pbl386302 ETC-unknow, pbl386302 Datasheet

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pbl386302

Manufacturer Part Number
pbl386302
Description
Subscriber Line Interface Circuit
Manufacturer
ETC-unknow
Datasheet
Description
The PBL 386 30/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated
circuit for use in Digital Loop Carrier, FITL and other telecommunications equipment.
The PBL 386 30/2 has been optimized for low total line interface cost and a high
degree of flexibility in different applications.
and 2x900 , with short loop current limiting adjustable to max 45 mA. In the current
limited region the loop feed is nearly constant current with a slight slope
corresponding to 2x30k .
loop power dissipation. The SLIC automatically switches between the two battery
supply voltages without need for external components or external control.
The PBL 386 30/2 is compatible with loop start signaling.
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
two-wire impendance, complex or real, is set by a simple external network.
longitudinal balance specifications meet the DLC requirements.
28-pin PLCC.
Figure 1. Block diagram.
The PBL 386 30/2 emulates resistive loop feed, programmable between 2x50
A second lower battery voltage may be connected to the device to reduce short
The SLIC incorporates loop current and ring trip detection functions.
Two- to four-wire and four- to two-wire voice frequency (VF) signal conversion is
Longitudinal voltages are suppressed by a feedback loop in the SLIC and the
The PBL 386 30/2 package options are 24-pin SSOP, 24-pin SOIC and
RINGX
VBAT2
AGND
BGND
VBAT
TIPX
VCC
DR
HP
DT
Two-wire
Interface
Transmission
Longitudinal
Suppression
Comparator
VF Signal
Line Feed
Controller
Ring Trip
Off-hook
Detector
Signal
and
PTG
Ring Relay
Decoder
Control
Driver
Input
and
PLC
PLD
REF
VTX
RSN
C1
DET
PSG
LP
C2
POV
RRLY
Interface Circuit
Subscriber Line
Key Features
• 24-pin SSOP package
• High and low battery supply with
• 65 mW on-hook power dissipation in
• On-hook transmission
• Long loop battery feed tracks Vbat for
• Only +5 V feed in addition to battery
• Selectable transmit gain (1x or 0.5x)
• No power-up sequence
• Programmable signal headroom
• 43V open loop voltage @ -48V battery
• Constant loop voltage for line leakage
• Full longitudinal current capability
• Analog over temperature protection
• Integrated Ring Relay Driver
• -40 C to +85 C ambient temperature
automatic switching
active state
maximum line voltage
feed
<5 mA (RLeak ~ >10 k @ -48V)
during on-hook state
permits transmission while the
protection circuit is active
range
PBL 386 30/2
24-pin SOIC, 24-pin SSOP, 28-pin PLCC
March 2000
1

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pbl386302 Summary of contents

Page 1

Description The PBL 386 30/2 Subscriber Line Interface Circuit (SLIC bipolar integrated circuit for use in Digital Loop Carrier, FITL and other telecommunications equipment. The PBL 386 30/2 has been optimized for low total line interface ...

Page 2

PBL 386 30/2 Maximum Ratings Parameter Temperature, Humidity Storage temperature range Operating temperature range Operating junction temperature range, Note 1 Power supply, - +85 C Amb V with respect to A/BGND CC V with respect to A/BGND Bat2 ...

Page 3

Electrical Characteristics - +85 C, PTG = open (see pin description), V Amb mA 600 , 52 ...

Page 4

PBL 386 30/2 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 > 18mA TXO L On-hook, ...

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 Four-wire to two-wire Noise Idle channel noise at two-wire (TIPX-RINGX) or four-wire ...

Page 6

PBL 386 30/2 Parameter Loop current detector Programmable threshold, I LTh Ring trip comparator Offset voltage, V DTDR Input bias current Input common mode range Ring relay driver Saturation voltage Off ...

Page 7

Notes 1. The overload level can be adjusted with the R for higher levels e.g. min 3.1 V Peak two-wire port with the signal source at the four-wire receive port. 2. The two-wire impedance is programmable by selection of external ...

Page 8

PBL 386 30/2 PTG 1 RRLY RINGX 4 BGND 5 24-pin SOIC and TIPX 6 24-pin SSOP VBAT 7 VBAT2 8 PSG Figure 7. Pin configuration, 24-pin SSOP, 24-pin SOIC ...

Page 9

NU Pin Not Used. Must be connected to AGND and C2 are digital inputs (internal pull-up) controlling the SLIC operating states Refer to section "Operating states" for details. 18 DET Detector output. Active low ...

Page 10

... RSN to metallic loop current gain = 200. Note that the SLICs two-wire to four-wire gain user programmable between 2-4S two fix values. Refer to the datasheets for values 2-4S Two-Wire Impedance To calculate Z , the impedance presented TR to the two-wire line by the SLIC including ...

Page 11

When choosing R , make sure the output TX load of the VTX terminal is > calculation of the Z formula above B yields a balance network containing an inductor, an alternate method is recom- mended. Contact ...

Page 12

PBL 386 30/2 Battery Feed The PBL 386 30/2 SLIC emulate resistive loop feed, programmable between 2·50 and 2·900 , with adjustable current limita- tion. In the current limited region the loop current has a slight slope corresponding to 2·30 ...

Page 13

K R +12 V /+5V R RING F2 TIP VB2 VB2 VB2 RESISTORS: (Values according to IEC E96 series 1/10 W ...

Page 14

PBL 386 30 Bat 0V LProg · feedB 10 3 · (typ ...

Page 15

PBL386 30/2 I +1.25 V Figure 13. CODEC receive interface. The ring trip function is based on a polar- ity change at the comparator input when the line goes off-hook. In the on-hook state no dc current flows through the ...

Page 16

PBL 386 30/2 may be applied to the SLIC. Secondary Protection The circuit shown in figure 11 utilizes series resistors together with a programmable overvoltage protector (e.g. Power Innovations TISPPBL2), serv- ing as a secondary protection. The TISPPBL2 is a ...

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