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参数资料
| 型号： | PBL386302QNS |
| 厂商： | ERICSSON |
| 英文描述： | Subscriber Line Interface Circuit |
| 中文描述： | 用户线接口电路 |
| 文件页数： | 14/16页 |
| 文件大小： | 134K |
| 代理商： | PBL386302QNS |
PBL 386 30/2
14
Analog Temperature Guard
The widely varying environmental condi-
tions in which SLICs operate may lead to
the chip temperature limitations being ex-
ceeded. The PBL 386 30/2 SLIC reduce
the dc line current when the chip tempera-
ture reaches approximately 145
°
C and in-
creases it again automatically when the
temperature drops. Accordingly transmis-
sion is not lost under high ambient tem-
perature conditions.
The detector output, DET, is forced to a
logic low level when the temperature guard
is active.
Loop Monitoring Functions
The loop current and ring trip detector
report their status through a common out-
put, DET. The detector to be connected to
DET is selected via the two bit wide control
interface C1 and C2. Please refer to sec-
tion Control Inputs for a description of the
control interface.
Loop Current Detector
The loop current detector is indicating
that the telephone is off hook and that
current is flowing in the loop by putting the
output DET to a logical low level when
selected.The loop current threshold value,
I
, at which the loop current detector
changes state is programmable by select-
ing the value of resistor R
. R
connects
between pin PLD and ground and is calcu-
lated according to
R
= 500
I
LTh
The current detector is internally filtered
and is not influenced by the ac signal at the
two wire side.
Ring Trip Detector
Ring trip detection is accomplished by con-
necting an external network to a compara-
tor in the SLIC with inputs DT and DR. The
ringing source can be balanced or unbal-
anced superimposed on V
or GND. The
unbalanced ringing source may be applied
to either the ring lead or the tip lead with
return via the other wire. A ring relay driven
by the SLIC ring relay driver connects the
ringing source to tip and ring.
Figure 12. Battery feed characteristics (without the protection resistors on the line).
C
D
B
A
E
G
F
F
J
H
C
B
D
A
V
TR
[V]
I
DC characteristics
A:
60
·
10
3
I
(@ V
= 0V) = I
+
|
V
Bat
|
- V
OHVirt
- R
Feed
·
(I
LProg
+ 4
·
10
-3
)
B:
R
feedB
= 2
·
30 k
C:
R
LC
I
(typ)= I
= 10
3
- 4
·
10
-3
V
TR
=
|
V
Bat
|
- V
OHvirt
- R
Feed
·
(I
LProg
+ 4
·
10
-3
)
D:
R
= R
SG
+ 2
·
10
4
200
E:
IL
≈
6 mA
F:
Apparent battery V
Bat
(@ I
L
= 0) =
|
V
Bat
|
- V
OHvirt
- R
Feed
·
4
·
10
-3
)
G:
R
feedG
= 2
·
25
H:
V
TROpen
=
|
V
Bat
|
- V
OH
J:
Virtual battery V
BatVirt
(@ IL = 4 mA) =
|
V
Bat
|
- V
OHVirt
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PBL386302QNT | 制造商:ERICSSON 制造商全称:Ericsson 功能描述:Subscriber Line Interface Circuit |
| PBL386302QNTNT | 制造商:Infineon Technologies AG 功能描述:POTS |
| PBL386302SHT | 制造商:ERICSSON 制造商全称:Ericsson 功能描述:Subscriber Line Interface Circuit |
| PBL386302SOAXT | 制造商:Infineon Technologies AG 功能描述:SLIC 1-CH 66dB 45mA 5V 24-Pin DSO T/R |
| PBL386302SOS | 制造商:ERICSSON 制造商全称:Ericsson 功能描述:Subscriber Line Interface Circuit |
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