Datasheet > PBL38610-2

PBL38610-2

更新时间： 2022-12-09 07:15:52

品牌	Logo	应用领域
爱立信 - ERICSSON		/
页数	文件大小	规格书
18页	117K
描述
Subscriber Line Interface Circuit

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PBL38610-2 数据手册

February 1999

PBL 386 10/2

Subscriber Line

Interface Circuit

Description

Key Features

• Selectable overhead voltage principle

– All adaptive: The overhead voltage

follows 0.6 V_Peak< signals < 5 V_Peak

– Semi adaptive: The overhead voltage

follows 2.5 V_Peak< signals < 5 V_Peak

• Metering 1.6V_rms

The PBL 386 10/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated

circuit for use in PBX, Terminal adapters and other telecommunications equipment.

The PBL 386 10/2 has been optimized for low total line interface cost and a high

degree of flexibility in different applications.

The PBL 386 10/2 emulates a transformer equivalent dc-feed, programmable

between 2x25 Ω and 2x900 Ω, with short loop current limiting adjustable to max

65 mA.

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 10/2 is compatible with loop start signalling.

• High and low battery with automatic

switching

• Battery supply as low as -10V

• Only +5V in addition to GND

and battery (VEE optional)

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 line voltages are suppressed by a feedback loop in the SLIC and the

longitudinal balance specifications meet Bellcore TR909 requirements.

The PBL 386 10/2 package is 28-pin PLCC.

• 35 mW on-hook power dissipation in

active state

• Long loop battery feed tracks V_Batfor

maximum line voltage

• 44V open loop voltage @ -48 V battery

feed

• Constant loop voltage for line

leakage <5 mA

• On-hook transmission

• Full longitudinal current capability

during on-hook

Ring Relay

Driver

RRLY

• Programmable loop & ring-trip detector

threshold

Ring Trip

Comparator

• Ground key detector

• Analog temperature guard

• Integrated Ring Relay Driver

Input

Decoder and

Control

TIPX

Ground Key

Detector

RINGX

VCC

DET

Line Feed

Controller

and

Longitudinal

Signal

PSG

Two-wire

Interface

REF

PLC

VEE

Suppression

PBL

AOV

Off-hook

Detector

PLD

VBAT2

386 10/2

AGND

VTX

VBAT

VF Signal

Transmission

RSN

VEE

BGND

28-pin plastic PLCC

Figure 1. Block diagram.

12 3 4 5 6 7...18

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