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MSM7512BRS Просмотр технического описания (PDF) - Oki Electric Industry
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MSM7512BRS
1200 bps Half Duplex FSK Modem – ITU-T V.23
Oki Electric Industry
MSM7512BRS Datasheet PDF : 12 Pages
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Semiconductor
MSM7512B
Demodulator analog input (Al, EAI) characteristics
Parameter
Receive Signal
Amplitude
Receive Signal
Detect Amplitude (
CD
)
Hysteresis (
CD
)
CD
Delay Time
CD
Hold Time
Receive Data (
RD
)
Bias Distortion
Input Resistance
Symbol
V
AI
V
ON
V
OFF
V
HYS
t
CDD
t
CDH
D
BS
R
AI
R
EAI
( V
DD
= +2.7 V to +5.5 V, Top = –40°C to +85°C)
Condition
Min. Typ. Max. Unit
FSK Signal, at AI
—
—
–6 dBm
OFF
Æ
ON —
— –42 dBm
FSK Signal, (1:1) at AI
OFF
Æ
OFF –48
—
— dBm
V
ON
Æ
V
OFF
—
2
— dB
See Fig. 1
5
15
20 ms
20
40
60 ms
1200 bps, 1:1 Pattern
–10
—
10 %
AI
—
10
— M
W
EAI
20
—
— k
W
* 0 dBm = 0.775 Vrms
AI
CD
t
CDD
t
CDH
Figure 1 Carrier Detect (
CD
) Timing
7/12
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