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參數(shù)資料
| 型號(hào)： | MC33121 |
| 廠商： | Motorola, Inc. |
| 英文描述： | LOW VOLTAGE SUBSCRIBER LOOP INTERFACE CIRCUIT |
| 中文描述： | 低電壓用戶環(huán)路接口電路 |
| 文件頁數(shù)： | 9/32頁 |
| 文件大小： | 570K |
| 代理商： | MC33121 |
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MC33121
MOTOROLA
9
R
,
Figure 11. Fault Threshold (On–Hook) versus RS
Figure 12. Fault Threshold (Off–Hook)
versus Loop Resistance
Figure 13. Fault Threshold (Off–Hook)
versus Loop Resistance
Figure 14. Fault Threshold (Off–Hook)
versus Loop Resistance
Figure 15. Fault Threshold (Off–Hook) versus RS
Figure 16. VDD Ripple Rejection versus Frequency
4.0
5.0
3.5
3.0
2.5
1.0
7.0
9.0
11
RS, SENSE RESISTANCE (k
)
3.0
0
2.4
1.8
1.2
0
500
1000
1500
2000
RL, LOOP RESISTANCE (
)
3.0
0
2.4
1.8
1.2
0
200
400
600
800
RL, LOOP RESISTANCE (
)
3.0
2.4
1.8
1.2
0
1.0
5.0
0.8
0.6
0.4
0
7.0
9.0
RS, SENSE RESISTANCE (k
)
80
0.02
40
20
0.1
10
20
f, FREQUENCY (kHz)
0.6
11
R
TIP–TO–VEE
VEE = –24 V
TA = 25
°
C
RL = OPEN
VEE = –42 V
TA = 25
°
C
RING–TO–GROUND
AND/OR TIP–TO–VEE
RS = 11 k
TA = 25
°
C
200
< RL < 800
(SEE TEXT)
RING–TO–VEE
VEE = –24 V
2.0
1.5
R
,
TIP–TO–VEE
VEE = –42 V
RING–TO–GROUND
VEE = –24 V
RING–TO–GROUND
VEE = –42 V
0.6
9.1 k
7.5 k
5.1 k
0.6
VEE = –28 V
TA = 25
°
C
RING–TO–GROUND
AND/OR TIP–TO–VEE
RS = 11 k
9.1 k
7.5 k
5.1 k
0
200
400
600
800
RL, LOOP RESISTANCE (
)
VEE = –24 V
TA = 25
°
C
RING–TO–GROUND
AND/OR TIP–TO–VEE
RS = 11 k
9.1 k
7.5 k
5.1 k
0.2
RING–TO–VEE
VEE = –42 V
TIP–TO–GROUND
–24 V
≤
VEE
≤
–42 V
60
1.0
VEE = –24 V
TA = 25
°
C
20 mA
≤
IL
≤
40 mA
4–WIRE
2–WIRE
R
,
R
,
R
,
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