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参数资料
型号： PBL386402SOT
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： 138K
代理商： PBL386402SOT
PBL 386 40/2
14
Figure 13. Battery Feed characteristics (without the protection resistors on the line).
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:
I
L
≈
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
(@ I
L
= 4 mA) =
|
V
Bat
|
- V
OHVirt
Loop Monitoring Functions
The loop current, ground key and ring trip
detectors report their status through a
common output, DET. The detector to be
connected to DET is selected via the
three bit wide control interface C1, C2
and C3. Please refer to section 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 selecting the value of resistor R
. R
LD
connects between pin PLD and ground
and is calculated according to
LD
= 500
R
LTh
the current detector is internally filtered
and is not influenced by the ac signal at
the two wire side.
Ground Key Detector
The ground key detector is indicating
when the ground key is pressed (active)
by putting the output pin DET to a logical
high level when selected. The ground
key detector circuit senses the difference
in TIPX and RINGX currents. When the
current at the RINGX side exceeds the
current at the TIPX side with the thres-
hold value the detector is triggered. For
threshold current values, please refer to
the datasheet.
Ring Trip Detector
Ring trip detection is accomplished by
connecting an external network to a
comparator in the SLIC with inputs DT
and DR. The ringing source can be
balanced or unbalanced 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.
The ring trip function is based on a
polarity change at the comparator input
when the line goes off-hook. In the on-
hook state no dc current flows through
the loop and the voltage at comparator
input DT is more positive than the
voltage at input DR. When the line goes
off-hook, while the ring relay is ener-
gized, dc current flows and the compara-
tor input voltage reverses polarity.
Figure 12 gives an example of a ring
C
D
B
A
E
G
F
F
J
H
C
B
D
A
V
TR
[V]
I
[
DC characteristics
相关PDF资料
PDF描述
PBL386402SHT Subscriber Line Interface Circuit
PBL386402QNS Subscriber Line Interface Circuit
PBL386502 Subscriber Line Interface Circuit
PBL386502QNS Subscriber Line Interface Circuit
PBL386502QNT Subscriber Line Interface Circuit
相关代理商/技术参数
参数描述
PBL386402SOTNT 制造商:Infineon Technologies AG 功能描述:SLIC 1-CH 66dB 45mA 5V/-9V/-12V/-15V/-18V/-24V/-28V 24-Pin DSO T/R
PBL38650/2QNA 功能描述:IC LINE INTERFACE SLIC PLCC-28 RoHS:否 类别:集成电路 (IC) >> 接口 - 电信 系列:FlexiSLIC™ 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:*
PBL38650/2QNS 功能描述:IC LINE INTERFACE SLIC PLCC-28 RoHS:否 类别:集成电路 (IC) >> 接口 - 电信 系列:FlexiSLIC™ 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:*
PBL38650/2QNT 功能描述:IC LINE INTERFACE SLIC PLCC-28 RoHS:否 类别:集成电路 (IC) >> 接口 - 电信 系列:FlexiSLIC™ 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:*
PBL38650/2SOA 制造商:Rochester Electronics LLC 功能描述:- Bulk
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