參數(shù)資料
型號： LUCL9217GAR-D
英文描述： Aluminum Snap-In Capacitor; Capacitance: 10000uF; Voltage: 25V; Case Size: 25x30 mm; Packaging: Bulk
中文描述： 低成本線接口，具有反向電池和PPM
文件頁數(shù)： 2/30頁
文件大小： 414K
代理商： LUCL9217GAR-D
2
Agere Systems Inc.
Data Sheet
November 2001
with Reverse Battery and PPM
L9217A/G Low-Cost Line Interface
Features ......................................................................1
Description...................................................................1
Pin Information ............................................................4
Functional Description.................................................6
Absolute Maximum Ratings (at TA = 25
°
C)................7
Recommended Operating Conditions .........................7
Electrical Characteristics.............................................8
Ring Trip Requirements..........................................12
Test Configurations ...................................................13
Applications...............................................................15
dc Applications........................................................19
Battery Feed.........................................................19
Overhead Voltage ................................................19
Rate of Battery Reversal......................................20
Loop Range..........................................................20
Off-Hook Detection...............................................20
Ring Trip Detection...............................................21
Longitudinal Balance...............................................21
Periodic Pulse Metering (PPM)...............................22
ac Design................................................................23
Codec Types........................................................23
ac Interface Network ............................................23
Receive Interface .................................................23
Example 1: Real Termination (First-
Generation Codec)...............................................24
Example 2: Complex Termination (First-
Generation Codec)...............................................26
Power Derating.......................................................28
Pin-for-Pin Compatibility with L9218/L9219............28
PCB Layout Information ............................................28
Outline Diagram.........................................................29
28-Pin PLCC...........................................................29
Ordering Information..................................................30
Figures
Page
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10. ac Gains..................................................14
Figure 11. Basic Loop Start Application
Circuit Using T7504-Type Codec............15
Figure 12. Basic Loop Start Application
Circuit Using T8536-Type Codec............17
Functional Diagram...................................3
28-Pin PLCC.............................................4
Ring Trip Circuits....................................12
L9217 Basic Test Circuit.........................13
Metallic PSRR.........................................13
Longitudinal PSRR .................................13
Longitudinal Balance ..............................14
RFI Rejection..........................................14
Longitudinal Impedance..........................14
Figure 13. Loop Current vs. Loop Voltage.............. 19
Figure 14. Off-Hook Detection Circuit..................... 20
Figure 15. Ring Trip Equivalent Circuit
and Equivalent Application .................... 21
Figure 16. ac Equivalent Circuit.............................. 24
Figure 17. Interface Circuit Using First-
Generation Codec (±5 V Codec) ........... 27
Figure 18. Interface Circuit Using First-
Generation Codec (5 V Only Codec)..... 27
Tables
Page
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Pin Descriptions ..................................... 4
Input State Coding .................................. 6
Supervision Coding ................................. 6
Power Supply .......................................... 8
2-Wire Port .............................................. 9
Analog Pin Characteristics .................... 10
PPM ...................................................... 10
ac Feed Characteristics ........................ 11
Logic Inputs and Outputs ...................... 12
Parts List for Loop Start Application
Circuit Using T7504-Type Codec .......... 16
900 W Termination, 850 W + 50 nF
Hybrid First-Generation Codec Design
Parameters ........................................... 17
Parts List for Loop Start Application
Circuit Using T8536-Type Codec .......... 18
FB1/FB2 Values vs. Typical Ramp
Time ...................................................... 20
Table 11.
Table 12.
Table 13.
Table of Contents
Contents
Page
Figures
Page
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LUCL9217GAR-DT 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and PPM
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