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Компоненты Описание
SM8223A Просмотр технического описания (PDF) - Nippon Precision Circuits
Номер в каталоге
Компоненты Описание
производитель
SM8223A
FSK Decoder and DTMF Receiver IC
Nippon Precision Circuits
SM8223A Datasheet PDF : 15 Pages
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SM8223A
OSCIN input timing (when external input)
t
WL
t
WH
V
DD
OSCIN
V
SS
t
f
t
r
FSK receive timing (1)
Tip/Ring
1st Ring
Ch. seizure Mark Data packet
1010101... 111... Data
2nd Ring
RDET
DV
FSK/DTMF
DOUT
PDWN
OSCOUT
t
DED
t
AF
t
DPD
t
DOSC
t
HF
t
ADD
Data
Data output has
no Ch.seizure signal.
FSK receive timing (2)
Start bit LSB
MSB Stop bit
Tip/Ring
b
6
b
7
1 0 b
0
b
1
b
2
b
3
b
4
b
5
b
6
b
7
1 0 b
0
b
1
t
ADD
DOUT b4 b5 b6 b7 1 0 b
0
b
1
b
2
b
3
b
4
b
5
b
6
b
7
1 0 b
0
b
1
NIPPON PRECISION CIRCUITS—7
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