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| 型號(hào)： | CMX469AE2 |
| 英文描述： | MODEM |
| 中文描述： | 調(diào)制解調(diào)器 |
| 文件頁(yè)數(shù)： | 6/16頁(yè) |
| 文件大?。?/td> | 475K |
| 代理商： | CMX469AE2 |
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1200/2400/4800 Baud FFSK/MSK Modem
CMX469A
2001 Consumer Microcircuits Limited
7
D/469A/2
1.4
External Components
Component
R1
C1
C2
C3
C4
C5
C6
C7
X1
Value
1.0M
33.0pF
1.0μF
0.1μF
0.1μF
1.0μF
1.0μF
33.0pF
1.008MHz
or
4.032MHz
Notes:
1. V
BIAS
may be decoupled to V
SS
and V
DD
using C2 and C6 when input signals are referenced to the V
BIAS
pin. For input signals referenced to V
SS
, decouple V
BIAS
to V
SS
using C2 only.
2. The performance of the Carrier Detect function will be affected by the nature of the noise spectrum in the
received channel. The value of C4 determines the Carrier Detect Time Constant. A long time constant
results in improved noise immunity but increased response time. C4 may be varied to trade-off response
time for noise immunity.
3. A 4.032MHz Xtal/clock is required for 4800 Baud operation.
Figure 2 Recommended External Components
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