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L9216G Datasheet PDF : 48 Pages
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L9216A/G
Short-Loop Ringing SLIC with Ground Start
Preliminary Data Sheet
September 2001
Table of Contents
Contents
Page
Introduction ..................................................................1
Features ....................................................................1
Applications...............................................................1
Description ................................................................1
Features ......................................................................4
Description...................................................................4
Architecture Diagram...................................................7
Pin Information ............................................................8
Operating States .......................................................10
State Definitions ........................................................11
Forward Active ........................................................11
Reverse Active........................................................11
Scan ........................................................................11
On-Hook Transmission—Forward Battery ..............11
On-Hook Transmission—Reverse Battery ..............11
Disconnect ..............................................................11
Ring.........................................................................11
Ground Start ...........................................................11
Thermal Shutdown..................................................12
Absolute Maximum Ratings (@ TA = 25 °C) ..............12
Electrical Characteristics ...........................................13
Test Configurations ...................................................20
Applications ...............................................................22
Power Control .........................................................22
dc Loop Current Limit..............................................23
Overhead Voltage ...................................................23
Active Mode .........................................................23
Scan Mode ...........................................................23
On-Hook Transmission Mode...............................23
Ring Mode............................................................24
Loop Range ............................................................24
Battery Reversal Rate .............................................24
Supervision ................................................................24
Loop Closure...........................................................24
Ring Trip .................................................................24
Tip or Ring Ground Detector ...................................24
Power Ring .............................................................25
Sine Wave Input Signal and Sine Wave
Power Ring Signal Output .................................26
PWM Input Signal and Sine Wave Power
Ring Signal Output.............................................28
5 V VCC Operation ................................................29
3.3 V VCC Operation .............................................30
Square Wave Input Signal and Trapezoidal
Power Ring Signal Output .................................30
Contents
Page
ac Applications ......................................................... 32
ac Parameters........................................................ 32
Codec Types .......................................................... 32
First-Generation Codecs ..................................... 32
Third-Generation Codecs .................................... 32
ac Interface Network .............................................. 32
Design Examples ................................................... 34
First-Generation Codec ac Interface
Network—Resistive Termination ...................... 34
Example 1, Real Termination .............................. 34
First-Generation Codec ac Interface
Network—Complex Termination ....................... 37
Complex Termination Impedance Design
Example............................................................ 37
ac Interface Using First-Generation Codec ......... 37
Transmit Gain...................................................... 38
Receive Gain....................................................... 39
Hybrid Balance .................................................... 39
Blocking Capacitors ............................................ 40
Third-Generation Codec ac Interface
Network—Complex Termination ....................... 42
Outline Diagrams...................................................... 44
28-Pin PLCC .......................................................... 44
48-Pin MLCC.......................................................... 45
48-Pin MLCC, JEDEC MO-220 VKKD-2................ 46
Ordering Information ................................................ 47
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Agere Systems Inc.
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