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參數(shù)資料
| 型號： | L7583A |
| 廠商： | Lineage Power |
| 英文描述： | Line Card Access Switch(線卡存取開關(guān)) |
| 中文描述： | 線卡接入交換機(jī)（線卡存取開關(guān)） |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 404K |
| 代理商： | L7583A |
Data Sheet
November 1999
L7583A/B/C/D Line Card Access Switch
Features
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Small size/surface-mount packaging
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Monolithic IC reliability
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Low impulse noise
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Make-before-break, break-before-make operation
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Clean, bounce-free switching
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Low, matched ON-resistance
I
Built-in current limiting, thermal shutdown, and
SLIC protection
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5 V only operation, very low power consumption
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Battery monitor, all OFF state upon loss of battery
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No EMI
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Latched logic level inputs, no driver circuitry
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Only one external protector required
Applications
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Central office
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DLC
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PBX
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DAML
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HFC/FITL
Description
The L7583A/B/C/D Line Card Access Switch is a
monolithic solid-state device providing the equivalent
switching functionality of three 2 form C switches.
The L7583 is designed to provide power ringing
access, line test access (test out), and SLIC test
access (test in) to tip and ring in central office, digital
loop carrier, private branch exchange, digitally added
main line, and hybrid fiber coax/fiber-in-the-loop ana-
log line card applications. An additional pair of solid-
state contacts are also available to provide access for
testing of the ringing generator.
The L7583A/B has seven states: the idle talk state
(line break switches closed, all other switches open),
the power ringing state (ringing access switches
closed, all other switches open), loop access state
(loop access switches closed, all switches open),
SLIC test state (test in switches closed, all other
switches open), simultaneous loop and SLIC
access state (loop and test in switches closed, all
others open), ringing generator test state (ring test
switches closed, all others open), and an all OFF
state. The seven states in the L7583A/B are also in
the L7583C/D, with an additional simultaneous test-
out and ring-test state, making the L7583C/D appro-
priate for digital loop carrier and other Bellcore TR-57
applications.
The L7583 offers break-before-make or make-before-
break switching, with simple logic level input control.
Because of the solid-state construction, voltage tran-
sients generated when switching into an inductive
ringing lead during ring cadence or ring trip are mini-
mized, possibly eliminating the need for external zero
cross switching circuitry. State control is via logic
level inputs, so no additional driver circuitry is
required.
The line break switch is a linear switch that has
exceptionally low ON-resistance and an excellent
ON-resistance matching characteristic. The ringing
access switch has a breakdown voltage rating
>480 V which is sufficiently high, with proper protec-
tion, to prevent breakdown in the presence of a tran-
sient fault condition (i.e., passing the transient on to
the ringing generator).
Incorporated into the L7583Axx and L7583Cxx is a
diode bridge/SCR clamping circuit, current-limiting
circuitry, and a thermal shutdown mechanism to pro-
vide protection to the SLIC device and subsequent
circuitry during fault conditions. This is shown in Fig-
ure 1 as version A. Positive and negative lightning is
reduced by the current-limiting circuitry and steered
to ground via diodes and the integrated SCR. Power
cross is also reduced
by
the current-limiting and ther-
mal shutdown circuits.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L7583 | Line Test,Tip/Ring, Line Card Access Switches(線測試，振鈴，線卡存取開關(guān)) |
| L7585F | Full-Feature, Low-Power SLIC and Switch(特點齊全，低功耗用戶環(huán)路接口電路和開關(guān)) |
| L7585G | Full-Feature, Low-Power SLIC and Switch(特點齊全的低功耗用戶接口和開關(guān)) |
| L7590C | Telephone Ringing Driver(電話振鈴驅(qū)動器) |
| L7591 | Subscriber Line Interface Circuit Protector(用戶線接口保護(hù)器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L7583AAJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7583AF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7583BAJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7583BF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7583CAJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
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