ATTL7554BP Agere Systems, ATTL7554BP Datasheet - Page 18

• Manufacturer Part Number: ATTL7554BP
• Description: L7554 Low-Power SLIC
• Manufacturer: Agere Systems

L7554 Low-Power SLIC
Applications
Characteristic Curves
Note: V
Figure 17. Loop Closure Program Resistor
Note: Tip lead is open; V
18
Figure 18. Ring Ground Detection Programming
2000
1500
1000
500
BAT
0
25
20
15
10
20
5
0
= –48 V.
0
LOOP CLOSURE THRESHOLD RESISTOR, R
Selection
40
10
AMBIENT TEMPERATURE, T
(continued)
60
BAT
= –48 V.
20
80
STILL AIR
47 C/W
(continued)
100
30
120
40
A
140
300 cu. ft./ min.
36 C/W
( C)
50
LCTH
160
12-3015 (C)
12-3016 (C)
(k )
180
60
Note: V
Note: V
Figure 20. Loop Current vs. Loop Resistance
Figure 19. Loop Current vs. Loop Voltage
50
40
30
20
10
BAT
BAT
0
50
40
30
20
10
0
0
= –48 V; I
= –48 V; I
0
LIM
LIM
10
500
LOOP RESISTANCE, R
= 22 mA; R
= 22 mA; R
10 k
1
LOOP VOLTAGE (V)
20
DC1
DC1
1000
Lucent Technologies Inc.
= 113 .
= 113 .
30
LOOP
R
March 1997
1500
–1
( )
DC1
Data Sheet
40
I
LIM
12-3050 (C)
12-3051 (C)
2000
50