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參數(shù)資料
| 型號： | L7581 |
| 廠商： | Lineage Power |
| 英文描述： | Ringing Access Switch(振鈴存取開關(guān)) |
| 中文描述： | 振鈴接入交換機(jī)（振鈴存取開關(guān)） |
| 文件頁數(shù)： | 6/16頁 |
| 文件大小： | 304K |
| 代理商： | L7581 |
6
Lucent Technologies Inc.
Data Sheet
November 1999
L7581 Ringing Access Switch
Electrical Characteristics
(continued)
Table 8. Additional Electrical Characteristics
* Temperature shutdown flag (TSD) will be high during normal operation and low during temperature shutdown state.
Parameter
Test Condition
Measure
Min
Typ
Max Unit
Digital Input Characteristics:
Input Low Voltage
Input High Voltage
Input Leakage Current (high)
—
—
—
—
—
3.5
—
—
—
—
1.5
—
1
V
V
μA
V
DD
= 5.5 V, V
BAT
= –75 V,
Vlogicin = 5 V
V
DD
= 5.5 V, V
BAT
= –75 V,
Vlogicin = 0 V
llogicin
Input Leakage Current (low)
llogicin
—
—
1
μA
Power Requirements:
Power Dissipation
V
DD
= 5 V, V
BAT
= –48 V,
Idle/talk state or all OFF state,
ringing state
V
DD
= 5 V,
Idle/talk state or all OFF state,
ringing state
V
BAT
= –48 V,
Idle/talk state or all OFF state,
ringing state
I
DD
, I
BAT
I
DD
—
—
3
6
5
10
mW
mW
V
DD
Current
I
DD
I
DD
—
—
560
0.750
900
1.9
μA
mA
V
BAT
Current
I
BAT
I
BAT
—
—
4
4
10
10
μA
μA
Temperature Shutdown Requirements:*
Shutdown Activation Temperature
Shutdown Circuit Hysteresis
—
—
—
—
110
10
125
—
150
25
°C
°C
Zero Cross Current Turn Off
The ring access switch (SW4) is designed to turn off on
the next zero current crossing after application of the
appropriate logic input control. This switch requires a
current zero cross to turn off. Switch 4, once on, will
remain in the ON state (regardless of logic input) until a
current zero cross. Therefore, to ensure proper opera-
tion of switch 4, this switch should be connected, via
proper impedance, to the ringing generator or some
other ac source. Do not attempt to switch pure dc with
switch 4.
For a detailed explanation of the operation of switch 4,
please refer to the An Introduction to L758X Series of
Line Card Access SwitchesApplication Note.
Switching Behavior
When switching from the power ringing state to the idle/
talk state via simple logic level input control, the L7581
is able to provide control with respect to the timing
when the ringing access contacts are released relative
to the state of the line break contacts.
Make-before-break operation occurs when the line
break switch contacts are closed (or made) before the
ringing access switch contact is opened (or broken).
Break-before-make operation occurs when the ringing
access contact is opened (broke) before the line break
switch contacts are closed (made).
Using the logic level input pins INPUT and T
SD
, either
make-before-break or break-before-make operation of
the L7581 is easily achieved. The logic sequences for
either mode of operation are given in Table 9 and Table
10. See the Truth Table (Table 12) for an explanation of
the logic states.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L7582 | Ring Access Switch(振鈴存取開關(guān)) |
| L7583B | Line Card Access Switch(線卡存取開關(guān)) |
| L7583C | Line Card Access Switch(線卡存取開關(guān)) |
| L7583D | Line Card Access Switch(線卡存取開關(guān)) |
| L7583A | Line Card Access Switch(線卡存取開關(guān)) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L7581AAE | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7581AC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7581BAE | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7581BC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7582 | 制造商:AGERE 制造商全稱:AGERE 功能描述:Tip Ring Access Switch |
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