Ericsson PBL38650-2QNS, PBL38650-2QNT, PBL38650-2SHT, PBL38650-2SOS, PBL38650-2SOT Datasheet

Description
The PBL 386 50/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated circuit for use in Central Office Metering applications and other telecommunications equipment. The PBL 386 50/2 has been optimized for low total line interface cost and a high degree of flexibility in different applications.
The PBL 386 50/2 emulates resistive loop feed, programmable between 2x50 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 2x30kΩ.
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 50/2 is compatible with both loop and ground 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 50/2 package options are 24-pin SSOP, 24-pin SOIC or 28-pin PLCC.
Figure 1. Block diagram.
June 1999
PBL 386 50/2
Subscriber Line
Interface Circuit
Key Features
• 24-pin SSOP package
• Programmable two-wire signal headroom for 2.2 V
rms
metering
• High and low battery with automatic switching
• Only +5 V feed in addition to battery
• Selectable transmit gain (0.5x or 0.25x)
• 70 mW on-hook power dissipation in active state
• On-hook transmission
• Long loop battery feed tracks Vbat for maximum line voltage
• No power-up sequence
• 43V open loop voltage @
-48V battery feed
• Constant loop voltage for line leakage <5 mA (RLeak ~ >10 k @ -48V)
• Full longitudinal current capability during on-hook state
• Analog over temperature protection permits transmission while the protection circuit is active
• Line voltage measurement
• Polarity reversal
• Ground key detector
• Tip open state with ring ground detector
24-pin SOIC, 24-pin SSOP, 28-pin PLCC
1
RRLY
C1
C2
C3 DET
PSG
REF
LP
PLD
PLC
VTX
RSN
PTG
BGND
AGND
VBAT
VBAT2
VCC
HP
RINGX
TIPX
DR
DT
Ring Relay
Driver
Input
Decoder
and
Control
Ring Trip
Comparator
Ground Key
Detector
Line Feed Controller
and
Longitudinal
Signal
Suppression
Off-hook Detector
VF Signal
Transmission
Two-wire Interface
POV
PBL
386 50/2
PBL 386 50/2
PBL 386 50/2
PBL 386 50/2
2
Maximum Ratings
Parameter Symbol Min Max Unit
Temperature, Humidity
Storage temperature range T
Stg
-55 +150 °C
Operating temperature range T
Amb
-40 +110 °C
Operating junction temperature range, Note 1 T
J
-40 +140 °C
Power supply, 0°C T
Amb
-70°C
V
CC
with respect to A/BGND V
CC
-0.4 6.5 V
V
Bat2
with respect to A/BGND V
Bat2
V
Bat
0.4 V
V
Bat
with respect to A/BGND, continuous V
Bat
-75 0.4 V
V
Bat
with respect to A/BGND, 10 ms V
Bat
-80 0.4 V
Power dissipation
Continuous power dissipation at T
Amb
+70 °CP
D
1.5 W
Ground
Voltage between AGND and BGND V
G
-0,3 0,3 V
Relay Driver
Ring relay supply voltage BGND+14 V
Ring trip comparator
Input voltage V
DT
, V
DR
V
Bat
AGND V
Input current I
DT
, I
DR
-5 5 mA
Digital inputs, outputs (C1, C2, C3, DET) Input voltage V
ID
-0.4 V
CC
V
Output voltage V
OD
-0.4 V
CC
V
TIPX and RINGX terminals, 0°C < T
Amb
< +70°C, V
Bat
= -50V
Maximum supplied TIPX or RINGX current I
TIPX
, I
RINGX
-100 +100 mA
TIPX or RINGX voltage, continuous (referenced to AGND), Note 2 VTA, V
RA
-80 2 V
TIPX or RINGX, pulse < 10 ms, t
Rep
> 10 s, Note 2 VTA, V
RA
V
Bat
-10 5 V
TIPX or RINGX, pulse < 1 µs, t
Rep
> 10 s, Note 2 VTA, V
RA
V
Bat
-25 10 V
TIPX or RINGX, pulse < 250 ns, t
Rep
> 10 s, Notes 2 & 3 VTA, V
RA
V
Bat
-35 15 V
Recommended Operating Condition
Parameter Symbol Min Max Unit
Ambient temperature T
Amb
0 +70 °C
V
CC
with respect to AGND V
CC
4.75 5.25 V
V
Bat
with respect to AGND V
Bat
-65 -8 V
AGND with respect to BGND V
G
-100 100 mV
Notes
1. The circuit includes thermal protection. Operation at or above 140°C junction temperature may degrade device reliability.
