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參數資料
| 型號： | L8574D |
| 英文描述： | CAP 15PF 50V 5% C0G SMD-0402 TR-7-PA SN100 |
| 中文描述： | L8574D電阻用戶線接口電路（SLIC），環繼電器和保護（SRP）的為遠距離和TR - 57應用 |
| 文件頁數： | 10/36頁 |
| 文件大小： | 489K |
| 代理商： | L8574D |
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10
Lucent Technologies Inc.
Data Sheet
October 1998
Relay, and Protector (SRP) for Long Loop and TR-57 Applications
L8574D Resistive Subscriber Line Interface Circuit (SLIC), Ring
Electrical Characteristics
(continued)
Fault Protection
(continued)
Loss of Power Supplies
The L8574 must protect itself from lightning and power cross voltages on Tip and Ring if any (or any combination)
of the power supplies (V
CCA
, V
DD
, V
BAT1
, and V
BAT2
) are disconnected (open circuit) from their dc source. Addition-
ally, if any power supply is disconnected, no overvoltage on Tip or Ring can cause a supply voltage to exceed its
maximum rating. Under these conditions, V
CCA
and V
DD
are considered as one supply (V
CCA
shorted to V
DD
), the
pins of supplies which have more than one pin are shorted together, and bypass capacitors are connected. To sat-
isfy these requirements (and also to disconnect ringing from the loop when ring trip cannot be detected), the L8574
is placed into the disconnect state depending on the voltage at the power supply pins as shown in Table 6.
Table 6. Loss of Power Supplies
Parameter
Min
Typ
Max
Unit
V
CCA
and V
DD
:
Normal Operating State (as defined by control logic)
Disconnect State
V
BAT1
:
Normal Operating State (as defined by control logic)
Disconnect State
Disconnect State
1
—
—
—
—
4.5
V
V
–10
—
–65
—
—
—
–75
–20
—
V
V
V
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相關代理商/技術參數 |
參數描述 |
|---|---|
| L8575 | 制造商:Leviton Manufacturing Co 功能描述: |
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| L8576BP | 制造商:Alcatel-Lucent 功能描述: 制造商:LUCENT 功能描述: |
| L85J250E | 制造商:Ohmite Mfg Co 功能描述: |
| L8601-01 | 制造商:HAMAMATSU 制造商全稱:Hamamatsu Corporation 功能描述:90KV MICROFOCUS X-RAY SOURCE |
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