MC145442B データシートの表示（PDF） - Motorola => Freescale

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MC145442B

Single–Chip 300–Baud Modem

Motorola => Freescale 

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Single-Chip 300-Baud Modem

The MC145442B and MC145443B silicon–gate CMOS single–chip low–

speed modems contain a complete frequency shift keying (FSK) modulator,

demodulator, and filter. These devices are compatible with CCITT V.21

(MC145442B) and Bell 103 (MC145443B) specifications. Both devices provide

full–duplex or half–duplex 300–baud data communication over a pair of

telephone lines. They also include a carrier detect circuit for the demodulator

section and a duplexer circuit for direct operation on a telephone line through a

simple transformer.

• MC145442B Compatible with CCITT V.21

• MC145443B Compatible with Bell 103

• Low–Band and High–Band Band–Pass Filters On–Chip

• Simplex, Half–Duplex, and Full–Duplex Operation

• Originate and Answer Mode

• Analog Loopback Configuration for Self Test

• Hybrid Network Function On–Chip

• Carrier Detect Circuit On–Chip

• Adjustable Transmit Level and CD Delay Timing

• On–Chip Crystal Oscillator (3.579 MHz)

• Single +5 V Power Supply Operation

• Internal Mid–Supply Generator

• Power–Down Mode

• Pin Compatible with MM74HC943

• Capable of Driving –9 dBm into a 600 Ω Load

Order this document

by MC145442B/D

MC145442B

MC145443B

20

1

P SUFFIX

PLASTIC DIP

CASE 738

20

1

DW SUFFIX

SOG PACKAGE

CASE 751D

ORDERING INFORMATION

MC145442BP

MC145443BP

Plastic DIP

Plastic DIP

MC145442BDW SOG Package

MC145443BDW SOG Package

PIN ASSIGNMENT

DSI 1

LB 2

CD 3

CDT 4

RxD 5

VDD 6

CDA 7

Xout 8

Xin 9

FB 10

20 TLA

19 VAG

18 Exl

17 TxA

16 RxA1

15 RxA2

14 SQT

13 MODE

12 VSS

11 TxD

REV 1

9/00

©MMOoTtoOrolRa, OIncL. A2000

MC145442B•MC145443B

1

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