CF8223A Ver la hoja de datos (PDF) - Nippon Precision Circuits

Número de pieza

componentes Descripción

Fabricante

CF8223A

FSK Decoder and DTMF Receiver IC

Nippon Precision Circuits  

SM8223A

OSCIN input timing (when external input)

tWL

tWH

VDD

OSCIN

VSS

tf

tr

FSK receive timing (1)

Tip/Ring

1st Ring

Ch. seizure Mark Data packet

1010101... 111... Data

2nd Ring

RDET

DV

FSK/DTMF

DOUT

PDWN

OSCOUT

tDED

tAF

tDPD

tDOSC

tHF

tADD

Data

Data output has

no Ch.seizure signal.

FSK receive timing (2)

Start bit LSB

MSB Stop bit

Tip/Ring

b6 b7 1 0 b0 b1 b2 b3 b4 b5 b6 b7 1 0 b0 b1

tADD

DOUT b4 b5 b6 b7 1 0 b0 b1 b2 b3 b4 b5 b6 b7 1 0 b0 b1

NIPPON PRECISION CIRCUITS—7

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