Interface Circuit. PBL38615-1 Datasheet

PBL38615-1 Circuit. Datasheet pdf. Equivalent


Ericsson PBL38615-1
Preliminary Information
February 2000
PBL 386 15/1
Subscriber Line
Interface Circuit
Description
The PBL 386 15/1 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated
circuit for use in ISDN Network Terminal Adapters, DAML, FITL and other short loop
telecommunication equipment which often are remote powered, and by that, the
available power is limited. The PBL 386 15/1 has been optimized for low total line
interface cost, low power and requires a minimum of external components.
The PBL 386 15/1 has constant current feed, programmable to max 30mA. The SLIC
uses a first battery voltage for On-hook . A second battery voltage is used for
Off-hook and must be connected, 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 loop current controls the switching
between On-hook and Off-hook battery.
The SLIC incorporates loop current, ground key and ring trip detection functions.
The PBL 386 15/1 is compatible with loop 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 voltages are
suppressed by a feedback loop in the SLIC and the longitudinal balance specifica-
tions meet Bellcore TR909 requirements.
The PBL 386 15/1 package is a very PCB space efficient 28-pin SSOP.
DT
DR
TIPX
RINGX
HP
TS
Two-wire
Interface
VBAT2
VBAT
BGND
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)
Applications
• ISDN Network terminals
• DAML
• FITL
• Shortloop applications
Key Features
• Small footprint with SSOP package
• On-hook and Off-hook battery with
automatic switching, controlled by
loop current
• On-hook battery current is limited
to 6 mA
• 37 mW on-hook power dissipation in
active state
• Metering 0.5 Vrms (0.7 Vpeak)
• Adaptive Overhead Voltage
The overhead voltage follows
1Vpeak<signals<2.5Vpeak
• Battery supply as low as -10V
• Only +5V in addition to GND
and battery (VEE optional)
• Open loop voltage tracks On-hook
battery
• Full longitudinal current capability
during On-hook
• 43.5V open loop voltage @ -48V
battery feed
• Automatic compensation for
line leakage up to 5 mA
• On-hook transmission
• Programmable loop & ring-trip
detector threshold
• Ground key detector
• Analog temperature guard with status
exclusively viewed at detector output
• Integrated Ring Relay Driver
• Silent polarity reversal
• Linevoltage measurement
PBL 386 15/1
Figure 1. Block diagram.
Package: 28-pin SSOP
1


PBL38615-1 Datasheet
Recommendation PBL38615-1 Datasheet
Part PBL38615-1
Description Subscriber Line Interface Circuit
Feature PBL38615-1; Preliminary Information February 2000 PBL 386 15/1 Subscriber Line Interface Circuit Description T.
Manufacture Ericsson
Datasheet
Download PBL38615-1 Datasheet




Ericsson PBL38615-1
PBL 386 15/1
Maximum Ratings
Parameter
Temperature, Humidity
Storage temperature range
Operating temperature range
Operating junction temperature range, Note 1
Power supply, -40°C TAmb +85°C
VCC with respect to AGND
VEE with respect to AGND
VBat2 with respect to A/BGND
VBat with respect to BGND, continuous
VBat2 with respect to BGND, 10 ms
Power dissipation
Continuous power dissipation at TAmb +85 °C
Ground
Voltage between AGND and BGND
Relay Driver
Ring relay supply voltage
Ring relay current
Ring trip comparator
Input voltage
Input current
Digital inputs, outputs (C1, C2, C3, DET)
Input voltage
Output voltage (DET not active)
Output current (DET)
TIPX and RINGX terminals, -40°C < TAmb < +85°C, VBat = -50 V
TIPX or RINGX current
TIPX or RINGX voltage, continuous (referenced to AGND), Note 2
TIPX or RINGX, pulse < 10 ms, tRep > 10 s, Note 2
TIPX or RINGX, pulse < 1 µs, tRep > 10 s, Note 2
TIP or RING, pulse < 250 ns, tRep > 10 s, Note 3
Symbol
TStg
TAmb
TJ
VCC
VEE
VBat2
VBat
VBat2
PD
VG
Min
Max
Unit
-55
+150
°C
-40
+110
°C
-40
+140
°C
-0.4 6.5
VBat 0.4
VBat 0.4
-75 0.4
-80 0.4
V
V
V
V
V
0.8 W
-5
VCC
V
BGND +13 V
75 mA
VDT, VDR
IDT, IDR
VBat
-5
VID -0.4
VOD -0.4
IOD
VCC
5
VCC
VCC
30
V
mA
V
V
mA
ITIPX, IRINGX
VTA, VRA
VTA, VRA
VTA, VRA
VTA, VRA
-110
VBat
VBat - 20
VBat - 40
VBat - 70
+110
2
5
10
15
mA
V
V
V
V
Recommended Operating Condition
Parameter
Ambient temperature
VCC with respect to AGND
VEE with respect to AGND
VBat with respect to BGND
VBat2 with respect to BGND
Symbol
TAmb
VCC
VEE
VBat
VBat2
Min
-40
4.75
VBat
-58
VBat
Max
+85
5.25
-4.75
-10
-10
Unit
°C
V
V
V
V
Notes
1. The circuit includes thermal protection. Operation above max. junction temperature may degrade device reliability.
2. A diode in series with the VBat input increases the permitted continuous voltage and pulse < 10 ms to -85 V.
A pulse 1µs is increased to the greater of |-70V| and |VBat -40V|.
3. RF1 and RF2 20 is also required. Pulse is supplied to TIP and RING outside RF1 and RF2.
2



