MC145442BDW Ver la hoja de datos (PDF) - LANSDALE Semiconductor Inc.

Número de pieza

componentes Descripción

Fabricante

MC145442BDW

Single–Chip 300–Baud Modem

LANSDALE Semiconductor Inc. 

LANSDALE Semiconductor, Inc.

ML145442, ML145443

RxA2 15

RxA1 16

TxD 11

RxA2 15

RxA1 16

TxD 11

RxA2 15

RxA1 16

TxD 11

RxA2 15

RxA1 16

TxD 11

Page 7 of 11

–

LOW–BAND

+

AAF S/H

BPF

CARRIER

DETECT

3 CD

AC

AMP

DEMOD

5 RxD

1

DSI

MODULATOR

HIGH–BAND

BPF

SMOOTHING

FILTER

–

+

(a) Originate/Channel 1 Mode (MODE = High, LB = Low)

17 TxA

18 Exl

–

AAF S/H

LOW–BAND

+

BPF

CARRIER

DETECT

3 CD

AC

AMP

DEMOD

5 RxD

1 DSI

MODULATOR

HIGH–BAND

BPF

SMOOTHING

FILTER

–

+

(b) Answer/Channel 2 Mode (MODE = Low, LB = Low)

17 TxA

18 Exl

–

+

AAF S/H

LOW–BAND

BPF

CARRIER

DETECT

AC

AMP

DEMOD

MODULATOR

HIGH–BAND

BPF

SMOOTHING

FILTER

–

+

(c) Originate/Channel 1 Mode and Analog Loopback State (MODE = High, LB = Low)

–

AAF S/H

+

LOW–BAND

BPF

CARRIER

DETECT

AC

AMP

DEMOD

MODULATOR

HIGH–BAND

BPF

SMOOTHING

FILTER

–

+

(d) Answer/Channel 2 Mode and Analog Loopback State (MODE = Low, LB = Low)

Figure 4. Basic Operating Modes

www.lansdale.com

3 CD

5 RxD

1 DSI

17 TxA

18 Exl

3 CD

5 RxD

1 DSI

17 TxA

18 Exl

Issue b

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