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Ericsson

PBL38710-1 Datasheet Preview

PBL38710-1 Datasheet

Subscriber Line Interface Circuit

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February 1999
PBL 387 10/1
Subscriber Line
Interface Circuit
Description
The PBL 387 10/1 ring SLIC (Subscriber Line Interface Circuit) is a bipolar integrated
circuit in 90 V technology which replaces the conventional transformer based analog
line interface and ringrelay in FITL, WLL, ISDN-TA and other telecommunications
equipment with a modern, compact solid state design. Not only is required PCB area
reduced, but less component weight and height result as well. The PBL 387 10/1 has
been optimized for low cost and to require only a minimum of external components.
The PBL 387 10/1 constant-current feed system, programmable to max 40 mA of
line current, can operate with battery supply voltages down to -21 V to reduce line
card power dissipation.
The SLIC incorporates loop current, ground key and ring trip detection functions.
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.
The PBL 387 10/1 package is 28-pin PLCC.
RDR
TIPX
HPR
HPT
RINGX
VCC
VEE
Two-wire
Interface
Ring Trip
Detector
Ground Key
Detector
Line Feed
Controller
and
Longitudinal
Signal
Suppression
Battery
switch
Input
Decoder and
Control
VBAT2
VBAT
C1
C2
HB
E1
DET
RDC
RSG
Key Features
· Ring SLIC eliminates ring relay and
conventional ring-generator
· Supports sine wave and trapezoidal
ringing
· -85 V battery feed for high voltage ring
signal
· On chip automatic battery switch
· Programmable battery feed
characteristics
· Battery supply voltage as low as -21 V
for power efficient line card designs
· Low on-hook power dissipation,
50 mW @-24 V battery
· Loop current, ring trip and ground key
detection functions
· Programmable loop current detector
threshold
· Programmable ring trip detector
threshold
· Hybrid function with all types of
CODEC/filter devices
· Programmable line terminating
impedance, complex or real
· On-hook transmission
· Tip-ring open circuit state for
subscriber loop power denial
AGND
BGND
Off-hook
Detector
VF Signal
Transmission
RD
VTX
3871P0B/1L
RSN
Ringing
Control
VR
28-pin PLCC
Figure 1. Block diagram.
1
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Ericsson

PBL38710-1 Datasheet Preview

PBL38710-1 Datasheet

Subscriber Line Interface Circuit

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PBL 387 10/1
Maximum Ratings
Parameter
Symbol
Min
Temperature, Humidity
Storage temperature range
Operating junction temperature range
Power supply, -40°C TAmb 85°C
VCC with respect to AGND
VEE with respect to AGND
VBat with respect to BGND
VBat2 with respect to BGND
TStg
TJ
VCC
VEE
VBat
VBat2
-55
-40
-0.5
-6.5
-85
VBat
Power dissipation
Continuous power dissipation at TAmb 85 °CP
Peak power dissipation at TAmb = 85 °C, t < 100 ms, tRep > 1 sec.
D
PDP
Ground
Voltage between AGND and BGND
VG -0.3
Digital inputs, outputs (C1, C2, E1, HB, DET)
Input voltage
Output voltage (DET disabled)
Output current (DET enabled)
Ring voltage, input (VR)
VID 0V
VOD 0V
IOD
Input voltage
V
VR
V
EE
TIPX and RINGX terminals, -40°C TAmb 85°C, VBat = -80V, Active, Disconnect and Stand by states
TIPX or RINGX voltage, continuous (referenced to AGND), Note 1
VTA, VRA
VBat
TIPX or RINGX, pulse < 10 ms, tRep > 10 s, Note 1
VTA, VRA
VBat - 5
TIPX or RINGX, pulse < 1 µs, tRep > 10 s, Note 1
VTA, VRA
VBat - 25
TIP or RING, pulse < 250 ns, tRep > 10 s, Note 1
VTA, VRA
V - 35
Bat
TIPX or RINGX maximum current supplied
Max
+150
+140
6.5
0.5
VEE + 0.5
VEE + 0.5
1.5
4W
0.3
CC
CC
5m
V
CC
2V
5
10
15
110
Unit
°C
°C
V
V
V
V
W
V
V
V
A
V
V
V
V
mA
Recommended Operating Conditions
Parameter
Ambient temperature
VCC with respect to AGND
VEE with respect to AGND
VBat2 with respect to BGND, Note 2
VBat with respect to BGND
Symbol
T
amb
VCC
VEE
VBat2
VBat
Min
-40
4.75
-5.25
-58
-80
Max
+85
5.25
-4.75
-24
VBat2
Unit
°C
V
V
V
V
Notes
1. Whith diodes in series with the VBat and VBat2 , see figure 12.
2. -24V <VBat2 < -21V may be used in applications requiring maximum vf signal amplitudes less than 3Vpk (8.75 dBm, 600 ).
2
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Part Number PBL38710-1
Description Subscriber Line Interface Circuit
Maker Ericsson
Total Page 20 Pages
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