SM8224BS データシートの表示（PDF） - Nippon Precision Circuits

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SM8224BS

Dual-Tone Receiver IC

Nippon Precision Circuits  

BLOCK DIAGRAM

SM8224B

TIP

RING

TRQ

DT1

DT2

DTQ

AGND

Filter

FSK

Demodulator

Carrier

Detector

Filter

(2130Hz)

Filter

Bias

Circuit

Crystal

Oscillator

Circuit

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

NIPPON PRECISION CIRCUITS—3

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