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參數(shù)資料
| 型號： | L7557 |
| 廠商： | Lineage Power |
| 英文描述： | Low-Power SLICs （electronic subscriber loop interface circuits ）with Battery Switch(帶電池開關(guān)的低功耗用戶環(huán)路線接口電路（SLIC）) |
| 中文描述： | 低功耗SLIC組件（電子用戶環(huán)路接口電路）與電池開關(guān)（帶電池開關(guān)的低功耗用戶環(huán)路線接口電路電路（SLIC）） |
| 文件頁數(shù)： | 11/28頁 |
| 文件大?。?/td> | 753K |
| 代理商： | L7557 |
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Data Sheet
January 2000
Lucent Technologies Inc.
11
with Battery Switch
L7556, L7557 Low-Power SLICs
Electrical Characteristics
(continued)
Table 9. Logic Inputs and Outputs
All outputs except RGDET and L
BAT
are open collectors with internal, 30 k
pull-up resistor. RGDET and L
BAT
are
open collectors without internal pull-up. Input pin B1 has a 40 k
pull-up; it goes low in the event of thermal shut-
down.
Parameter
Symbol
Min
Typ
Max
Unit
Input Voltages:
Low Level (permissible range)
High Level (permissible range)
Input Currents:
Low Level (V
CC
= 5.25 V, V
I
= 0.4 V)
High Level (V
CC
= 5.25 V, V
I
= 2.4 V)
Output Voltages (open collector with internal pull-up resistor):
Low Level (V
CC
= 4.75 V, I
OL
= 360 μA)
High Level (V
CC
= 4.75 V, I
OH
= –20 μA)
V
IL
V
IH
–0.5
2.0
0.4
2.4
0.7
V
CC
V
V
I
IL
I
IH
–75
–40
–115
–60
–200
–100
μA
μA
V
OL
V
OH
0
2.4
0.2
—
0.4
V
CC
V
V
Ring Trip Requirements
I
Ringing signal:
— Voltage, minimum 35
Vrms
, maximum 100
Vrms
.
— Frequency, 17 Hz to 23 Hz.
— Crest factor, 1.4 to 2.
I
Ringing trip:
—
≤
100 ms (typical),
≤
250 ms (V
BAT
= –33 V, loop
length = 530
).
I
Pretrip:
— The circuits in Figure 3 will not cause ringing trip.
12-2572g (F)
Figure 3. Ring Trip Circuits
RING
RING
RING
100
10 k
6
μ
F
TIP
TIP
TIP
2
μ
F
200
SWITCH CLOSES <12 ms
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