Datasheet > LUCL9214GAU-D

LUCL9214GAU-D

更新时间： 2024-11-20 22:16:03

品牌	Logo	应用领域
杰尔 - AGERE		电信集成电路
页数	文件大小	规格书
46页	750K
描述
Low-Cost Ringing SLIC

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LUCL9214GAU-D 数据手册

Preliminary Data Sheet

October 2001

L9214A/G

Low-Cost Ringing SLIC

Applications

Introduction

■ Voice over Internet Protocol (VoIP)

■ Cable Modems

The Agere Systems Inc. L9214 is a subscriber line

interface circuit that is optimized to provide a very

low-cost solution for short- and medium-loop applica-

tions. This device provides the complete set of line

interface functionality, including power ringing

needed to interface to a subscriber loop. This device

has the capability to operate with a V^CCsupply of

3.3 V or 5 V and is designed to minimize external

components required at all device interfaces.

■ Terminal Adapters (TA)

■ Wireless Local Loop (WLL)

■ Telcordia Technologies™ GR-909 Access

■ Network Termination (NT)

■ PBX

■ Key Systems

Features

■ Low-cost solution

Description

■ Onboard ringing generation with software adjust-

able crest factor switching

This device is optimized to provide battery feed, ring-

ing, and supervision on short- and medium-loop plain

old telephone service (POTS) loops. Supported

round trip loop length is up to 1000 Ω.

■ Flexible VCC options:

— 3.3 V or 5 V V^CC

— No –5 V required

This device provides power ring to the subscriber by

the use of line reversal to create either a sine wave

ringing signal with a PWM input or a trapezoidal ring-

ing signal with a selectable crest factor from a square

wave input. It provides forward and reverse battery

feed states, on-hook transmission, a low-power scan

state, and a forward disconnect state.

■ Power control options:

— Power control resistor

— Automatic battery switch to minimize off-hook

power

■ Eight operating states:

— Scan mode for minimal power dissipation

— Forward and reverse battery active

— On-hook transmission states

— Ring mode

The device requires a V^CCand line feed battery to

operate. V^CCmay be either a 3.3 V or a 5 V supply.

The ringing signal is derived from the high-voltage

battery. An automatic battery switch is included to

allow for use of a second lower voltage battery in the

off-hook mode, thus minimizing short-loop off-hook

power consumption and dissipation. If the user

desires single battery operation, a power resistor is

required to reduce the power dissipation in the SLIC.

— Disconnect mode

■ Low on-hook power:

— 25 mW scan mode

— 165 mW active mode

■ Two SLIC gain options to minimize external com-

ponents in codec interface

Loop closure, ring trip, and ground key detectors are

available. The loop closure detector has a fixed

threshold with hysteresis. The ring trip detector and

ground key detector threshold and time constants are

externally set.

■ Loop start, ring trip, and ground key detectors

■ Programmable current limit

■ On-hook and scan mode line voltage clamp

■ Thermal protection

The dc current limit is programmed by an external

resistor, the maximum current limit determined by the

Vcc supply.

■ 48-pin MLCC, 32-pin PLCC, and 28-pin SOG

(Please contact your Agere Sales Representative

for availability) packages

The overhead voltage for this device is fixed and the

device is capable of supporting 3.17 dB into a 600 Ω

load with minimal overhead.

The device is offered with two gain options. This

allows for an optimized codec interface, with minimal

external components regardless of whether a first-

generation or a programmable third-generation

codec is used.

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与LUCL9214GAU-D相关器件

型号	品牌	获取价格	描述	数据表
LUCL9214GAU-DT	AGERE	获取价格	Low-Cost Ringing SLIC
LUCL9214GRG-D	AGERE	获取价格	Low-Cost Ringing SLIC
LUCL9214GRG-DT	AGERE	获取价格	Low-Cost Ringing SLIC
LUCL9215AAU-D	AGERE	获取价格	Short-Loop Sine Wave Ringing SLIC
LUCL9215AAU-DT	AGERE	获取价格	Short-Loop Sine Wave Ringing SLIC
LUCL9215ARG-D	AGERE	获取价格	Short-Loop Sine Wave Ringing SLIC
LUCL9215GAU-D	AGERE	获取价格	Short-Loop Sine Wave Ringing SLIC
LUCL9215GAU-DT	AGERE	获取价格	Short-Loop Sine Wave Ringing SLIC
LUCL9215GRG-D	AGERE	获取价格	Short-Loop Sine Wave Ringing SLIC
LUCL9216AGF-D	AGERE	获取价格	Short-Loop Ringing SLIC with Ground Start

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