cf8223a Nippon Precision Circuits Inc, (NPC), cf8223a Datasheet - Page 6

• Manufacturer Part Number: cf8223a
• Description: Fsk Decoder And Dtmf Receiver Ic
• Manufacturer: Nippon Precision Circuits Inc, (NPC)

OSCIN input timing (when external input)
FSK receive timing (1)
FSK receive timing (2)
FSK/DTMF
OSCOUT
OSCIN
Tip/Ring
PDWN
DOUT
RDET
Tip/Ring
DV
DOUT
V
V
DD
SS
b4 b5 b6 b7
b6 b7 1
1st Ring
t
f
Start bit
t
0 b
ADD
t
DOSC
1
Ch. seizure Mark Data packet
1010101... 111...
t
0
DPD
0
t
LSB
WL
b
CF8223A
1
t
b
DED
0
b
t
2
AF
b
1
b
3
b
2
b
4
t
b
f
3
b
5
b
t
WH
4
MSB
t
b
Data
ADD
6
Data
b
5
b
7
b
NIPPON PRECISION CIRCUITS INC.—6
Stop bit
6
1
b
7
0 b
1
t
Data output has
HF
0
0
no Ch.seizure signal.
b
1
b
2nd Ring
0.7V
0.5V
0.3V
0
b
1
DD
DD
DD