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參數(shù)資料
| 型號(hào)： | L7554 |
| 英文描述： | L7554 Low-Power SLIC |
| 中文描述： | L7554低功耗用戶接口 |
| 文件頁(yè)數(shù)： | 11/28頁(yè) |
| 文件大?。?/td> | 486K |
| 代理商： | L7554 |
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Data Sheet
March 1997
Lucent Technologies Inc.
11
L7554 Low-Power SLIC
Electrical Characteristics
(continued)
Table 9. Logic Inputs and Outputs
All outputs except RGDET are open-collector with internal pull-up resistor. RGDET is open-collector without inter-
nal pull-up.
Parameter
Symbol
Min
Typ
Max
Unit
Input Voltages
Low Level (permissible range)
High Level (permissible range)
V
IL
V
IH
–0.5
2.0
0.4
2.4
0.7
V
CC
V
V
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)
I
IL
I
IH
—
—
–115
–60
–200
–100
μ
A
μ
A
Output Voltages (open-collector with internal pull-up
resistor)
Low Level (V
CC
= 4.75 V, I
OL
= 360
μ
A)
High Level (V
CC
= 4.75 V, I
OH
= –20
μ
A)
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.
12-2572 (C)
Figure 3. Ring Trip Circuits
RING
RING
RING
100
10 k
6 μF
TIP
TIP
TIP
2 μF
200
SWITCH CLOSES < 12 ms
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