參數(shù)資料
型號: 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): 11/32頁
文件大?。?/td> 570K
代理商: MC33121
MC33121
MOTOROLA
11
Figure 23. IC Power Dissipation versus
Loop Resistance and RRF
Figure 24. Transistor Power Dissipation
versus Loop Resistance and RRF
Figure 25. Maximum Longitudinal Current
versus Loop Current
Figure 26. Maximum Longitudinal Current
versus CT, RT and Frequency
0.7
0
0.6
0.5
0.2
400
600
800
RL, LOOP RESISTANCE (
)
0.4
0
0.3
0.2
0
200
400
600
800
RL, LOOP RESISTANCE (
)
50
20
40
30
20
0
30
40
IL, LOOP CURRENT (mA)
20
16
12
8.0
0
4.0
RRF = 3900
VEE = –28 V
TA = 25
°
C
VDD = +5.0 V
VEE = –28 V
TA = 25
°
C
RP = 100
RRF = 3.9 k
0.4
0.3
I
0.1
P
6.2 k
10 k
10
–42 V
VEE
–24 V
f = 60 Hz AND 1.0 kHz
CT > 0.1
μ
F FOR 1.0 kHz
CT > 1.0
μ
F FOR 60 Hz
RS = 5.1 k
0.1
1.0
10
CT (
μ
F)
VEE = –28 V
TA = 25
°
C
IL = 20 mA
RS = 9.1 k
RT = 200 k
f = 1.0 kHz
M
200
RRF = 6200
RRF = 10 k
RS = 11 k
CT
ST2
RT
RT = 20 k
f = 1.0 kHz
RT = 20 k
f = 60 Hz
RT = 200 k
f = 60 Hz
M
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