SM8223A Datasheet, PDF (14/15 Pages) Nippon Precision Circuits Inc – FSK Decoder and DTMF Receiver IC

SM8223A
TYPICAL APPLICATION CIRCUIT
TIP
VS
RING
C1 R1
D1
R2
C1 R1
D1
R4
D1
R2
R3
R5
C2
D1
C3 R6
D1
D2
D2
R7
R9
C3
D2
D2 ^R8
C4
R6
TIP
VDD
RING
DV
GS
AGND
RDIN
DOUT
FSK/
DTMF
IC
RDRC OSCIN
RDET OSCOUT
PDWN GND
C5
X'tal
Symbol
Rating
Unit
R ₁₁
240
kΩ
R ₂₁
34
kΩ
R ₃₁
464
kΩ
R ₄₁
53.6
kΩ
R ₅₁
60.4
kΩ
D₁
1N4003
–
C₁
22
nF
C₂
0.1
µF
R ₆₂
430
kΩ
R ₇₂
270
kΩ
R ₈₂
27
kΩ
R ₉₂
270
kΩ
C₃
22
nF
C ₄₂
470
nF
D₂
1N4004
–
C₅
0.1
µF
VS
–
–
X’tal
3.579545
MHz
1. Refer to the Input Differential Amplifier.
2. Refer to the Ring Signal Detector.
NIPPON PRECISION CIRCUITS—14