2. With the diodes D
VB
and D
VB2
included, see figure 12.
3. R
F1
and RF2 20 is also required. Pulse is applied to TIP and RING outside RF1 and RF2.
PBL 386 50/2
3
Figure 2. Overhead voltage, V
TRO
, two-
wire port
1 << R
L
, RL= 600
ωC R
T
= 60 kΩ, RRX = 60 k
Electrical Characteristics
0 °C T
Amb
+70 °C, PTG = Open (see pin description), ROV = , VCC= +5V ±5 %, V
Bat
= -58V to -40V, V
Bat2
= -32V, RLC=32.4 k, I
L
= 27 mA. RL = 600 , RF1= RF2= RP1= RP2=0, R
Ref
= 49.9 k, CHP = 47 nF, CLP=0.15 µF, RT = 60 kΩ, RSG = 0 kΩ, RRX = 60 kΩ, RR =
11 k unless otherwise specified. Current definition: current is positive if flowing into a pin.
Ref
Parameter fig Conditions Min Typ Max Unit
Two-wire port
Overhead voltage, V
TRO ,ILdc
> 18mA 2 Active state, ROV = 2.7 V
Peak
0.2 kHz < f < 3.4 kHz
On-Hook, I
Ldc
< 5mA 1% THD, Note 1 1.1 V
Peak
Over load level, metering f16kHz, Z
LAC
=200Ω, Adj. by R
OV
5.0 V
Peak
Input impedance, Z
TR
Note 2 ZT/200
Longitudinal impedance, Z
LOT
, Z
LOR
0 < f < 100 Hz 20 35 /wire
Longitudinal current limit, I
LOT
, I
LOR
active state 18 mA
rms
/wire
Longitudinal to metallic balance, B
LM
Normal polarity:
(IEEE standard 455-1985, Z
TRX
=736) 0.2 kHz < f < 1.0 kHz 55 dB
Longitudinal to metallic balance, B
LME
3 1.0 kHz < f < 3.4 kHz 55 dB
Reverse polarity:
0.2 kHz < f < 3.4 kHz 55 dB
Longitudinal to four-wire balance, B
LFE
3 Normal polarity:
0.2 kHz < f < 1.0 kHz 61 75 dB
1.0 kHz < f < 3.4 kHz 61 70 dB Reverse polarity:
0.2 kHz < f < 3.4 kHz 61 68 dB
Metallic to longitudinal balance, B
MLE
4 0.2 kHz < f < 3.4 kHz 40 50 dB
VTR
B
MLE
= 20 · Log ; ERX = 0
V
Lo
Figure 3. Longitudinal to metallic (B
LME
)
and Longitudinal to four-wire (B
LFE
)
balance
1 << 150 , R
LR =RLT
=RL /2=300
ωC RT = 60 kΩ, RRX = 60 k
B
LFE
= 20 · Log
E
Lo
V
TR
B
LME
= 20 · Log
E
Lo
V
TX
PBL 386 50/2
TIPX
RINGX
RSN
VTX
R
T
R
RX
E
RX
R
L
V
TRO
I
LDC
C
PBL 386 50/2
TIPX
RINGX RSN
VTX
R
T
R
RX
V
TX
R
LT
C
V
TR
R
LR
E
Lo
PBL 386 50/2
4
Parameter fig Conditions Min Typ Max Unit
Four-wire to longitudinal balance, B
FLE
4 0.2 kHz < f < 3.4 kHz 40 50 dB
E
RX
B
FLE
= 20 · Log
V
Lo
Two-wire return loss, r |ZTR + ZL|
r = 20 · Log
|Z
TR
- ZL|
0.2 kHz < f < 1.0 kHz 27 35 dB
1.0 kHz < f < 3.4 kHz, Note 3 20 22 dB
TIPX idle voltage, V
Ti
active, IL <5 mA - 1.3 V
RINGX idle voltage, V
Ri
active, IL <5 mA V
Bat
+3.0 V
tip open, I
L
<5 mA V
Bat
+3.0 V
V
TR
active, IL<5 mA V
Bat
+4.3 V
Four-wire transmit port (VTX) Overhead voltage, V
TXO
, IL > 18mA 5 Load impedance > 20 kΩ, 1.35 V
Peak
1% THD, Note 4
On-hook, I
L
< 5mA 0.55 V
Peak
Output offset voltage, ∆V
TX
-100 0 100 mV
Output impedance, z
TX
