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參數(shù)資料
| 型號： | PBL38614-1 |
| 廠商： | ERICSSON |
| 英文描述： | Subscriber Line Interface Circuit |
| 中文描述： | 用戶線接口電路 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大?。?/td> | 219K |
| 代理商： | PBL38614-1 |
Description
The PBL 386 14/1 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated
circuit for use in ISDN Network Terminal Adapters and other short loop
telecommunication equipment which often are remote powered, and by that, the
available power is limited. The PBL 386 14/1 has been optimized for low total line
interface cost, low power and requires a minimum of external components.
The PBL 386 14/1 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 14/1 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 14/1 package is a very PCB space efficient 28-pin SSOP.
Figure 1. Block diagram.
February 2000
PBL 386 14/1
Subscriber Line
Interface Circuit
Applications
ISDN Network terminals
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
Linevoltage measurement
Package: 28-pin SSOP
1
Preliminary Information
VF Signal
Transmission
Off-hook
Detector
Line Feed
Controller
and
Longitudinal
Signal
Suppression
Ring Trip
Comparator
Two-wire
Interface
Input
Decoder and
Control
C1
C2
DET
REF
LP
VTX
RSN
DT
DR
TIPX
HP
RINGX
VCC
VBAT2
VBAT
AGND
C3
BGND
Ground Key
Detector
Ring Relay
Driver
RRLY
PLD
PLC
PSG
TS
VEE
PL361/
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相關(guān)代理商/技術(shù)參數(shù) |
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