Preliminary Data Sheet

September 2001

High-Voltage Ringing SLIC for VoIP Applications

L9500A

2

Agere Systems Inc.

Table of Contents

Contents

Page

L9500A Introduction ..................................................................................................................................................1

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

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

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

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

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

Architecture Diagram .................................................................................................................................................6

Pin Information ..........................................................................................................................................................7

Operating States........................................................................................................................................................9

State Definitions ......................................................................................................................................................10

Forward Active ......................................................................................................................................................10

Reverse Active ......................................................................................................................................................10

Scan ......................................................................................................................................................................10

On-Hook Transmission—Forward Battery ............................................................................................................10

On-Hook Transmission—Reverse Battery ............................................................................................................10

Disconnect ............................................................................................................................................................10

Ring.......................................................................................................................................................................10

Ground Start .........................................................................................................................................................10

Thermal Shutdown ................................................................................................................................................10

Absolute Maximum Ratings (@ TA = 25 °C) ............................................................................................................11

Electrical Characteristics .........................................................................................................................................12

Test Configurations .................................................................................................................................................19

Applications .............................................................................................................................................................21

Power Control .......................................................................................................................................................21

dc Loop Current Limit............................................................................................................................................22

Overhead Voltage .................................................................................................................................................22

Active Mode .......................................................................................................................................................22

Scan Mode .........................................................................................................................................................22

On-Hook Transmission Mode.............................................................................................................................22

Ring Mode ..........................................................................................................................................................22

Loop Range ..........................................................................................................................................................22

Battery Reversal Rate ...........................................................................................................................................23

Supervision ...........................................................................................................................................................23

Loop Closure.........................................................................................................................................................23

Ring Trip ...............................................................................................................................................................23

Ground Start .........................................................................................................................................................23

Power Ring ...........................................................................................................................................................24

Sine Wave Input Signal and Sine Wave Power Ring Signal Output ..................................................................24

ac Applications ........................................................................................................................................................25

ac Parameters.......................................................................................................................................................25

Design Examples ..................................................................................................................................................26

First-Generation Codec ac Interface Network—Resistive Termination..............................................................26

Broadcom 3352 Interface Network........................................................................................................ .............26

Outline Diagrams.....................................................................................................................................................28

28-Pin PLCC .........................................................................................................................................................28

48-Pin MLCC ........................................................................................................................................................29

48-Pin MLCC, JEDEC MO-220 VKKD-2...............................................................................................................30

Ordering Information ...............................................................................................................................................31