TDA4433
TV SIGNAL IDENTIFICATION CIRCUIT AND AFC INTERFACE
December 1992
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUTPUT A
AFC "S" CURVE INPUT
STABILIZED VOLTAGE OUT
IDENTIFICATION TIME CONSTANT
OUTPUT B
N.C.
GND
VIDEO SIGNAL INPUT
H FLYBACK INPUT
SENSITIVITY CONTROL
IDENTIFICATION SIGNAL OUTPUT
N.C.
N.C.
V
S
4433-01.EPS
PIN CONNECTIONS
DIP14
(Plastic Package)
ORDER CODE : TDA4433
.
IDENTIFICATION OF TRUE TV STATIONS
ONLY
.
LOW IMPEDANCE OUTPUT OF THE IDENTI-
FICATION SIGNAL
.
DIGITAL CONTROL SIGNAL FOR AUTOMAT-
IC SEARCH AND AFC OPERATION
.
THERMAL COMPENSATION OF THE VOLT-
AGE REGULATOR
DESCRIPTION
The TDA4433 is a monolithic integrated circuit in a
14 lead dual-in-line plastic package. It integrates
the following functions :
- TV signal identificator - Sync. separator - Thresh-
old detector - Digital Interface - Voltage regulator.
1/5
4433-02.EPS
* Open collector outputs
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
s
Supply Voltage (pin 1)
16
V
V
3
Voltage at Pin 3
16
V
V
13
Voltage at Pin 13
5, + 6
V
I
6
; I
2
Pin 6 and Pin 2 Current
1
mA
I
10
Pin 10 Current
2
mA
I
11
Pin 11 Current
2
mA
I
12
Pin 12 Current
2
mA
P
to t
Total Power Dissipation at T
amb
70
C
800
mW
T
stg
, T
j
Storage and Junction Temperature
40, +150
C
4433-01.TBL
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th j-amb
Thermal Resistance Junction-ambient
Max.
100
C/W
4433-02.TBL
ELECTRICAL CHARACTERISTICS
(refer to the test circuit ; V
S
= 12 V, T
amb
= 25
C, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
s
Supply Voltage Range (pin 1)
10.8
14.5
V
I
s
Supply Current (pin 1)
V
s
= 14.5 V
30
mA
V
2
Output Voltage
f
tuning
< fo I
2
= 1 mA
V
s
0.5
V
f
tuning
= f
o
0.8
V
f
tuning
> f
o
0.8
V
V
6
Output Voltage
f
tuning
< f
o
I
6
= 1 mA
0.8
V
f
tuning
= f
o
I
6
= 1 mA
0.8
V
f
tuning
> f
o
V
s
0.5
V
4433-03.TBL
TDA4433
2/5
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
3
Input Voltage Range
4
8
V
V
3U
Upper Threshold Voltage
See Figure 2
V
4
25
V
4
V
4
+ 25
mV
V
3L
Lower Threshold Voltage
See Figure 2
V
4
425 V
4
400 V
4
375
mV
R
3
Input Resistance
V
3
= V
4
1.4
M
V
4
Regulated Voltage
I
4
= 1 mA
6.6
V
I
4
Output Current
1
mA
R
4
Output Differential Resistance
60
V
4
T
S
Regulated Voltage Thermal Drift
2
mV/
C
V
10
Identification Output Voltage
No Identification, I
10
= 1 mA
V
s
1.3
V
Identification
20
mV
R
10
Output Resistance
100
V
12
Switch off Threshold Voltage
1
V
I
12
Input Flyback Current
0.5
1.5
mA
R
12
Input Resistance
V
12
= 3 V
10
k
t
fly
Flyback Pulse Duration
10
17
sec.
t
Time Delay between Leading Edges
of Flyback Pulse and Sync. Pulse
0
3.5
sec.
