LUCL9312GP-D datasheet(2/40 Pages) AGERE

Part #	LUCL9312GP-D

Description	Line Interface and Line Access Circuit Forward Battery SLIC and Ringing Relay for TR-57 Applications

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Manufacturer	AGERE [Agere Systems]

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Data Sheet

July 2001

Forward Battery SLIC and Ringing Relay for TR-57 Applications

L9312 Line Interface and Line Access Circuit

2

Agere Systems Inc.

Table of Contents

Contents

Page

Introduction..................................................................1

Features ....................................................................1

SLIC .......................................................................1

Solid-State Relay....................................................1

Applications...............................................................1

Description ................................................................1

Features ......................................................................4

Description...................................................................4

Architecture .................................................................7

Pin Information ............................................................8

Operating States........................................................10

Input State Coding ..................................................10

State Definitions ........................................................11

Primary Control Modes ...........................................11

Powerup, Forward Battery....................................11

Scan .....................................................................11

Ringing .................................................................11

Disconnect—Break Before Make .........................11

Reset ....................................................................11

Special States .........................................................11

Thermal Shutdown ...............................................11

Battery Out of Range ...........................................12

Absolute Maximum Ratings ......................................12

Electrical Characteristics ...........................................13

Ring Trip Detector ...................................................14

SLIC Two-Wire Port ................................................15

Analog Pin Characteristics ......................................16

ac Feed Characteristics ..........................................17

Logic Inputs and Outputs, VDD = 5.0 V ...................18

Timing Requirements ..............................................18

Switch Characteristics.............................................19

On-State Switch I-V Characteristics........................20

Test Configurations ...................................................21

Applications ...............................................................23

dc Characteristics ...................................................23

Power Control.......................................................23

Power Derating.....................................................23

Automatic Battery Switch .....................................24

Contents

Page

Power Control Resistor ....................................... 24

Overhead Voltage ............................................... 25

dc Loop Current Limit .......................................... 26

Loop Range......................................................... 26

Battery Feed ........................................................ 26

Longitudinal to Metallic Balance.......................... 27

Supervision ............................................................... 27

Loop Closure.......................................................... 27

Ring Trip ................................................................ 28

Switching Behavior................................................. 28

Make-Before-Break Operation ............................... 28

Break-Before-Make Operation ............................... 29

Protection ................................................................. 29

External Protection................................................. 29

Active Mode Response at PT/PR........................... 29

Ring Mode Response at PT/PR ............................. 30

Internal Tertiary Protection..................................... 31

Diode Bridge........................................................ 31

Battery Out of Range Detector: High

(Magnitude) ................................................. 31

Battery Out of Range Detector: Low

(Magnitude) ................................................. 31

ac Applications ......................................................... 32

ac Parameters........................................................ 32

Codec Types .......................................................... 32

ac Interface Network .............................................. 32

Design Tools .......................................................... 33

First-Generation Codec ac Interface Network........ 33

First-Generation Codec ac Interface

Network: Resistive Termination ............................ 34

Example 1, Real Termination .............................. 35

Third-Generation Codec ac Interface

Network: Complex Termination ............................ 38

Outline Diagram........................................................ 40

Ordering Information................................................. 40

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