參數(shù)資料
型號： L9217A
英文描述： CAP CER 2700PF 3.15KVDC R3 RAD
中文描述： 低成本線接口，具有反向電池和PPM
文件頁數(shù)： 18/30頁
文件大小： 414K
代理商： L9217A
18
Agere Systems Inc.
Data Sheet
November 2001
with Reverse Battery and PPM
L9217A/G Low-Cost Line Interface
Applications
(continued)
Table 12. Parts List for Loop Start Application Circuit Using T8536-Type Codec
Name
Value
Function
Integrated Circuits
SLIC
Protector
Ringing Relay
Codec
Overvoltage Protection
R
PT
R
PR
Power Supply
C
BAT1
C
CC
C
F1
C
F2
dc Characteristics
R
PROG
ac Characteristics
C
B1
C
B
R
GP1
R
CIN
Supervision
R
LCTH
R
TS1
C
RTS1
R
TSN
R
TSP
Meter Pulse
C
HY
C
PPM
R
PPM
R
OVH
L9217
Agere L7591
Agere L7581/2/3 or EMR
T8536
Subscriber loop interface circuit (SLIC).
Secondary protection.
Switches ringing signals.
Third-generation codec.
50
, Fusible
50
, Fusible
Protection resistor.
Protection resistor.
0.1
μ
F, 20%, 100 V
0.1
μ
F, 20%, 10 V
0.47
μ
F, 20%, 100 V
0.1
μ
F, 20%, 100 V
V
BAT
filter capacitor.
V
CC
filter capacitor.
With C
F2
, improves idle-channel noise.
With C
F1
, improves idle-channel noise.
35.7 k
, 1%, 1/16 W
Set low current limit.
0.1
μ
F, 20%, 10 V
0.1
μ
F, 20%, 10 V
8.06 k
, 1%, 1/16 W
20 M
, 5%, 1/16 W
ac/dc separation capacitor.
dc blocking capacitor.
Sets dc transmit gain of SLIC.
dc bias.
22.1 k
, 1%, 1/16 W
510
, 5%, 2 W
0.015
μ
F, 20%, 10 V
3.4 M
, 1%, 1/16 W
2.94 M
, 1%, 1/16 W
Sets loop closure (off-hook) threshold.
Ringing source series resistor.
With R
TSN
and R
TSP
, forms second 2 Hz filter pole.
With R
TSP
, sets threshold.
With R
TSN
, sets threshold.
4.7 nF, 20%, 10 V
0.01
μ
F, 20%, 10 V
6.19 k
,
1%, 1/16 W
61.9 k
,
1%, 1/16 W
Meter pulse rejection.
Meter pulse injection.
Meter pulse rejection.
Increases PPM overhead mode.
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