ST7537HS1 datasheet(1/9 Pages) STMICROELECTRONICS

Part #	ST7537HS1

Description	HOME AUTOMATION MODEM

PDF	9 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 9 page

ST7537HS1

HOME AUTOMATION MODEM

June 1995

5

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19

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25

DVCC

RSTO

RxD

TxD

CD

Rx/Tx

WD

PAFB

ATO

PABC

TEST1

TEST2

TxIFI

PIN CONNECTIONS

PLCC28

(Plastic Chip Carrier)

ORDER CODE : ST7537HS1

.

HALF DUPLEX ASYNCHRONOUS 2400bps

FSK MODEM

.

Tx CARRIER FREQUENCY SYNTHESIZED

FROM EXTERNAL CRYSTAL

.

LOW DISTORTION Tx SIGNAL

.

Rx SENSITIVITY BETTER THAN 1mVRMS

.

CARRIER DETECTION

.

WATCH-DOG INPUT

.

RESET AND MASTER CLOCK OUTPUTS

FOR MICROCONTROLLER

.

POWER AMPLIFIER BIAS CURRENT CON-

TROL (HIGH IMPEDANCE IN Rx MODE)

.

SIMPLE AND ECONOMICAL APPLICATION

SCHEMATICS

.

COMPATIBLE WITH CENELEC EN 50065-1

AND FCC SPECIFICATION

.

CARRIER DETECT CLAMPING ON RxD

PROGRAMMABLE (ALLOWING DEMODULA-

TION ON VERY LOW RECEIVE LEVEL,

1mVRMS TYPICALLY)

DESCRIPTION

The ST7537HS1 is a half duplex asynchronous

FSK MODEM designed for home automation com-

munication on the domestic electric mains which

complies with the EN 50065-1 CENELEC stand-

ard.

It mainly operates from a 10V power supply and a

5V power supply for the microcontroller digital in-

terface.

It is interfaced to the power line by an external

driver, and a transformer (see Application Sche-

matic Diagram). Its data transmission rate is

2400 bps and its carrier frequency is 132.45kHz.

1/9

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