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PBL38630-2

Ericsson
Part Number PBL38630-2
Manufacturer Ericsson
Description Subscriber Line Interface Circuit
Published Mar 22, 2005
Detailed Description March 2000 PBL 386 30/2 Subscriber Line Interface Circuit Description The PBL 386 30/2 Subscriber Line Interface Circui...
Datasheet PDF File PBL38630-2 PDF File

PBL38630-2
PBL38630-2

Overview
March 2000 PBL 386 30/2 Subscriber Line Interface Circuit Description The PBL 386 30/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated circuit for use in Digital Loop Carrier, FITL and other telecommunications equipment.
The PBL 386 30/2 has been optimized for low total line interface cost and a high degree of flexibility in different applications.
The PBL 386 30/2 emulates resistive loop feed, programmable between 2x50 Ω and 2x900 Ω, 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 and ring trip detection functions.
The PBL 386 30/2 is compatible with loop 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 impendance, 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 the DLC requirements.
The PBL 386 30/2 package options are 24-pin SSOP, 24-pin SOIC and 28-pin PLCC.
Key Features • 24-pin SSOP package • High and low battery supply with automatic switching • 65 mW on-hook power dissipation in active state • On-hook transmission • Long loop battery feed tracks Vbat for maximum line voltage • Only +5 V feed in addition to battery • Selectable transmit gain (1x or 0.
5x) • No power-up sequence • Programmable signal headroom • 43V open loop voltage @ -48V battery feed • Constant loop voltage for line leakage <5 mA (RLeak ~ >10 kΩ...


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