參數(shù)資料
型號: L8551
廠商: Lineage Power
英文描述: Low-Power SLIC(低功耗用戶線接口(SLIC))
中文描述: 低功耗用戶接口(低功耗用戶線接口電路(SLIC))
文件頁數(shù): 11/32頁
文件大?。?/td> 526K
代理商: L8551
Data Sheet
March 1997
Lucent Technologies Inc.
11
L8551 Low-Power SLIC
Electrical Characteristics
(continued)
Table 9. Logic Inputs and Outputs
All outputs except RGDET are open collectors with internal, 30 k
pull-up resistor. RGDET is an open collector
without internal pull-up. Input pin B1 has a 40 k
pull-up; it goes low in the event of thermal shutdown.
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
–50
–35
–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 V
rms
, maximum 100 V
rms
— 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 4 will not cause ringing trip.
12-2572 (C)
Figure 4. 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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