參數(shù)資料
型號(hào)： L7597
廠商： Lineage Power
英文描述： Resistive Subscriber Line Interface Circuit (SLIC), Ring Relay, and Protector (SRP) for Short Loop and TA-909 Applications(用于短環(huán)路和TA-909的電阻性用戶線接口、振鈴繼電器和保護(hù)器)
中文描述： 電阻用戶線接口電路（SLIC），環(huán)繼電器和保護(hù)（SRP）的短環(huán)路和TA - 909應(yīng)用（用于短環(huán)路和電訊- 909的電阻性用戶線接口，振鈴繼電器和保護(hù)器）
文件頁(yè)數(shù)： 17/34頁(yè)
文件大?。?/td> 564K
代理商： L7597
Lucent Technologies Inc.
17
Advance Data Sheet
March 1997
Relay, and Protector (SRP) for Short Loop and TA-909 Applications
L7597 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).
Talk/High Battery State
I
Alternate talk state.
I
The battery feed is connected to the high battery
supply (V
BATH
).
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 low battery sup-
ply (V
BATL
).
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 connected to the high battery sup-
ply (V
BATH
).
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.
Intermediate Talk State
I
Talk state with an increased and current-limited out-
put impedance.
I
Same as talk state.
I
The current limiter is powered up and active.
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 and current limiter are adjusted to compensate for
this dc bias current).
I
SW2 is closed; SW1 and SW3 are open.
I
NSTAT reflects the status of the switchhook detector.
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