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参数资料
| 型号： | PBL386612QNT |
| 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： | 1/18页 |
| 文件大小： | 115K |
| 代理商： | PBL386612QNT |
Description
The PBL 386 61/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated
circuit for use in Central Office, MUX and other telecommunications equipment. The
PBL 386 61/2 has been optimized for low total line interface cost and a high degree of
flexibility in different applications.
The PBL 386 61/2 emulates a transformer equivalent dc-feed, programmable
between 2x25
and 2x900
, with short loop current limiting adjustable to max
65 mA.
A second lower battery voltage may be connected to the device to reduce short
loop power dissipation. The SLIC automatically switches between the two battery
supply voltages without need for external components or external control.
The SLIC incorporates loop current and ring trip detection functions. The
PBL 386 61/2 is compatible with loop start signalling.
Two- to four-wire and four- to two-wire voice frequency (vf) signal conversion is
accomplished by the SLIC in conjunction with either a conventional CODEC/filter or
with a programmable CODEC/filter, e.g. SLAC, SiCoFi, Combo II. The programmable
line terminating impedance could be complex or real to fit every market.
Longitudinal line voltages are suppressed by a feedback loop in the SLIC and the
longitudinal balance specifications meet Bellcore TR909 requirements.
The PBL 386 61/2 package is 28-pin PLCC.
Figure 1. Block diagram.
February 2000
PBL 386 61/2
Subscriber Line
Interface Circuit
28-pin plastic PLCC
VF Signal
Transmission
Off-hook
Detector
Line Feed
Controller
and
Longitudinal
Signal
Suppression
Ring Trip
Comparator
Two-wire
Interface
Input
Decoder and
Control
C1
C2
DET
REF
LP
VTX
RSN
DT
DR
TIPX
HP
RINGX
VCC
VEE
VBAT2
VBAT
AGND
C3
BGND
Ground Key
Detector
Ring Relay
Driver
RRLY
PLD
PLC
PSG
TS
AOV
VEE
386612
Preliminary
Key Features
Selectable overhead voltage principle
– All adaptive: The overhead voltage
follows 0.6 V
< signals < 6.2 V
.
– Semi adaptive: The overhead voltage
follows 3.1 V
Peak
< signals < 6.2 V
Peak
.
Metering 2.2 V
rms
.
High and low battery with automatic
switching
Battery supply as low as -10 V
Only +5 V in addition to GND
and battery (VEE optional)
39 mW on-hook power dissipation in
active state
Long loop battery feed tracks V
Bat
for
maximum line voltage
44 V open loop voltage @ -48 V battery
feed
Constant loop voltage for line
leakage <5 mA
On-hook transmission
Full longitudinal current capability
during on-hook
Programmable loop & ring-trip detector
threshold
Analog temperature guard
1
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相关代理商/技术参数 |
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|---|---|
| PBL386652 | 制造商:ERICSSON 制造商全称:Ericsson 功能描述:Subscriber Line Interface Circuit |
| PBL38665-2 | 制造商:ERICSSON 制造商全称:Ericsson 功能描述:Subscriber Line Interface Circuit |
| PBL386652QNS | 制造商:ERICSSON 制造商全称:Ericsson 功能描述:Subscriber Line Interface Circuit |
| PBL386652QNT | 制造商:ERICSSON 制造商全称:Ericsson 功能描述:Subscriber Line Interface Circuit |
| PBL386652SHT | 制造商:ERICSSON 制造商全称:Ericsson 功能描述:Subscriber Line Interface Circuit |
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