參數(shù)資料
型號(hào): ATTL7554AP
英文描述: L7554 Low-Power SLIC
中文描述: L7554低功耗用戶接口
文件頁數(shù): 18/28頁
文件大小: 486K
代理商: ATTL7554AP
18
Lucent Technologies Inc.
Data Sheet
March 1997
L7554 Low-Power SLIC
Applications
(continued)
Characteristic Curves
(continued)
Note: V
BAT
= –48 V.
12-3015 (C)
Figure 17. Loop Closure Program Resistor
Selection
Note: Tip lead is open; V
BAT
= –48 V.
12-3016 (C)
Figure 18. Ring Ground Detection Programming
Note: V
BAT
= –48 V; I
LIM
= 22 mA; R
DC1
= 113
.
12-3050 (C)
Figure 19. Loop Current vs. Loop Voltage
Note: V
BAT
= –48 V; I
LIM
= 22 mA; R
DC1
= 113
.
12-3051 (C)
Figure 20. Loop Current vs. Loop Resistance
0
5
20
25
0
10
20
30
60
LOOP CLOSURE THRESHOLD RESISTOR, R
LCTH
(k
)
50
15
10
40
O
(
AMBIENT TEMPERATURE, T
A
(
°
C)
20
40
60
140
180
0
500
1000
1500
2000
80
100
120
160
STILL AIR
47
°
C/W
300 cu. ft./ min.
36
°
C/W
L
0
10
20
50
0
20
30
40
50
LOOP VOLTAGE (V)
30
40
10
1
10 k
I
LIM
–1
R
DC1
LOOP RESISTANCE, R
LOOP
(
)
0
500
1000
2000
0
20
30
40
50
1500
10
L
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