L9215A/G
Short-Loop Sine Wave Ringing SLIC
Data Sheet
September 2001
Table of Contents
Contents
Page
Contents
Page
Introduction..................................................................1
Features....................................................................1
Applications...............................................................1
Description................................................................1
Features ......................................................................4
Description...................................................................4
Architecture Diagram...................................................7
Pin Information ............................................................8
Operating States........................................................11
State Definitions ........................................................12
Forward Active........................................................12
Reverse Active........................................................12
Forward Active with PPM........................................12
Reverse Active with PPM........................................12
Scan........................................................................12
On-Hook Transmission—Forward Battery..............12
On-Hook Transmission with PPM—Forward
Loop Range ........................................................... 26
Battery Reversal Rate............................................ 26
Supervision............................................................... 27
Loop Closure.......................................................... 27
Ring Trip ................................................................ 27
Tip or Ring Ground Detector.................................. 27
Power Ring ............................................................ 27
Sine Wave Input Signal and Sine Wave Power
Ring Signal Output............................................ 28
PWM Input Signal and Sine Wave Power
Ring Signal Output............................................ 30
5 V VCC Operation ............................................... 31
3.3 V VCC Operation ............................................ 32
Square Wave Input Signal and Trapezoidal
Power Ring Signal Output ................................ 32
Periodic Pulse Metering (PPM) ................................ 34
ac Applications ......................................................... 34
ac Parameters........................................................ 34
Codec Types.......................................................... 34
First-Generation Codecs ..................................... 34
Third-Generation Codecs.................................... 34
ac Interface Network .............................................. 34
Design Examples................................................... 35
First-Generation Codec ac Interface
Battery....................................................................13
On-Hook Transmission—Reverse Battery..............13
On-Hook Transmission with PPM—Reverse
Battery....................................................................13
Disconnect ..............................................................13
Ring.........................................................................13
Thermal Shutdown..................................................13
Absolute Maximum Ratings.......................................14
Electrical Characteristics ...........................................15
Test Configurations ...................................................22
Applications ...............................................................24
Power Control .........................................................24
dc Loop Current Limit..............................................24
Overhead Voltage...................................................25
Active Mode .........................................................25
On-Hook Transmission Mode...............................26
Scan Mode ...........................................................26
Ring Mode............................................................26
Network—Resistive Termination ...................... 35
Example 1, Real Termination.............................. 36
First-Generation Codec ac Interface
Network—Complex Termination....................... 39
Complex Termination Impedance Design
Example............................................................ 39
ac Interface Using First-Generation Codec......... 39
Set ZTG—Gain Shaping....................................... 39
Transmit Gain...................................................... 40
Receive Gain....................................................... 41
Hybrid Balance.................................................... 41
Blocking Capacitors............................................. 42
Third-Generation Codec ac Interface
Network—Complex Termination....................... 45
Outline Diagrams...................................................... 47
32-Pin PLCC .......................................................... 47
48-Pin MLCC.......................................................... 48
48-Pin MLCC, JEDEC MO-220 VKKD-2................ 49
Ordering Information................................................. 50
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Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
