CF8224C View Datasheet(PDF) - Nippon Precision Circuits

Part Name

Description

MFG CO.

CF8224C

Dual-Tone Receiver IC

Nippon Precision Circuits  

1 2 3 4 5 6 7 8 9 10

BLOCK DIAGRAM

SM8224C

TIP

RING

TRQ

DT1

DT2

DTQ

AGND

Filter

Bias

Circuit

Crystal

Oscillator

Circuit

Filter

FSK

Demodulator

Carrier

Detector

Filter

(2130Hz)

Filter

(2750Hz)

Power-down

Circuit

Detector

Circuit

(2130Hz)

Level

Detector

Detector

Circuit

(2750Hz)

Level

Detector

Output

Circuit

DOUT

CDET

Time-constant

Circuit

STR

CR

DTDET

OSCIN OSCOUT

MODE S1 S0

VDD GND

SEIKO NPC CORPORATION —3

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