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May 2004
STV5348
STV5348/H - STV5348/T
MONOCHIP TELETEXT AND VPS DECODER
WITH 8 INTEGRATED PAGES
REV. 2
FEATURES SUMMARY
COMPLETE TELETEXT AND VPS DECODER
INCLUDING AN 8 PAGE MEMORY ON A
SINGLE CHIP
UPWARD SOFTWARE COMPATIBLE WITH
PREVIOUS ST's MULTICHIP SOLUTIONS
(SAA5231, SDA5243, STV5345)
PERFORM PDC SYSTEM A (VPS) AND PDC
SYSTEM B (8/30/2) DATA STORAGE
SEPARATELY
DEDICATED "ERROR FREE" OUTPUT FOR
VALID PDC DATA
INDICATION OF LINE 23 FOR EXTERNAL
USE
SINGLE +5V SUPPLY VOLTAGE
SINGLE 13.875MHz CRYSTAL
REDUCED SET OF EXTERNAL
COMPONENTS, NO EXTERNAL
ADJUSTMENT
OPTIMIZED NUMBER OF DIGITAL SIGNALS
REDUCING EMC RADIATION
HIGH DENSITY CMOS TECHNOLOGY
DIGITAL DATA SLICER AND DISPLAY
CLOCK PHASE LOCK LOOP
28 PIN DIP & SO PACKAGE
DESCRIPTION
The STV5348 decoder is a computer-controlled
teletext device including an 8 page internal mem-
ory. Data slicing and capturing extracts the teletext
information embedded in the composite video sig-
nal. Control is accomplished via a two wire serial
I
2
C bus . Chip address is 22h. Internal ROM pro-
vides a character set suitable to display text using
up to seven national languages. Hardware and
software features allow selectable master/slave
synchronization configurations. The STV5348
also supports facilities for reception and display of
current level protocol data.
Figure 1. Package
Figure 2. Pin Connections
PDIP28 (Plastic Package)
SO28 (Plastic Package)
1
2
3
4
5
6
28
27
26
25
24
23
7
8
9
22
21
20
10
19
11
18
12
17
13
16
14
15
R
B
G
V
DDA
CVBS
MA/SL
POL
STTV/LFB
V
SSD
FFB
RGB REF
BLAN
COR
ODD/EVEN
V
SSA
V
SSO
V
DDD
CBLK
TEST
XTI
XTO
VCR/TV
RESERVED
DV
L23
SDA
SCL
Y
STV5348 - STV5348/H - STV5348/T
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Table 1. Pin Description
Pin No
Symbol
Function
Description
Figure
1
CVBS
Input
Composite Video Signal Input through Coupling Capacitor
12
2
MA/SL
Input
Master/Slave Selection Mode
14
3
V
DD
A
Analog Supply
+5V
-
4
POL
Input
STTV / LFB / FFB Polarity Selection
15
5
STTV/LFB
Output / Input
Composite Sync Output, Line Flyback Input
18
6
FFB
Input
Field Flyback Input
15
7
VSSD
Ground
Digital Ground
-
8
R
Output
Video Red Signal
16
9
G
Output
Video Green Signal
16
10
B
Output
Video Blue Signal
16
11
RGBREF
Supply
DC Voltage to define RGB High Level
16
12
BLAN
Output
Fast Blanking Output TTL Level
18
13
COR
Output
Open Drain Contrast Reduction Output
18
14
ODD/EVEN
Output
25Hz Output Field synchronized for non-interlaced display
18
15
Y
Output
Open Drain Foreground Information Output
18
16
SCL
Input
Serial Clock Input
19
17
SDA
Input/ Output
Serial Data Input/Output
20
18
L23
Output
Line 23 Identification
18
19
DV
Output
VPS Data Valid
18
20
RESERVED
Test
To be connected to VSSD through a resistor
18
21
VCR/TV
Input
PLL Time Constant Selection
18
22
V
DD
D
Digital Supply
+5V
-
23
XTO
Crystal Output
Oscillator Output 13.875MHz
17
24
XTI
Crystal Input
Oscillator Input 13.875MHz
17
25
VSSO
Ground
Oscillator Ground
-
26
V
SSA
Ground
Analog Ground
-
27
TEST
Test
Grounded to V
SSA
14
28
CBLK
Input / Output
To connect Black Level Storage Capacitor
13
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STV5348 - STV5348/H - STV5348/T
Figure 3. Block Diagram
Table 2. Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
V
DD
Positive Supply Voltage on V
DDD
and V
DDA
0.3, 6.0
V
V
I
Input Voltage (any input)
0.3, V
DD
+ 0.5
V
V
O
Output Voltage (any output)
0.3, V
DD
+ 0.5
V
V
DD
Difference between V
DDD
, V
DDA
0.25
V
T
oper
Operating Ambient Temperature
0, +70
C
T
stg
Storage Temperature
40, +150
C
L23
18
CT
RL
Da
ta
Addr
ess
CTRL
Da
ta
Addr
ess
Data
Clock
BLAN
RED
GREEN
BLUE
Y
SCL
SDA
XTI
XTO
CVBS
TEST
RGB REF
POL
FFB
STTV/LFB
DISPLAY
INTERFACE
8 PAGES
MEMORY
DATA DECODING
DATA
PROCESSING
CLAMPING
SYNCHRONIZING
DATA EXTRACTION
27
1
28
21
24
23
25
16
17
7
26
14
11
15
10
9
8
13
12
3
22
5
6
2
4
I C BUS
INTERFACE
2
STV5348
CBLK
VCR/TV
V
SSO
V
SSD
V
SSA
ODD/EVEN
COR
V
DDA
V
DDD
MA/SL
OSCILLATOR
FREQUENCY
SYNTHETIZER
TIME BASE
19 DV
20 TEST
STV5348 - STV5348/H - STV5348/T
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ELECTRICAL CHARACTERISTICS
(V
DD
= 5V, V
SS
= 0V, T
A
= 25C)
Table 3. Supplies
Table 4. Inputs
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
DD
Supply Voltage
4.75
5.0
5.25
V
I
DDD
V
DDD
Pin Supply Current
30
mA
I
DDA
V
DDA
Pin Supply Current
5
mA
Symbol
Parameter
Min.
