pbl386112sht ETC-unknow, pbl386112sht Datasheet
pbl386112sht
Manufacturer Part Number
pbl386112sht
Description
Subscriber Line Interface Circuit
Manufacturer
ETC-unknow
Datasheet
1.PBL386112SHT.pdf
(18 pages)
Description
The PBL 386 11/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar inte-
grated circuit for use in DAML, FITL and other telecommunications equipment. The
PBL 386 11/2 has been optimized for low total line interface cost and a high degree
of flexibility in different applications.
between 2x25
65 mA.
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, ground key and ring trip detection functions. The
PBL 386 11/2 is compatible with loop start signalling.
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 balance specifications meet Bellcore TR909 requirements.
Figure 1. Block diagram.
The PBL 386 11/2 emulates a transformer equivalent dc-feed, programmable
A second lower battery voltage may be connected to the device to reduce short
Two- to four-wire and four- to two-wire voice frequency (vf) signal conversion is
Longitudinal line voltages are suppressed by a feedback loop in the SLIC and the
The PBL 386 11/2 package are 28-pin PLCC and 28 pin SSOP.
VBAT2
BGND
RINGX
VBAT
TIPX
AOV
VEE
DR
TS
DT
HP
and 2x900 , with short loop current limiting adjustable to max
Two-wire
Interface
Ground Key
Transmission
Comparator
Longitudinal
Suppression
Detector
Line Feed
Controller
VF Signal
Ring Trip
Off-hook
Detector
Signal
and
Decoder and
Ring Relay
Driver
Control
Input
C1
C2
C3
VCC
DET
REF
PLD
AGND
RRLY
PSG
LP
PLC
VTX
VEE
RSN
Interface Circuit
Subscriber Line
Key Features
• Selectable overhead voltage principle
• Metering 1.6 V
• High and low battery with automatic
• Battery supply as low as -10V
• Only +5V in addition to GND
• 35 mW on-hook power dissipation in
• Long loop battery feed tracks V
• 44V open loop voltage @ -48V battery
• Constant loop voltage for line
• On-hook transmission
• Full longitudinal current capability
• Programmable loop & ring-trip detector
• Ground key detector
• Analog temperature guard
• Silent polarity reversal
• Integrated Ring Relay Driver
28-pin plastic PLCC and 28-pin SSOP
– All adaptive: The overhead voltage
follows 0.6 V
– Semi adaptive: The overhead
voltage follows 2.5 V
5 V
switching
and battery (VEE optional)
active state
maximum line voltage
feed
leakage <5 mA
during on-hook
threshold
PBL 386 11/2
Peak
.
Peak
rms
< signals < 5 V
Peak
February 2000
< signals <
Bat
Peak
for
.
1
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