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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： | 17/36頁 |
| 文件大?。?/td> | 489K |
| 代理商： | L8574D |
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Lucent Technologies Inc.
17
Data Sheet
October 1998
Relay, and Protector (SRP) for Long Loop and TR-57 Applications
L8574D Resistive Subscriber Line Interface Circuit (SLIC), Ring
Operating States
(continued)
Disconnect State
I
Forward disconnect state.
I
The receive transmission path is powered down; the
transmit path is powered up.
I
The current limiter is powered down and disabled.
I
SW1, SW2, and SW3 are open.
I
Pins PT, PR, and V
BF
are high impedance
(>100 k
).
I
NSTAT is forced high (on-hook).
Alternate Talk State
I
Alternate talk state.
I
The battery feed is connected to the high battery
supply (V
BAT1
).
I
The receive and transmit transmission paths are both
powered up.
I
The current limiter is powered up and active.
I
SW1 and SW2 are closed; SW3 is open.
I
NSTAT reflects the status of the switchhook detector.
Talk State
I
Normal talk state.
I
The battery feed is connected to the high battery
supply (V
BAT2
).
I
The receive and transmit transmission paths are both
powered up.
I
The current limiter is powered up and active.
I
SW2 is closed; SW1 and SW3 are open.
I
NSTAT reflects the status of the switchhook detector.
Scan Current-Limit State
I
Alternate on-hook supervision state.
I
Same as scan state but with the current limiter pow-
ered up and active.
I
The receive transmission path is powered down; the
transmit path is powered up.
I
SW1 is closed; SW2 and SW3 are open.
I
NSTAT reflects the status of the switchhook detector.
Ringing State
I
Normal ringing state.
I
The receive and transmit transmission paths are both
powered down.
I
SW3 is closed; SW1 and SW2 are open.
I
The current limiter is powered down and disabled.
I
NSTAT reflects the status of the ring trip detector.
On-Hook Transmission State
I
Normal on-hook transmission state.
I
The battery feed is connected to the high battery
supply (V
BAT1
).
I
The receive and transmit transmission paths are both
powered up.
I
The current limiter is powered down and disabled.
I
A 10 mA dc bias current flows out of the Ring current
driver into PR, and a 5 mA dc bias current flows into
the Tip current driver from PT (the switchhook detec-
tor is adjusted to compensate for this dc bias cur-
rent).
I
SW1 and SW2 are closed; SW3 is open.
I
NSTAT reflects the status of the switchhook detector.
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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: |
| L8576B | 制造商:AGERE 制造商全稱:AGERE 功能描述:Dual Ringing SLIC |
| 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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