Typ.
Max.
Unit
CBLK
I
BLKO
Source Current (V
CBLK
= 2V, V
CVBS
= 0V)
4.75
5.0
5.25
V
I
BLKI
Sink Current (V
CBLK
= 2V, V
CVBS
= 1V))
30
mA
CVBS
CVBSI
Video Input Amplitude (peak to peak)
1
V
CVBSC
Input Capacitance
10
pF
t
SYNC
Delay from CVBS to TCS Output from STTV Pin
200
ns
V
CLAMP
Clamping Level at Synchro Pulse
0
mV
I
CLPH
High Level Clamp Current (CVBS = V
CLAMP
+ 1V)
5
A
I
CLPL
Low Level Clamp Current (CVBS = V
CLAMP
0.3V)
400
A
MA/SL, POL, LFB, FFB, VCR/TV
V
IL
Input Voltage Low Level
0.3
+0.8
V
V
IH
Input Voltage High Level
2
V
DD
V
I
IL
Input Leakage Current (V
I
= 0 to V
DDD
)
10
+10
A
C
I
Input Capacitance
10
pF
SCL, SDA
V
IL
Input Voltage Low Level
0.3
+1.5
V
V
IH
Input Voltage High Level
3
V
DD
V
I
IL
Input Leakage Current (V
I
= 0 to V
DD
)
10
+10
A
f
SCL
Clock Frequency (SCL)
100
kHz
t
R
, t
F
Input Rise and Fall Time (10 to 90%)
2
s
C
I
Input Capacitance
10
pF
RGB REF
V
I
Input Voltage
V
DD
0.5V
V
DD
V
DD
+0.3V
V
I
I
Input Current
50
mA
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STV5348 - STV5348/H - STV5348/T
Table 5. Outputs
Table 6. Crystal Oscillator
Symbol
Parameter
Min.
Typ.
Max.
Unit
RGB
V
OL
Output Low Voltage (I
OL
= 2mA)
0.4
V
V
OH
Output High Voltage (I
OH
= 2mA, RGB REF = V
DD
/2)
RGB REF 0.5
RGB REF
V
C
L
Load Capacitance
50
pF
t
R
, t
F
Rise and Fall Time (10 to 90%)
20
ns
BLAN
V
OL
Output Low Voltage (I
OL
= 2mA)
0
0.4
V
V
OH
Output High Voltage (I
OH
= 0.2mA)
V
DD
0.5
V
C
L
Load Capacitance
50
pF
t
R
, t
F
Rise and Fall Time (10 to 90%)
20
ns
ODD/EVEN, STTV, L23, DV
V
OL
Output Low Voltage (I
OL
= 2mA)
0
0.5
V
V
OH
Output High Voltage (I
OH
= 0.2mA)
V
DD
0.8
V
DD
V
C
L
Load Capacitance
50
pF
t
R
, t
F
Rise and Fall Time (10 to 90%)
20
ns
COR AND COR AND Y (with Pull up to V
DDD
)
V
OL
Output Low Voltage (I
OL
= 2mA)
0
0.5
V
C
L
Load Capacitance
25
V
t
F
Fall Time (R
L
= 1.2k
, V
DDD
0.5V to 1.5V)
50
ns
I
OLL
Output Leakage Current
10
+10
s
SDA
V
OL
Output Low Voltage (I
OL
= 3mA)
0
0.5
V
t
F
Fall Time (3.0 to 1.0V)
200
ns
C
L
Load Capacitance
400
pF
Symbol
Parameter
Min.
Typ.
Max.
Unit
f
XTAL
Crystal Frequency
13.875
MHz
R
BIAS
Internal Bias Resistance
0.4
1
3
M
C
I
Input Capacitance
7
pF
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