PBL386652QNT Datasheet PDF - Ericsson
| Part Number | PBL386652QNT | |
| Description | Subscriber Line Interface Circuit | |
| Manufacturers | Ericsson | |
| Logo |  |
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Preliminary
May 2000
PBL 386 65/2
Subscriber Line
Interface Circuit
Description
The PBL 386 65/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated
circuit for use in DLC, Central Office and other telecommunications equipment. The
PBL 386 65/2 has been optimized for low total line interface cost and a high degree
of flexibility in different applications.
The PBL 386 65/2 emulates a transformer equivalent dc-feed, programmable
between 2x25 Ω and 2x900 Ω, 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, ground key and ring trip detection functions. The
PBL 386 65/2 is compatible with loop start and ground 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 the DLC requirements.
The PBL 386 65/2 package is 28-pin PLCC and 28-pin SSOP.
DT
DR
TIPX
RINGX
HP
TS
AOV
VBAT2
VBAT
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
Ring Relay
Driver
Input
Decoder and
Control
RRLY
C1
C2
C3
VCC
DET
PSG
LP
REF
PLC
PLD
AGND
VTX
RSN
VEE
(Optional)
Key Features
• Selectable overhead voltage principle
– All adaptive: The overhead voltage
follows 0.6PeakV < signals < 6.2VPeak.
– Semi adaptive: The overhead voltage
follows 3.1VPeak < signals < 6.2VPeak.
• Metering 2.2 Vrms
• 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 VBat for
maximum line voltage
• 44V open loop voltage @ -48V
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
• Ground key detector
• Analog temperature guard
• Tip open state with ring ground detector
• Silent polarity reversal
• Line voltage measurement
• -40° C to +85° C ambient temperature
range
PBL 386 65/2
28-pin PLCC and 28-pin SSOP.
1
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Preliminary
PBL 386 65/2
Parameter
Four-wire to two-wire, g4-2
Four-wire to four-wire, g4-4
Insertion loss
Two-wire to four-wire, G2-4
Four-wire to two-wire, G4-2
Gain tracking
Two-wire to four-wire RLDC≤ 2kΩ
Four-wire to two-wire RLDC≤ 2kΩ
Noise
Idle channel noise at two-wire
(TIPX-RINGX)
Harmonic distortion
Two-wire to four-wire
Four-wire to two-wire
Battery feed characteristics
Constant loop current, ILconst
Tip open state TIPX current, ILeak
Tip open state RINGX current, ILRTO
Tip open state RINGX voltage, VRTO
Tip voltage (ground start)
Tip voltage (ground start)
Open circuit state loop current, ILOC
Figure 6.
Frequency response, insertion loss,
gain tracking.
1
ωC
<< RL, RL = 600 Ω
RT = 120 kΩ, RRX = 120 kΩ
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. EL = 0 V
0.3 kHz < f < 3.4 kHz
Min
-0.15
-1.0
-1.0
-0.15
Typ
-0.2
-0.3
Max
0.15
0
0
0.15
Unit
dB
dB
dB
dB
6 0 dBm, 1.0 kHz, Note 5
G2-4 = 20 • Log
VTX
VTR
,ERX = 0
6 0 dBm, 1.0 kHz, Notes 5, 6
G4-2 = 20 • Log
VTR
ERX
,EL = 0
6 Ref. -10 dBm, 1.0 kHz, Note 7
-40 dBm to +3 dBm
-55 dBm to -40 dBm
6 Ref. -10 dBm, 1.0 kHz, Note 7
-40 dBm to +3 dBm
-55 dBm to -40 dBm
-6.22 -6.02 -5.82 dB
-0.2 0.2 dB
-0.1 0.1 dB
-0.2 0.2 dB
-0.1 0.1 dB
-0.2 0.2 dB
C-message weighting
Psophometrical weighting
Note 8
7 12 dBrnC
-83 -78 dBmp
6 0 dBm, 1.0 kHz test signal
0.3 kHz < f < 3.4 kHz
-50 dB
-50 dB
15 ILProg = 500
RLC
18 < ILProg < 65 mA
7 S = closed; R = 7 kΩ
0.92 ILProg ILProg
1.08 ILProg mA
-100
µA
7 RLRTO = 0Ω, VBat = -48V
RLRTO = 2.5 kΩ, VBat = -48V
7 ILRTO < 23 mA
7 Active state, Tip lead open (S open), -4
IL
17
VBat+ 5.8
-2.5 -
mA
mA
V
V
Ring lead to ground through 150 Ω
7 Active state, tip lead to -48 V
-6 -3.1 -
V
through 7 kΩ (S closed), Ring
lead to ground through 150 Ω
RL = 0Ω
-100
0
100 µA
C
TIPX
VTX
RL
VTR ILDC PBL 386 65/2
RT
EL
RINGX
RSN
RRX
E RX
VTX
5
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| Information | Total 18 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ PBL386652QNT.PDF Datasheet ] | |
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