INTEGRATED CIRCUITS
DATA SHEET
SAA5231
Teletext video processor
Product specification
File under Integrated Circuits, IC02
November 1986
Philips Semiconductors
Product specification
Teletext video processor
GENERAL DESCRIPTION
SAA5231
The SAA5231 is a bipolar integrated circuit intended as a successor to the SAA5030. It extracts Teletext Data from the
video signal, regenerates Teletext Clock and synchronizes the text display to the television syncs. The integrated circuit
is intended to work in conjunction with CCT (Computer Controlled Teletext), EUROM or other compatible devices.
Features
•
Adaptive data slicer
•
Data clock regenerator
•
Adaptive sync separator, horizontal phase detector and 6 MHz VCO forming display phase locked loop (PLL)
QUICK REFERENCE DATA
Supply voltage (pin 16)
Supply current (pin 16)
Video input amplitude (pin 27) (peak-to-peak value)
pin 2 LOW
pin 2 HIGH
Storage temperature range
Operating ambient temperature range
PACKAGE OUTLINE
28-lead dual in-line; plastic (SOT117); SOT117-1; 1996 November 14
V
27-13(p-p)
V
27-13(p-p)
T
stg
T
amb
typ.
typ.
1 V
2,5 V
0 to
+
70
°C
V
CC
I
CC
typ.
typ.
12 V
70 mA
-20 to
+
125
°C
November 1986
2
k, full pagewidth
November 1986
sandcastle
input pulse
(PL/CBB)
24
21
HORIZONTAL
PHASE
DETECTOR
17
VOLTAGE
CONTR.
OSCILLATOR
6 MHz clock
output
(F6)
10
20
18
16
PULSE
GENERATOR
23
22
19
(VCR)
VCC
(+12 V)
video recorder
mode input
Philips Semiconductors
video composite
sync output
(VCS)
text
composite
sync input
25
Teletext video processor
(TCS)
or
scan
composite
sync input
28
(SCS)
SENSE
'NO INPUT'
SAA5231
ADAPTIVE
DATA
SLICER
LATCHES
15
teletext data
output
(TTD)
composite
video
input
DUAL
POLARITY
BUFFER
CLOCK
PHASE
DETECTOR
27
ADAPTIVE
SYNC
SEPARATOR
26
SENSE
'NO LOAD'
SENSE
EXTERNAL
DATA
HF LOSS
COMPENSATOR
3
4
1
5
6
8
7
9
PHASE
SHIFTER
14
teletext clock
output
(TTC)
12
3
sync output
external
data input
GAIN
SWITCH
OSCILLATOR
÷
2
11
13
2
video input
level select
MGH184
Product specification
SAA5231
Fig.1 Block diagram.
Philips Semiconductors
Product specification
Teletext video processor
PINNING
SAA5231
handbook, full pagewidth
sync output 1
video input level select 2
HF filter 3
store HF 4
store amplitude 5
store zero level 6
external data input 7
text composite sync input (TCS)
or
28 scan composite sync input (SCS)
27 composite video input
26 black level
25 video composite sync output (VCS)
24 pulse timing capacitor
23 pulse timing resistor
22 sandcastle input pulse (PL/CBB)
SAA5231
data timing 8
store phase 9
VCR 10
crystal 11
clock filter 12
ground 13
clock output (TTC) 14
MGH185
21 filter 1
20 oscillator input
19 filter 2
18 oscillator output
17 6 MHz output (F6)
16 supply VCC
15 data output (TTD)
Fig.2 Pinning diagram.
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
Supply voltage (pin 16)
Storage temperature range
Operating ambient temperature
V
CC
T
stg
T
amb
max.
13,2 V
−
20 to
+
125
°C
0 to
+
70
°C
November 1986
4
Philips Semiconductors
Product specification
Teletext video processor
SAA5231
CHARACTERISTICS
V
CC
= 12 V; T
amb
= 25
°C
with external components as shown in application circuits unless otherwise stated.
PARAMETER
Supply
(pin 16)
Supply voltage
Supply current
Video input and sync separator
Video input amplitude (sync to white)
(peak-to-peak value)
video input select level LOW (pin 2)
video input select level HIGH (pin 2)
Source impedance
Sync amplitude (peak-to-peak value)
Video input level select
Input voltage LOW
Input voltage HIGH
Input current LOW
Input current HIGH
Text composite sync input (TCS)
Input voltage LOW
Input voltage HIGH
Scan composite sync input (SCS)
Input voltage LOW
Input voltage HIGH
Select video sync from pin 1
Input current (pin 28)
at V
28
= 0 to 7 V
at V
28
= 10 V to V
CC
Video composite sync output (VCS)
Output voltage LOW
Output voltage HIGH
D.C. output current LOW
D.C. output current HIGH
Sync separator delay time
V
25-13
V
25-13
I
25
I
25
t
d
0
2,4
−
−
0,25
−
−
−
−
0,35
0,4
5,5
0,5
−1,5
0,40
V
V
mA
mA
µs
I
28
I
28
−40
−5
−70
−
−100
+
5
µA
µA
V
28-13
V
28-13
0
3,5
−
−
1,5
7,0
V
V
V
28-13
V
28-13
0
2,0
−
−
0,8
7,0
V
V
V
2-13
V
2-13
I
2
I
2
0
2,0
0
0
−
−
−
−
0,8
5,5
−150
1
V
V
µA
mA
V
27-13(p-p)
V
27-13(p-p)
Z
s
V
27-13(p-p)
0,7
1,75
−
0,1
1
2,5
−
−
1,4
3,5
250
1
V
V
Ω
V
V
CC
I
CC
10,8
50
12,0
70
13,2
105
V
mA
SYMBOL
MIN.
TYP.
MAX.
UNIT
November 1986
5
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