文描述： L8574D Resistive Subscriber Line Interface Circuit(SLIC), Ring Relay,and Protector(SRP)for Long Loop and TR-57 Applications
中文描述： L8574D電阻用戶(hù)線接口電路（SLIC），環(huán)繼電器和保護(hù)（SRP）的為遠(yuǎn)距離和TR - 57應(yīng)用
文件頁(yè)數(shù)： 2/36頁(yè)
文件大?。?/td> 489K
代理商： LUCL8574DP-DT
2
Lucent Technologies Inc.
Data Sheet
October 1998
Relay, and Protector (SRP) for Long Loop and TR-57 Applications
L8574D Resistive Subscriber Line Interface Circuit (SLIC), Ring
Table of Contents
Contents
Page
Features ....................................................................................................................................................................1
Description ................................................................................................................................................................1
Architectural Diagram................................................................................................................................................4
Pin Information ..........................................................................................................................................................4
Absolute Maximum Ratings.......................................................................................................................................6
Electrical Characteristics...........................................................................................................................................7
Ring Trip Detector ...................................................................................................................................................8
Battery Feed ...........................................................................................................................................................8
Fault Protection.......................................................................................................................................................9
Transmission Characteristics................................................................................................................................13
Data Interface and Logic.......................................................................................................................................14
Switch Characteristics...........................................................................................................................................15
Operating States......................................................................................................................................................16
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
Applications.............................................................................................................................................................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
dc Characteristics....................................................................................................................................................27
V-I Characteristics.................................................................................................................................................27
Loop Length..........................................................................................................................................................28
ac Design.................................................................................................................................................................28
Codec Features and Selection Summary.............................................................................................................28
Design Equations..................................................................................................................................................29
Application Diagram ................................................................................................................................................33
Outline Diagram.......................................................................................................................................................34
44-Pin PLCC.........................................................................................................................................................34
Ordering Information................................................................................................................................................35
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