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STV5345

STV5345/H - STV5345/T

TELETEXT DECODER WITH 8 INTEGRATED PAGES

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COMPLETE TELETEXT DECODER INCLUD-

ING ON-CHIP 8 PAGES MEMORY, REDUC-

ING EMC RADIATIONS

UPWARD SOFTWARE AND HARDWARE

COMPATIBLE WITH PREVIOUS SGS-THOM-

SON鈥檚 DECODER SDA5243

DIRECT INTERFACE TO AN EXTERNAL

STATIC RAM OF 8kBYTES FOR UP TO 16

PAGES APPLICATION

AUTOMATIC SELECTION OF UP TO SIX NA-

TIONAL LANGUAGES

FOUR SIMULTANEOUS PAGE REQUESTS

DISPLAY OF THE 25TH STATUS ROW

MICROPROCESSOR CONTROL VIA AN I

2

C

BUS (SLAVE ADDRESS 0010001 R/W)

DATA ACQUISITION AVAILABLE FROM

LINES 2 TO 22 OR FROM A COMPLETE

FIELD

HIGH QUALITY DISPLAY USING A CHARAC-

TER MATRIX OF 12 x 10 DOTS

SINGLE + 5V SUPPLY VOLTAGE

ON-CHIP MASK PROGRAMMABLE ROM

CHARACTER GENERATORS

HCMOS PROCESS

DIP40

(Plastic Package)

ORDER CODE :

STV5345

STV5345/H

STV5345/T

West European

East European

Turkish & European

PIN CONNECTIONS

V

DD

A11

1

40

A10

A9

2

3

4

5

6

39

38

37

36

35

A12

OE

WE

TTD

A8

A7

A6

A5

A4

DESCRIPTION

The STV5345 is a HCMOS integrated circuit which

performs all the processing of logical data within a

625 lines system teletext decoder. It is designed to

operate in conjunction with one-chip : the SAA5231

integrated chip which extracts Teletext information

embedded in a composite video signal. Up to 8

pages of display data can be stored in internal

memory. Using 8Kbytes of external memory leads

to a 16 pages application. A complete system also

comprises a microprocessor controlling the

STV5345 via a 2-wires serial bus. An on-chip ROM

memory contains the character sets. The STV5345

performs automatic selection of one of up to six

natural languages. Data bytes may be decoded in

either 7-Bit plus parity or in full 8-Bit formats. The

chip set also supports facilities for reception and

display of higher-level protocol data.

April 1994

TTC

7

8

9

10

11

12

34

33

32

31

30

29

ODD/EVEN

F6

VCS

SAN D

TCS/SCS

R

A3

A2

A1

A0

D7

D6

13

14

15

16

17

28

27

26

25

24

G

B

COR

B LA N

Y

D5

D4

D3

D2

D1

18

19

20

23

22

21

SCL

SDA

D0

V

SS

5345-01.EPS

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