參數(shù)資料
型號(hào)： L9216A
英文描述： CAP CER 270PF 3.15KVDC R3 RAD
中文描述： 短環(huán)振鈴用戶接口與地面開始
文件頁(yè)數(shù)： 2/48頁(yè)
文件大?。?/td> 1062K
代理商： L9216A
Preliminary Data Sheet
September 2001
Short-Loop Ringing SLIC with Ground Start
L9216A/G
2
Agere Systems Inc.
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 (@ T
A
= 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 V
CC
Operation................................................29
3.3 V V
CC
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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