TELETEXT DECODER. STV5342 Datasheet

STV5342 DECODER. Datasheet pdf. Equivalent

STV5342 Datasheet
Recommendation STV5342 Datasheet
Part STV5342
Description TELETEXT DECODER
Feature STV5342; STV5342 TELETEXT DECODER WITH 4 INTEGRATED PAGES . COMPLETE TELETEXT DECODER INCLUD. ING ON-CHIP 4.
Manufacture STMicroelectronics
Datasheet
Download STV5342 Datasheet





STMicroelectronics STV5342
STV5342
TELETEXT DECODER WITH 4 INTEGRATED PAGES
. COMPLETE TELETEXT DECODER INCLUD-
. ING ON-CHIP 4 PAGES MEMORY, REDUC-
ING EMC RADIATIONS
UPWARD SOFTWARE AND HARDWARE
COMPATIBLE WITH PREVIOUS SGS-THOM-
SON’s DECODER SDA5243
. AUTOMATIC SELECTION OF UP TO SIX NA-
TIONAL LANGUAGES
. 4 SIMULTANEOUS PAGE REQUESTS
. DISPLAY OF THE 25TH STATUS ROW
. MICROPROCESSOR CONTROL VIA AN I2C
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 : STV5342
PIN CONNECTIONS
VD D
1
2
40
39
RESERVED
3
4
38
37
5 36
TTD
6
35
TTC
7
34
DESCRIPTION
The STV5342 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 4
pages of display data can be stored in internal
memory. A complete system also comprises a mi-
croprocessor controlling the STV5342 via a 2-wires
serial bus. An on-chip ROM memory contains the
character sets. The STV5342 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.
ODD/EVEN
F6
VCS
S AN D
TCS/ SCS
R
G
B
COR
BL AN
Y
SCL
SDA
8
9
10
11
12
13
14
15
16
17
18
19
20
33
32
31 RESERVED
30
29
28
27
26
25
24
23
22
21 VSS
April 1994
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STMicroelectronics STV5342
STV5342
PIN DESCRIPTION
Pin
1
2 to 5
22 to 40
6
Symbol
VDD
RESERVED
TTD
7 TTC
8 ODD/EVEN
9 F6
10 VCS
11 SAND
12 TCS/SCS
13,14,15
16
17
18
19
20
21
RGB
COR
BLAN
Y
SCL
SDA
VSS
Function
+5V
Description
Positive supply voltage
Not used
Teletext data input
Teletext clock input
Interlaced mode state output
Character display clock signal
Video composite
synchronization input signal
Sandcastle
Input / output composite
synchronization signal
Red, green, blue
Contrast reduction
Blanking signal output
Foreground output
Serial clock
Serial data input / output
0 Volt
An A.C. coupled teletext data input supplied by the
SAA5231 chip is latched to VSS between 4 and 8µs
after each TV line.
A 6.9375MHz clock signal, supplied by the SAA5231
chip, is internally A.C. coupled, clamped and
buffered.
High for even numbered and low for odd numbered
frames. The value is valid 2µs before the end of
lines 311 and 624.
The 6MHz clock signal, supplied by the SAA5231
chip is internally A.C. coupled, clamped and buffered.
Active high VCS input.
Three level output pulse to the SAA5231 device.
Phase lock, blanking signal, and color burst
components are contained in this signal.
Scan composite input signal (SCS) for the display
synchronization or Text composite sync. (TCS)
output signal to the SAA5231. Both signals are
active low.
Character and background colors active-high
open-drain outputs.
Open-drain active-low output supporting optimal
display of characters in ”mixed mode” operation.
Open-drain active high output for TV-image blanking
in normal and mixed-mode operation.
Open-drain active-high output with foreground
information. Can be used for printer command.
Microprocessor clock input via serial bus.
Open-drain microprocessor serial data input/output
via serial bus.
Ground
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STMicroelectronics STV5342
BLOCK DIAGRAM
F6 9
VCS
10
SAND
11
TCS/
SCS
12
TIME BASE
DATA
CLOC K
EXTERNAL
MEMORY
INTERFACE
STV5342
Pins 22 to 40 and
Pins 2 to 5 not used
TTC 7
TTD 6
DATA ACQUISITION
&
DATA PROCESSING
4 PAGES
INTERNAL
MEMORY
SCL 19
SDA 20
I 2 C BUS
INTERFACE
1
VD D
21
V SS
DISPLAY &
CONTROL
INTERFACE
13 RED
14 GREEN
15 BLUE
18 17 16 8
Y BLAN COR ODD/
EVEN
ABSOLUTE MAXIMUM RATINGS
Symbol
VDD
Power Supply Range
Parameter
INPUT VOLTAGE RANGE :
VI VCS,SDA,SCL,D0-D7
VI TTD,F6,TCS/SCS,TT C
OUTPUT VOLTAGE RANGE :
VO SAND,SDA,ODD/EVEN,R,G,B
VO BLAN,COR, Y, TCS/SCS
Tstg Storage Temperature Range
TA Operating Ambient Temperature Range
ELECTRICAL CHARACTERISTICS
VDD = 5V, VSS = 0V, TA = - 20 to + 70oC
Symbol
VDD
IDD
Parameter
Supply Voltage (Pin 1)
Supply Current (operating mode)
Value
-0.3, +6.0
-0.3, VDD + 0.5
-0.3, +10
-0.3 , VDD
-0.3 , VDD
-20, +125
-20, +70
Unit
V
V
V
V
V
oC
oC
Min Typ Max Unit
4.5 5 5.5 V
15 40 mA
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