CF8223A View Datasheet(PDF) - Nippon Precision Circuits

Part Name

Description

MFG CO.

CF8223A

FSK Decoder and DTMF Receiver IC

Nippon Precision Circuits  

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DTMF receive timing (1)

SM8223A

tPR

Tip/Ring

DTMF Data #1

#1

tRE

DV

tAF

FSK/DTMF

tBDD

DOUT

Data #1

tDPD

PDWN

tDOSC

OSCOUT

tPA

tRE

DTMF Data #2

Data #2

DTMF receive timing (2)

DV

DOUT

tBDD

0 Q0 Q1 Q2 Q3 S0 S1 S2 S3 1

Start bit DTMF data

Checksum

(2'mod16)

Stop bit

(FSK/DTMF) DOUT output timing

DOUT

tDf0

tDWL

tDWH

tDr0

90%

10%

NIPPON PRECISION CIRCUITS—8

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