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参数资料
| 型号： | ATTL7583BAJ-D |
| 厂商： | LEGERITY INC |
| 元件分类： | 通信及网络 |
| 英文描述： | SPECIALTY TELECOM CIRCUIT, PDSO28 |
| 封装： | PLASTIC, SOG-28 |
| 文件页数： | 1/21页 |
| 文件大小： | 398K |
| 代理商： | ATTL7583BAJ-D |
L7583A/B/C/D Line Card Access Switch
Document ID# 080968
Date:
Oct 31, 2002
Rev:
A
Version: 1
Distribution:
Public
Features
I
Small size/surface-mount packaging
I
Monolithic IC reliability
I
Low impulse noise
I
Make-before-break, break-before-make operation
I
Clean, bounce-free switching
I
Low, matched ON-resistance
I
Built-in current limiting, thermal shutdown, and SLIC
protection
I
5 V only operation, very low power consumption
I
Battery monitor, all OFF state upon loss of battery
I
No EMI
I
Latched logic level inputs, no driver circuitry
I
Only one external protector required
Applications
I
Central office
I
DLC
I
PBX
I
DAML
I
HFC/FITL
Description
The L7583A/B/C/D Line Card Access Switch is a mono-
lithic 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 analog line card applications. An addi-
tional pair of solid-state contacts are also available to pro-
vide 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, mak-
ing the L7583C/D appropriate 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 transients
generated when switching into an inductive ringing lead
during ring cadence or ring trip are minimized, possibly
eliminating the need for external zero cross switching cir-
cuitry. State control is via logic level inputs, so no addi-
tional driver circuitry is required.
The line break switch is a linear switch that has exception-
ally 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 protection,
to prevent breakdown in the presence of a transient fault
condition (i.e., passing the transient on to the ringing gen-
erator).
Incorporated into the L7583Axx and L7583Cxx is a diode
bridge/SCR clamping circuit, current-limiting circuitry,
and a thermal shutdown mechanism to provide protection
to the SLIC device and subsequent circuitry during fault
conditions. This is shown in Figure 1 as version A. Posi-
tive and negative lightning is reduced by the current-limit-
ing circuitry and steered to ground via diodes and the
integrated SCR. Power cross is also reduced by the cur-
rent-limiting and thermal shutdown circuits.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ATTL7583BAJ-DT | 制造商:AGERE 制造商全称:AGERE 功能描述:Line Card Access Switch |
| ATTL7583BCG | 制造商:未知厂家 制造商全称:未知厂家 功能描述:LH1263 E&M Signaling Circuit |
| ATTL7583BF | 制造商:未知厂家 制造商全称:未知厂家 功能描述:LH1263 E&M Signaling Circuit |
| ATTL7583CAJ-D | 制造商:AGERE 制造商全称:AGERE 功能描述:Line Card Access Switch |
| ATTL7583CAJDT | 制造商:AGERE 功能描述:New |
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