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參數(shù)資料
| 型號： | L3235T |
| 英文描述： | Subscriber Line Interface Circuit |
| 中文描述： | 用戶線接口電路 |
| 文件頁數(shù)： | 6/26頁 |
| 文件大?。?/td> | 457K |
| 代理商： | L3235T |
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5
7
RO1
RO2
OUT1
2
OUT2
CS
CO1
CO2
CS
LINE FEEDER
L3235
GND
-VBAT
TIP
RING
LINE TERMINALS
A
B
VA
RINGING INJECTOR
L3234
6
4
3
1
CA
VA
C100
CVCC
VCC
GND
V100
+5V
GND
+100V
D94TL132
Figure3:
L3234/L3235Circuit Configuration
When the ringing function is selected by the sub-
scriber card, a low level signal is continuously ap-
plied to pin 1 througha de couplingcapacitor.Then
thelogical ring drive signal CS provided byL3235is
appliedto pin2 with a cadencedmode.
The ringing cycles are synchronised by the L3234
in such a way that the ringing starts and stops al-
ways whenthe analoginput signalcrosses zero.
When the ringing injection is enabled (CS = ”1”),
an AC ringing signal is injected in a balanced
modeinto thetelephone line.
When the ringing injection is disabled (CS = ”0”),
the output voltage on OUT2 raises to the high
power supply, whereas on OUT1, it falls down to
ground.
The L3234 has a low output impedance when
sending the signal, and high output impedance
when the ringing signal is disabled
In fig. 4 the dynamic features of L3234 are
shown.
OPERATIONDESCRIPTION
The Fig.3 show the simplified circuit configuration
of the L3234 Solid State Ringing injector when
used with the L3235 Line Feeder.
EXTERNAL COMPONENTS LIST
In the followingtable are shown the recommended externalcomponentsvalues for L3234.
Ref.
Value
82
Involved Parameter or Function
R01, R02
C01, C02
CA
C100
CV
CC
Ringing Feeding Series Resistors
Ringing Feeding De coupling Capacitors
Low LevelRinging Signal De coupling Capacitor
Positive Battery Filter
+5V Supply Filter
10
μ
F - 160V
4.7
μ
F - 10V
100nF - 100V
100nF
L3234 - L3235
6/26
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相關(guān)代理商/技術(shù)參數(shù) |
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| L-323GD | 制造商:Kingbright Corporation 功能描述: |
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