pbl386102qnt ETC-unknow, pbl386102qnt Datasheet

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pbl386102qnt

Manufacturer Part Number
pbl386102qnt
Description
Subscriber Line Interface Circuit
Manufacturer
ETC-unknow
Datasheet
Description
The PBL 386 10/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated
circuit for use in PBX, Terminal adapters and other telecommunications equipment.
The PBL 386 10/2 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 10/2 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 10/2 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 10/2 package is 28-pin PLCC.
VBAT2
BGND
RINGX
VBAT
TIPX
VEE
AOV
DR
DT
TS
HP
and 2x900 , with short loop current limiting adjustable to max
Two-wire
Interface
Transmission
Ground Key
Comparator
Suppression
Longitudinal
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 1.6V
• 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 @ -48 V battery
• Constant loop voltage for line
• On-hook transmission
• Full longitudinal current capability
• Programmable loop & ring-trip detector
• Ground key detector
• Analog temperature guard
• Integrated Ring Relay Driver
28-pin plastic PLCC
– All adaptive: The overhead voltage
follows 0.6 V
– Semi adaptive: The overhead voltage
follows 2.5 V
switching
and battery (VEE optional)
active state
maximum line voltage
feed
leakage <5 mA
during on-hook
threshold
PBL 386 10/2
Peak
Peak
rms
< signals < 5 V
< signals < 5 V
February 1999
Peak
Bat
Peak
for
.
.
1

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pbl386102qnt Summary of contents

Page 1

Description The PBL 386 10/2 Subscriber Line Interface Circuit (SLIC bipolar integrated circuit for use in PBX, Terminal adapters and other telecommunications equipment. The PBL 386 10/2 has been optimized for low total line interface cost ...

Page 2

PBL 386 10/2 Maximum Ratings Parameter Temperature, Humidity Storage temperature range Operating temperature range Operating junction temperature range, Note 1 Power supply +70 C Amb V with respect to AGND CC V with respect to AGND EE ...

Page 3

Electrical Characteristics + + Amb 15k , C = 68nF Ref HP unless otherwise specified. Current definition: current is ...

Page 4

PBL 386 10/2 Parameter Four-wire to longitudinal balance, B FLE Two-wire return loss, r TIPX idle voltage RINGX idle voltage Four-wire transmit port (VTX) Overload level, V TXO Off-hook LDC ...

Page 5

Parameter Four-wire to two-wire, g 4-2 Four-wire to four-wire, g 4-4 Insertion loss Two-wire to four-wire, G 2-4 Four-wire to two-wire, G 4-2 Gain tracking Two-wire to four-wire LDC Four-wire to two-wire LDC Noise ...

Page 6

PBL 386 10/2 Parameter Loop current detector Programmable threshold, I DET I > LTh Ground key detector Ground key detector threshold I and I current difference to trigger ground key det. LTIPX LRINGX Ring trip comparator Offset voltage, ...

Page 7

Notes 1. The overload level is automatically expanded when the signal level > 2.5 V and is specified at the two-wire port Peak with the signal source at the four-wire receive port. 2. The two-wire impedance is programmable by selection ...

Page 8

PBL 386 10/2 Pin Description Refer to figure 7. PLCC Symbol Description 1 VBAT Battery supply voltage. Negative with respect to BGND. 2 VBAT2 An optional second battery voltage, connected in series with a diode external powerhandling resistor ...

Page 9

Figure 7. Pin configuration, 28 pin PLCC package, top view. SLIC Operating States State ...

Page 10

PBL 386 10/2 TIP + RING Figure 9. Simplified ac transmission circuit. Functional Description and Applications Information Transmission General A simplified ac model of the transmission circuits is shown ...

Page 11

Hybrid Function The hybrid function can easily be imple- mented utilizing the uncommitted amplifier in conventional CODEC/filter combinations. Please, refer to figure 10. Via impedance Z a current proportional injected B RX into the summing node of ...

Page 12

PBL 386 10/2 High-Pass Transmit Filter When CODEC/filter with a singel 5 V power supply is used necessary to separate the different signal reference voltages be- tween the SLIC and the CODEC/filter. In the transmit direction this can ...

Page 13

V is defined as the battery voltage on TRMax the VBat terminal minus the Battery Over Head voltage according to the equa- BOH tion TRMax L Bat ...

Page 14

PBL 386 10/2 KR + RING F1 OVP R TIP VB2 RESISTORS: (Values according to IEC-63 E96 ...

Page 15

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 ...

Page 16

PBL 386 10 LConst Feed 400 Apparent battery ...

Page 17

Printed Circuit Board Layout Care in Printed Circuit Board (PCB) layout is essential for proper function; The components connecting to the RSN input should be placed in close proximity to that pin, such that no interference is inject- ed into ...

Page 18

PBL 386 10/2 Ordering Information Package Temp. Range 28pin PLCC Tube PBL 386 10/2QNS 28pin PLCC Tape & Reel PBL 386 10/2QNT Information given in this data sheet is believed ...

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