V
13
Video Input Signal (peak to peak)
2.5
4.5
V
V
13
Sync. Pulse Amplitude
(above black level)
0.52
V
R
13
Input Resistance
1.5
k
4433-04.TBL
Input Voltage (V
3
)
Output Voltage (V
2
)
Output Voltage (V
6
)
V
3
> V
4
High level
Low Level
V
4
0.4 V < V
3
< V
4
Low Level
Low Level
V
2
< V
4
0.4 V
Low Level
High Level
4433-05.TBL
4433-03.EPS
Figure 1 : Medium Output Voltage vs. Supply
Voltage
4433-04.EPS
Figure 2 : Digital AFC Threshold Voltage vs.
Frequency
TDA4433
3/5
22nF
5k
6.2k
10k
100k
56k
22k
82k
47k
3.3k
P2
P1
3
4
11
5
A
B
S1c
S1d
S1e
S2
13
12
2
10
6
14
1
TDA4433
150pF
5.6k
47nF
0 or 3V (DC)
0 or 3V (DC)
A
B
S1a
S1b
11k
11k
11k
0.1
F
+V = 12V
S
Digital AFC
out TDA4433
Identif. out
Pos. Video in
Hor. Flyback in
H
L
L
H
H
L
out B
out A
(no ident.)
(ident.)
S1 A : Static tests
B : Functional tests
B : Functional tests
S2 A : DC or pulses width
P2 Sensitivity control
P1 Digital AFC perfect tuning
4433-05.EPS
TEST CIRCUIT
APPLICATION INFORMATION
(refer to the block diagram)
TV Signal Identification Circuit
The circuit recognizes only TV signals by checking
logically during one line the coincidence between
the horizontal flyback pulse and the pulse detected
by a sync. separator.
The signal identification is carried out by charging
the capacitor connected to pin 5 ; when the capaci-
tor voltage overcomes a fixed threshold voltage, a
Schmitt trigger switches and enables the AFC con-
trol. If a TV signal is recognized, the capacitor is
slightly charged every line and its voltage reaches
the thresholdafter a number of line which is defined
by the value of the capacitor itself. The sensitivity
of the identification circuit, hence the number of
lines required to charge the capacitor, can be ad-
justed by means of the resistor connected between
pin 11 and ground.
When the identification has been made, a signal
(level L) is available at pin 10.
Threshold Circuit
The circuit detects 3 ranges of AFC voltage and in
combination with the TV signal identification circuit
drives the electronic switches.
With a correct TV signal, the output levels corre-
sponding to the 3 ranges are :
(V
2
)
(V
6
)
f
o
f
High Level
Low Level
f
o
Low Level
Low Level
f
o
+
f
Low Level
High Level
The TDA4433 has two separate outputs which can
have only two states, high (H) or low (L). The
outputs at pin 2 and at pin 6 remain at a low level
with no video signal input or with a video signal not
identified as a true TV signal. Both pin 2 and pin 6
are open collector outputs and must be pulled-up
to the positive supply voltage by external resistors.
Voltage Regulator
The circuit can deliver 1 mA and it can be used as
D/A converter reference to supply fine tuning volt-
age.
TDA4433
P
M206
P interface
With microprocessor
4433-05.EPS
EPM SYSTEM CONFIGURATIONS
TDA4433
4/5
14
8
1
7
I
a1
L
B
e
D
Z
b
Z
e3
F
b1
E
PM-DIP14.EPS
PACKAGE MECHANICAL DATA
14 PINS - PLASTIC DIP
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility
for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without not ice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.
1994 SGS-THOMSON Microelectronics - All Rights Reserved
Purchase of I
2
C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips
I
2
C Patent. Rights to use these components in a I
2
C system, is granted provided that the system conforms to
the I
2
C Standard Specifications as defined by Philips.
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Dimensions
Millimeters
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
a1
0.51
0.020
B
1.39
1.65
0.055
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
15.24
0.600
F
7.1
0.280
i
5.1
0.201
L
3.3
0.130
Z
1.27
2.54
0.050
0.100
DIP14.TBL
TDA4433
5/5
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