參數(shù)資料
型號(hào)： L9218A
英文描述： CAP CER 330PF 3.15KVDC R3 RAD
中文描述： 低成本線接口
文件頁(yè)數(shù)： 16/30頁(yè)
文件大?。?/td> 378K
代理商： L9218A
16
Agere Systems Inc.
Data Sheet
November 2001
L9218A/G Low-Cost Line Interface
Applications
(continued)
Table 10. Parts List for Loop Start Application Circuit Using T7504-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 Profile
R
PROG
ac Characteristics
C
B1
C
B2
R
T1
R
RCV
R
GP
L9218
Agere L7591
Agere L7581/2/3 or EMR
T7504
Subscriber loop interface circuit (SLIC).
Secondary protection.
Switches ringing signals.
First-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
Sets dc loop current limit.
0.47
μ
F, 20%, 10 V
0.47
μ
F, 20%, 10 V
71.5 k
, 1%, 1/16 W
137 k
, 1%, 1/16 W
30.1 k
, 1%, 1/16 W
ac/dc separation capacitor.
ac/dc separation capacitor.
With R
GP
and R
RCV
, sets ac termination impedance.
With R
GP
and R
T1
, sets receive gain.
With R
T1
and R
RCV
, sets ac termination impedance
and receive gain.
With R
X
, sets transmit gain in codec.
With R
T2
, sets transmit gain in codec.
Sets hybrid balance.
With R
GS
, provides gain shaping for termination
impedance matching.
With C
GS
, provides gain shaping for termination
impedance matching.
Sets transmit gain of SLIC.
With R
N1
and R
N2
high frequency compensation.
With C
N
and R
N2
high frequency compensation.
With R
N1
and C
N
high frequency compensation.
R
T2
R
X
R
HB1
C
GS
80.6 k
, 1%, 1/16 W
158 k
, 1%, 1/16 W
357 k
, 1%, 1/16 W
6.8 nF, 10%, 10 V
R
GS
2.37 k
, 1%, 1/16 W
R
GP1
C
N
R
N1
R
N2
Supervision
R
LCTH
R
TS1
C
RTS1
R
TSN
R
TSP
8.06 k
, 1%, 1/16 W
0.1 nF, 20%, 10 V
143 k
,
1%, 1/16 W
18.2 k
,
1%, 1/16 W
22.1 k
, 1%, 1/16 W
402
, 5%, 2 W
0.015
μ
F, 20%, 10 V
3.32 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
, R
TSP
, forms filter pole.
With R
TSP
, sets threshold.
With C
RTS1
, R
TSN
, sets threshold.
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L9222-D 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:QUAD INVERTING TRANSISTOR SWITCH
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