0.2 kHz < f < 3.4 kHz 15 50
Four-wire receive port (RSN) Receive summing node (RSN) DC voltage I
RSN
= -155 µA 1.15 1.25 1.35 V Receive summing node (RSN) impedance 0.2 kHz < f < 3.4 kHz 8 20 Receive summing node (RSN) 0.3 kHz < f < 3.4 kHz current (I
RSN
) to metallic loop current (IL) 200 ratio
gain,α
RSN
Frequency response
Two-wire to four-wire, g
2-4
6 relative to 0 dBm, 1.0 kHz. ERX = 0 V
0.3 kHz < f < 3.4 kHz -0.20 0.10 dB f = 8.0 kHz, 12 kHz, 16 kHz -1.0 0.1 dB
Figure 4. Metallic to longitudinal and four­wire to longitudinal balance
1 << 150 , R
LT
=RLR =RL /2 =300
ωC R
T
= 60 kΩ, RRX = 60 k
Figure 5. Overhead voltage, V
TXO
, four-
wire transmit port
1 << R
L
, RL = 600
ωC R
T
= 60 kΩ, RRX = 60 k
Ref
PBL 386 50/2
TIPX
RINGX RSN
VTX
R
T
R
RX
E
RX
R
LT
C
V
TR
R
LR
V
Lo
PBL 386 50/2
TIPX
RINGX RSN
VTX
R
T
R
RX
R
L
I
LDC
C
E
L
V
TXO
PBL 386 50/2
5
Four-wire to two-wire, g
4-2
6 relative to 0 dBm, 1.0 kHz. EL=0 V
0.3 kHz < f < 3.4 kHz -0.2 0.1 dB f = 8 kHz, 12 kHz, -1.0 0 dB 16 kHz -2.0 0 dB
Four-wire to four-wire, g
4-4
6 relative to 0 dBm, 1.0 kHz, EL=0 V
0.3 kHz < f < 3.4 kHz -0.2 0.1 dB
Insertion loss
Two-wire to four-wire, G
2-4
6 0 dBm, 1.0 kHz, Note 5
V
TX
G
2-4
= 20 · Log ; ERX = 0 -6.22 -6.02 -5.82 dB
V
TR
PTG = AGND -12.24 -12.04 -11.84 dB
Four-wire to two-wire, G
4-2
6 0 dBm, 1.0 kHz, Note 6
V
TR
G
4-2
= 20 · Log ; EL = 0 -0.2 0.2 dB
E
RX
Gain tracking
Two-wire to four-wire 6 Ref. -10 dBm, 1.0 kHz, Note 7
-40 dBm to +3 dBm -0.1 0.1 dB
-55 dBm to -40 dBm -0.2 0.2 dB
Four-wire to two-wire 6 Ref. -10 dBm, 1.0 kHz,
-40 dBm to +3 dBm -0.1 0.1 dB
-55 dBm to -40 dBm -0.2 0.2 dB
Noise
Idle channel noise at two-wire C-message weighting, 2 wire 12 dBrnC (TIPX-RINGX) or four-wire (VTX) output Psophometrical weighting, 2 wire -78 dBmp
C-message weighting, 4 wire 6 dBrnC Psophometrical weighting, 4 wire -84 dBmp Note 8
Harmonic distortion
Two-wire to four-wire 6 0 dBm -67 -50 dB Four-wire to two-wire 0.3 kHz < f < 3.4 kHz -67 -50 dB
Battery feed characteristics
Loop current, I
L
, in the current 13 18mA ≤ IL 45 mA 0.92 ILI
L
1.08 ILmA
limited region, reference A, B & C Tip open state TIPX current, I
Leak
7 S = closed; R = 7 k, Note 10 -150 µA
Tip open state RINGX current, I
LRTo
R
LRTo
= 0Ω, V
Bat
= -48V I
L
mA
R
LRTo
= 2.5 kΩ, V
Bat
= -48V 17 mA
Tip open state RINGX voltage, V
RTo
I
LRTo
< 23 mA V
Bat
+6 V
Ref
Parameter fig Conditions Min Typ Max Unit
Figure 6. Frequency response, insertion loss, gain tracking.
1 << R
L
, RL = 600
ωC
R
T
= 60 kΩ, RRX = 60 k
PBL 386 50/2
TIPX
RINGX RSN
VTX
R
T
R
RX
E
RX
R
L
V
TR
I
LDC
C
E
L
V
TX
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