Ericsson PBL38615-1
PBL 386 15/1
Electrical Characteristics
-40 °C TAmb +85 °C, VCC = +5V ±5 %, VEE = -5V ± 5%, VBat = -58V to -40V, VBat2 = -22V, RLC=18.7k(IL = 27 mA),
RL = 600 , RLD = 50 k, RF1, RF2 = 0 , RRef = 15k, CHP = 68nF, CLP=0.47 µF, RT = 120 k, RRX = 120 k, Current definition:
current is positive if flowing into a pin. Active state includes active normal and active reverse states unless otherwise specified.
Battery definition: VBat = On-hook battery, VBat2 = Off-hook battery.
Parameter
Two-wire port
Overload level, VTRO
Off-Hook, ILDC 10 mA
On-Hook, ILDC 5 mA
Metering ILDC 10 mA
Input impedance, ZTR
Longitudinal impedance, ZLoT, ZLoR
Longitudinal current limit, ILoT, ILoR
Longitudinal to metallic balance, BLM
Ref
fig Conditions
Min
2 Active state
1% THD, Note 1
1.0
1.0
ZLTTX = 200 , f = 16 kHz
Note 2
0 < f < 100 Hz
active state
12
IEEE standard 455-1985, ZTRX = 736
0.2 kHz < f < 1.0 kHz
53
1.0 kHz < f < 3.4 kHz
53
Typ Max
Unit
0.7
ZT/200
20
35
VPeak
VPeak
VPeak
/wire
mArms /wire
70 dB
70 dB
Longitudinal to metallic balance, BLME
BLME = 20 • Log ELo
VTR
Longitudinal to four-wire balance, BLFE
BLFE = 20 • Log ELo
VTX
Metallic to longitudinal balance, BMLE
BMLE = 20 • Log VTR
VLo
;ERX = 0
3
3
4
active state
0.2 kHz f 1.0 kHz
1.0 kHz < f < 3.4 kHz
active state
0.2 kHz f 1.0 kHz
1.0 kHz < f < 3.4 kHz
active state
0.2 kHz < f < 3.4 kHz
53 70
53 70
59 70
59 70
40 58
dB
dB
dB
dB
dB
Figure 2. Overload level, V , two-wire
TRO
port
1
wC
<<
R,
L
R=
L
600
RT = 120 k, RRX = 120 k
Figure 3. Longitudinal to metallic (BLME)
and Longitudinal to four-wire (BLFE)
balance
1
wC
<< 150 , RLR = RLT = RL /2= 300
RT = 120 k, RRX = 120 k
C
TIPX
VTX
RL VTRO
ILDC PBL 386 15/1
RINGX RSN
RT
RRX
E RX
ELo C
TIPX
VTX
RLT
VTR PBL 386 15/1
RLR
RINGX
RSN
RT VTX
RRX
3





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