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參數(shù)資料
| 型號： | L9214A |
| 廠商： | Lineage Power |
| 英文描述： | Low-Cost Ringing SLIC(低價格振鈴用戶環(huán)路接口電路) |
| 中文描述： | 低成本振鈴用戶接口（低價格振鈴用戶環(huán)路接口電路） |
| 文件頁數(shù)： | 1/44頁 |
| 文件大小： | 964K |
| 代理商： | L9214A |
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Preliminary Data Sheet
October 2000
L9214A/G
Low-Cost Ringing SLIC
Introduction
The L9214 is a subscriber line interface circuit that is
optimized to provide a very low-cost solution for
short- and medium-loop applications. This device
provides the complete set of line interface functional-
ity, including power ringing needed to interface to a
subscriber loop. This device has the capability to
operate with a V
CC
supply of 3.3 V or 5 V and is
designed to minimize external components required
at all device interfaces.
Features
I
Low-cost solution
I
Onboard ringing generation with software adjust-
able crest factor switching
I
Flexible V
CC
options
— 3.3 V or 5 V V
CC
— No –5 V required
I
Power control options
— Power control resistor
— Automatic battery switch to minimize off-hook
power
I
Eight operating states
— Scan mode for minimal power dissipation
— Forward and reverse battery active
— On-hook transmission states
— Ring mode
— Disconnect mode
I
Low on-hook power
— 25 mW scan mode
— 165 mW active mode
I
Two SLIC gain options to minimize external com-
ponents in codec interface
I
Loop start, ring trip, and ground key detectors
I
Programmable current limit
I
On-hook and scan mode line voltage clamp
I
Thermal protection
I
28-pin SOG and 32-pin PLCC packages
Applications
I
Voice over Internet Protocol (VoIP)
I
Cable Modems
I
Terminal Adapters (TA)
I
Wireless Local Loop (WLL)
I
Network Termination (NT)
I
PBX
I
Key Systems
Description
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
.
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.
The device requires a V
CC
and line feed battery to
operate. V
CC
may 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.
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.
The dc current limit is programmed by an external
resistor, the maximum current limit determined by the
Vcc supply.
The overhead voltage for this device is fixed and the
device is capable of supporting 3.17 dB into a 600
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.
相關PDF資料 |
PDF描述 |
|---|---|
| L9214G | Low-Cost Ringing SLIC(低價格振鈴用戶環(huán)路接口電路) |
| L9215G | Short-Loop Sine Wave Ringing SLIC(短環(huán)路正弦波振鈴用戶接口（SLIC）) |
| L9215A | Short-Loop Sine Wave Ringing SLIC(短環(huán)路正弦波振鈴用戶接口（SLIC）) |
| L9216A | Short-Loop Ringing SLIC with Ground Start(接地起動的短環(huán)路振鈴用戶接口) |
| L9216G | Short-Loop Ringing SLIC with Ground Start(接地起動的短環(huán)路振鈴用戶接口) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L9215A | 制造商:AGERE 制造商全稱:AGERE 功能描述:Short-Loop Sine Wave Ringing SLIC |
| L9216A | 制造商:AGERE 制造商全稱:AGERE 功能描述:Short-Loop Ringing SLIC with Ground Start |
| L9217A | 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and PPM |
| L9218A | 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface |
| L9219A | 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and Dual Current Limit |
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