cf8224c Nippon Precision Circuits Inc, (NPC), cf8224c Datasheet - Page 3
cf8224c
Manufacturer Part Number
cf8224c
Description
Dual-tone Receiver Ic
Manufacturer
Nippon Precision Circuits Inc, (NPC)
Datasheet
1.CF8224C.pdf
(11 pages)
- Current page: 3 of 11
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BLOCK DIAGRAM
AGND
RING
TRQ
DTQ
DT1
DT2
TIP
OSCIN OSCOUT
Oscillator
Crystal
Circuit
Circuit
Bias
Filter
MODE
Power-down
Circuit
(2130Hz)
(2750Hz)
S1 S0
Filter
Filter
Filter
SM8224C
Demodulator
Detector
Carrier
FSK
(2130Hz)
(2750Hz)
Detector
Detector
Detector
Detector
Circuit
Circuit
Level
Level
Time-constant
SEIKO NPC CORPORATION —3
Output
Circuit
Circuit
VDD
GND
DOUT
CDET
STR
CR
DTDET
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