L9214A/G
Low-Cost Ringing SLIC
Preliminary Data Sheet
October 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........................................................12
State Definitions ........................................................12
Forward Active (Fast Polarity Reversal) .................12
Off-hook................................................................12
On-hook................................................................12
Forward Active (Slow Polarity Reversal).................12
Off-hook................................................................12
On-hook................................................................12
Reverse Active (Fast Polarity Reversal) .................13
Off-hook................................................................13
On-hook................................................................13
Reverse Active (Slow Polarity Reversal) ................13
Off-hook................................................................13
On-hook................................................................13
Scan........................................................................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..............................................25
Overhead Voltage...................................................25
Active Mode .........................................................25
Scan Mode ...........................................................25
On-Hook Transmission Mode...............................25
Ring Mode............................................................26
Loop Range ........................................................... 26
Battery Reversal Rate............................................ 26
Supervision............................................................... 27
Loop Closure.......................................................... 27
Ring Trip ................................................................ 27
Tip or Ring Ground Detector.................................. 27
Power Ring ............................................................ 27
Periodic Pulse Metering (PPM) ................................ 29
ac Applications ......................................................... 29
ac Parameters........................................................ 29
Codec Types.......................................................... 29
First-Generation Codecs ..................................... 29
Third-Generation Codecs.................................... 29
ac Interface Network .............................................. 29
Design Examples................................................... 30
First-Generation Codec ac Interface
Network—Resistive Termination ...................... 30
Example 1, Real Termination.............................. 31
First-Generation Codec ac Interface
Network—Complex Termination....................... 34
Complex Termination Impedance Design
Example............................................................ 34
ac Interface Using First-Generation Codec......... 33
Transmit Gain...................................................... 35
Receive Gain....................................................... 36
Hybrid Balance.................................................... 36
Blocking Capacitors............................................. 37
Third-Generation Codec ac Interface
Network—Complex Termination....................... 40
Outline Diagram........................................................ 41
28-Pin SOG............................................................ 42
32-Pin PLCC .......................................................... 43
48-Pin MLCC.......................................................... 44
48-Pin MLCC, JEDEC MO-220 VKKD-2................ 45
Ordering Information................................................. 46
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Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
