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What is PBL386202QNS?

This electronic component, produced by the manufacturer "Ericsson", performs the same function as "Subscriber Line Interface Circuit".


PBL386202QNS Datasheet PDF - Ericsson

Part Number PBL386202QNS
Description Subscriber Line Interface Circuit
Manufacturers Ericsson　
Logo Ericsson Logo　


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June 1999
PBL 386 20/2
Subscriber Line
Interface Circuit
Description
The PBL 386 20/2 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 20/2 has been optimized for low total line interface cost and a high
degree of flexibility in different applications.
The PBL 386 20/2 has constant current feed, programmable to max. 30 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, ground key and ring trip detection functions.
The PBL 386 20/2 is compatible with loop start signaling.
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
two-wire impedance, complex or real, is set by a simple external network.
Longitudinal voltages are suppressed by a feedback loop in the SLIC and the
longitudinal balance specifications meet Bellcore TR909 requirements.
The PBL 386 20/2 package options are 24-pin SSOP, 24-pin SOIC and 28 pin PLCC.
Key Features
• 24-pin SSOP package
• High and low battery with automatic
switching
• 60 mW on-hook power dissipation in
active state
• On-hook transmission
• Long loop battery feed tracks Vbat for
maximum line voltage
• Only +5 V feed in addition to battery
• Selectable transmit gain (1x or 0.5x)
• No power-up sequence
• 44V open loop voltage @ -48V battery
feed
• Full longitudinal current capability
during on-hook state
• Analog over temperature protection
permits transmission while the
protection circuit is active
• Integrated Ring Relay driver
• Ground key detector
• Programmable signal headroom
DT
DR
TIPX
RINGX
HP
VCC
VBAT2
VBAT
AGND
BGND
Two-wire
Interface
Figure 1. Block diagram.
Ring Trip
Comparator
Ground Key
Detector
Line Feed
Controller
and
Longitudinal
Signal
Suppression
Off-hook
Detector
VF Signal
Transmission
PTG
Ring Relay
Driver
Input
Decoder
and
Control
RRLY
C1
C2
C3
DET
POV
PSG
PLC
LP
PLD
REF
VTX
RSN
PBL 386 20/2
24-pinSOIC, 24-pin SSOP, 28-pin PLCC
1

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PBL386202QNS equivalent
PBL 386 20/2
Parameter
Four-wire to two-wire, g4-2
Four-wire to four-wire, g
4-4
Insertion loss
Two-wire to four-wire, G2-4
Four-wire to two-wire, G4-2
Gain tracking
Two-wire to four-wire
Four-wire to two-wire
Noise
Idle channel noise at two-wire
(TIPX-RINGX) or four-wire (VTX) output
Harmonic distortion
Two-wire to four-wire
Four-wire to two-wire
Battery feed characteristics
Constant loop current, I
LProg
ILProg @ 30 mA
ILProg @ 18 mA
Open circuit state loop current, I LOC
Ref
fig Conditions
6 relative to 0 dBm, 1.0 kHz. EL=0 V
0.3 kHz < f < 3.4 kHz
f = 8 kHz, 12 kHz,
16 kHz
6 relative to 0 dBm.1.0 kHz, E =0 V
L
0.3 kHz < f < 3.4 kHz
6 0 dBm, 1.0 kHz, Note 5
G2-4 = 20 · Log
VTX
VTR
; ERX = 0
PTG = AGND
6 0 dBm, 1.0 kHz, Note 6
G4-2 = 20 · Log
VTR
ERX
; EL = 0
6 Ref. -10 dBm, 1.0 kHz, Note 7
-40 dBm to + 0 dBm
-55 dBm to -40 dBm
6 Ref. -10 dBm
-40 dBm to + 0 dBm
-55 dBm to -40 dBm
C-message weighting
Psophometrical weighting
Note 8
6 0 dBm
0.3 kHz < f < 3.4 kHz
12 I = 1 000 - 4.0 (mA)
LProg
RLC
12
ILProg
=
1 000
RLC
- 4.2 (mA)
12
ILProg
=
1 000
RLC
- 3.9 (mA)
RLC in kΩ
RL = 0Ω
Min Typ
-0.2
-1.0
-2.0
-0.2
-0.2
-6.22
-6.02
-0.2
-0.1
-0.2
-0.1
-0.2
-67
-67
0.92 I I
LProg LProg
0.95 ILProg ILProg
0.94 ILProg ILProg
-100
0
Max
Unit
0.1 dB
0 dB
0 dB
0.1 dB
0.2
-5.82
dB
dB
0.2 dB
0.1 dB
0.2 dB
0.1 dB
0.2 dB
12 dBrnC
-78 dBmp
-50 dB
-50 dB
1.08 I mA
LProg
1.05 ILProg mA
1.06 ILProg mA
100 µA
Figure 6.
Frequency response, insertion loss,
gain tracking.
1 << RL, RL = 600 Ω
ωC
RT = 120 kΩ, RRX = 60 kΩ
C
TIPX
VTX
RL
VTR ILDC PBL 386 20/2
RT
EL RINGX RSN
RRX
E RX
VTX
5


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