參數(shù)資料
型號(hào): MC33121FN
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, PQCC28
封裝: PLASTIC, LCC-28
文件頁數(shù): 5/32頁
文件大小: 570K
代理商: MC33121FN
MC33121
MOTOROLA
5
Figure 1. Test Circuit
20
IEP
0.01
RP
100
RC
1.0 k
RS
TIP
IL
RING
RL
–24 V
VCC
EP
BP
CP
TSI
RSI
CN
BN
EN
VEE
VDD
ST2/PDI
ST1
VDG
VAG
RXI
RFO
TXO
CF
VQB
15
+5.0 V
PDI/ST2
ST1
IRXI
RRX
RECEIVE
IN (VRXI)
RRF
4.7 k
RRO
20.3 k
CRO
1.0
μ
F
2.0 k
301
1.0
μ
F
CCF
1.0
μ
F
20
CQB (10
μ
F)
TRANSMIT
OUT (VTX)
+10.13 dB
CT
0.1
30.9 k
MC33121
19
12
18
13
17
14
16
9
5
10
4
8
3
11
2
7
1
6
9.1 k
RS
9.1 k
RC
1.0 k
VL
RP
100
0.01
Components shown for a 600
system.
Three grounds are connected directly together.
Figure 2. Longitudinal Balance Test
(Per IEEE–455)
TIP
RING
VCM
2.0
μ
F
1.0 Vrms
368
0.01%
VTX
0 dB DIFF.
AMPLIFIER
V4
V2
4–Wire Balance = 20 (log V4/VCM)
2–Wire Balance = 20 (log V2/VCM)
368
0.01%
MC33121 TEST CIRCUIT
(FIGURE 1)
Figure 3. Signal Balance Test
TIP
RING
VB
368
0.01%
VRXI
Vin
0 dBm
1.0 kHz
368
0.01%
MC33121 TEST CIRCUIT
(FIGURE 1)
Signal Balance = 20 (log VB/Vin)
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