參數(shù)資料
型號： 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、振鈴繼電器和保護器)
中文描述： 電阻用戶線接口電路（SLIC），環(huán)繼電器和保護（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，振鈴繼電器和保護器）
文件頁數(shù)： 9/34頁
文件大?。?/td> 564K
代理商： L7597
Lucent Technologies Inc.
9
Advance Data Sheet
March 1997
Relay, and Protector (SRP) for Short Loop and TA-909 Applications
L7597 Resistive Subscriber Line Interface Circuit (SLIC), Ring
Electrical Characteristics
(continued)
Ring Trip Detector
Table 3. Ring Trip Detector
1. The ringing source consists of the ac and dc voltages added together (battery backed ringing); the ringing return is battery ground.
2. Pretrip: Ringing must not be tripped by a 10 k
resistor in parallel with a 6
μ
F capacitor applied across Tip and Ring.
Battery Feed
Table 4. Battery Feed
1. Assumes 2 x 200
external dc feed resistors.
2. When the current-limit circuit is active and the battery switch is off, the longitudinal current must be less than the dc loop current to ensure
proper ac transmission.
3. Assumes CLIM = 0.1
μ
F; CLIM determines the ac output impedance of the current-limit circuit when it is active.
4. Detector values are independent of office battery and are valid over the entire range of V
BATH
and V
BATL
. However, NSTAT must indicate an on
hook (NSTAT = 1) if either V
BATH
or V
BATL
is disconnected (open circuit) from its dc source and an off hook at the power supply pins as follows
(the pins of supplies that have more than one pin are shorted together): when CS is high (thermal shutdown = 0 V). V
BATH
and V
BATL
are
defined as disconnected depending on the voltage at the power supply pins as follows (the pins of supplies that have more than one pin are
shorted together):
— If V
BATH
≤
–20 V (i.e., more negative than –20 V) and V
BATL
≤
–20 V, then NSTAT must operate normally.
— If V
BATH
≥
–10 V (i.e., more positive than –10 V) or V
BATL
≥
–10 V, then NSTAT must be on hook (NSTAT = 1).
5. IEEEis a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.
6. Assumes the external dc feed resistors are matched to 0.4% and proper battery noise cancellation; i.e., a 0.1
μ
F capacitor from V
BF
to CBN.
7. Assumes proper battery noise cancellation; i.e., a 0.1
μ
F capacitor from V
BF
to CBN.
Parameter
Min
17
–36
60
1330
—
—
Typ
Max
28
–57
105
Unit
Hz
V
Vrms
Ringing Source
1
:
Frequency (f)
dc Voltage
ac Voltage
Ring Trip
2
(NSTAT = 0):
Loop Resistance
Trip Time (f = 20 Hz)
NSTAT Valid
20
—
—
—
—
—
—
200
80
ms
ms
Parameter
Min
Typ
Max
Unit
Loop Resistance Range
1
(3.17 dBm overload into 600 W):
I
LOOP
= 20 mA at V
BATL
= –24.2 V
I
LOOP
= 25 mA at V
BATL
= –25.5 V
Longitudinal Current Capability per Wire
2
dc Loop Current Limit (R
LOOP
= 200 W)
Current-limiter ac Output Impedance
3
:
200 Hz to 4 kHz
Current-limiter Transient Current
(In response to a step voltage change on V
BF
)
Switchhook Detector Loop Resistance
4
:
Off Hook (NSTAT = 0)
On Hook (NSTAT = 1)
Longitudinal to Metallic Balance—IEEE
5
Std. 455
6
:
200 Hz to 1 kHz
1 kHz to 3 kHz
Metallic to Longitudinal (Harm) Balance
7
:
200 Hz to 4 kHz
700
525
8.5
23.75
—
8
—
—
—
25
—
—
—
—
—
mArms
mA
mA
26.25
50
150
—
—
5000
4000
—
—
—
3000
—
50
45
—
—
—
—
dB
dB
30
—
—
dB
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