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參數資料
| 型號： | MC33121P |
| 廠商： | MOTOROLA INC |
| 元件分類： | 模擬傳輸電路 |
| 英文描述： | LOW VOLTAGE SUBSCRIBER LOOP INTERFACE CIRCUIT |
| 中文描述： | TELECOM-SLIC, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數： | 27/32頁 |
| 文件大小： | 570K |
| 代理商： | MC33121P |
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MC33121
MOTOROLA
27
CIRCUIT PERFORMANCE
The following three circuits are presented as typical ap-
plication examples, and the accompanying graphs indicate
their measured performance. The first circuit (Figure 46) has
a 600
pure resistance as the AC load. The second circuit
(Figures 47) has as an AC load a 900
resistor in series with
a 2.16
μ
F capacitor. The third circuit (Figure 48) has as an
AC load, a complex network composed of an 820
resistor
in parallel with 0.115
μ
F, and those in series with a 220
re-
sistor. In the graphs of Figures 49 – 51, RL = Return Loss,
THR = Transhybrid Rejection, GTX = Transmit Gain, GRX =
Receive Gain.
Figure 46. 600
System
20
0.01
100
1.0 k, 2%
TIP
RING
RAC
600
–28 V
VCC
EP
BP
CP
TSI
RSI
CN
BN
EN
VEE
VDD
PDI
ST1
VDG
VAG
RXI
RFO
TXO
CF
VQB
15
+5.0 V
ST2/PDI
ST1
RECEIVE
IN (VRX)
4.7 k
20.3 k
1.0
μ
F
1.0
μ
F
10
μ
F
20
TRANSMIT
OUT (VTX)
30.6 k
MC33121
19
12
18
13
17
14
16
9
5
10
4
8
3
11
2
7
1
6
9.1 k
9.1 k
0.01
100
1.0 k, 2%
0.1
VEE
VEE
MJD253
MJD243
0.1
5.0
μ
F
600
0.005
600
31.6 k
1.0
μ
F
10 k
300
+
–
15.8 k
VL
Figure 47. 900
and 2.16
μ
F System
20
0.01
100
1.0 k, 2%
TIP
RING
RAC
900
2.16
μ
F
–28 V
VCC
EP
BP
CP
TSI
RSI
CN
BN
EN
VEE
VDD
PDI
ST1
VDG
VAG
RXI
RFO
TXO
CF
VQB
15
+5.0 V
ST2/PDI
ST1
RECEIVE
IN (VRX)
4.7 k
31.2 k
1.0
μ
F
1.0
μ
F
10
μ
F
20
TRANSMIT
OUT (VTX)
45.9 k
MC33121
19
12
18
13
17
14
16
9
5
10
4
8
3
11
2
7
1
6
9.1 k
9.1 k
0.01
100
1.0 k, 2%
0.1
VEE
VEE
MJD253
MJD243
0.1
5.0
μ
F
31.6 k
10 k
300
42 nF
31.6 k
62 nF
+
–
VL
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