SGS Thomson Microelectronics TDA4433 Datasheet

TDA4433

TV SIGNALIDENTIFICATIONCIRCUITAND AFC INTERFACE

.

IDENTIFICATION OF TRUE TV STATIONS
ONLY

.

LOW IMPEDANCE OUTPUT OF THE IDENTI­FICATIONSIGNAL

.

DIGITAL CONTROL SIGNAL FOR AUTOMAT­IC SEARCHAND AFCOPERATION

.

THERMAL COMPENSATION OF THE VOLT­AGEREGULATOR

DIP14

(Plastic Package)

DESCRIPTION

The TDA4433 is a monolithicintegratedcircuitin a
14 lead dual-in-line plastic package. It integrates
the followingfunctions:

- TV signalidentificator-Sync.separator- Thresh­olddetector- DigitalInterface- Voltageregulator.

PINCONNECTIONS

V

OUTPUT A

AFC ”S” CURVEINPUT

STABILIZED VOLTAGE OUT

IDENTIFICATION TIME CONSTANT

OUTPUT B

N.C.

1

S

2
3
4
5
6
7

14
13
12
11
10

ORDER CODE : TDA4433

GND
VIDEO SIGNAL INPUT
H FLYBACKINPUT
SENSITIVITY CONTROL
IDENTIFICATION SIGNAL OUTPUT

9

N.C.

8

N.C.

December 1992

4433-01.EPS

1/5

TDA4433

BLOCK DIAGRAM

* Open collectoroutputs

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V
V

V

I

6;I2

I
I
I

P

T

stg,Tj

13

10
11
12

tot

Supply Voltage(pin 1) 16 V

s

Voltage at Pin 3 16 V

3

Voltage at Pin 13 –5, + 6 V
Pin 6 and Pin 2 Current 1 mA
Pin 10Current 2 mA
Pin 11Current 2 mA
Pin 12Current ±
Total Power Dissipation at T

amb

≤ 70 °C

2

800 mW

Storage and Junction Temperature – 40,+150 °

THERMALDATA

Symbol Parameter Value Unit

R

th j-amb

Thermal Resistance Junction-ambient Max. 100 °

ELECTRICALCHARACTERISTICS

(refer to the testcircuit; V

=12V, T

S

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

I

s

V

V

Supply VoltageRange (pin 1) 10.8 14.5 V

s

Supply Current (pin 1) Vs= 14.5 V 30 mA
Output Voltage f

2

Output Voltage f

6

=25 °C, unlessotherwisespecified)

amb

<foI2= 1 mA Vs– 0.5 V

tuning

f

tuning=fo

f

tuning>fo
tuning<foI6

f

tuning=foI6

f

tuning>fo

= 1 mA 0.8 V
= 1 mA 0.8 V

0.8 V

0.8 V

Vs– 0.5 V

mA

C

C/W

4433-02.EPS

4433-01.TBL

4433-02.TBL

4433-03.TBL

2/5

TDA4433

ELECTRICALCHARACTERISTICS (continued)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

InputVoltage Range 4 8 V

3

V

V

∆V

∆T

V

R

V

R

V
V

R

UpperThreshold Voltage See Figure 2 V4–25 V

3U

LowerThreshold Voltage See Figure 2 V4– 425 V4–400 V4–375 mV

3L

R

InputResistance V3=V

3

Regulated Voltage I4= 1 mA 6.6 V

V

4

I

Output Current 1mA

4

R

Output Differential Resistance 60

4

4

Regulated Voltage Thermal Drift

S

IdentificationOutput Voltage No Identification, I10= 1 mA Vs– 1.3 V

10

4

1.4

V4+25 mV

4

± 2 mV/°C

Identification 20 mV

Output Resistance 100 Ω

10

Switch off Threshold Voltage 1 V

12

I

InputFlyback Current 0.5 1.5 mA

12

InputResistance V12=3V 10

12

Flyback Pulse Duration 10 17 µ

t

fly

t Time Delay between Leading Edges

0 3.5 µ

of Flyback Pulse and Sync.Pulse
Video InputSignal (peak to peak) 2.5 4.5 V

13

Sync. Pulse Amplitude

13

(aboveblack level)
InputResistance 1.5

13

0.52 V

MΩ

Ω

kΩ
sec.
sec.

kΩ

4433-04.TBL

Figure 1 : MediumOutputVoltagevs. Supply

Voltage

Input Voltage (V3) Output Voltage (V2) Output Voltage (V6)

V

3>V4

– 0.4 V < V3<V

V

4

V

– 0.4 V Low Level High Level

2<V4

4

Figure2 : DigitalAFCThreshold Voltage vs.

Frequency

4433-03.EPS

High level Low Level
Low Level Low Level

4433-04.EPS

4433-05.TBL

3/5

TDA4433

TEST CIRCUIT

0or 3V(DC)

Hor. Flyback in

0or 3V(DC)

Pos.Video in

S1 A: Statictests

B: Functional tests

A : DC or pulses width

S2

B: Functional tests

P1 DigitalAFCperfecttuning

P2 Sensitivity control

47nF

5.6kΩ

A

B

150pF

6141

S1a

12 2

TDA4433

S1b

13

3 4 11 5

82kΩ

47kΩ

S1c

P1

22kΩ

S1d S1e S2

3.3kΩ

6.2kΩ

56kΩ

10kΩ

100kΩ

P2

0.1µF

10

AB

5kΩ

22nF

11kΩ

11kΩ

11kΩ

Digital AFC
out TDA4433

+V = 12V

S

Identif.out

H

(no ident.)

H

H

L

(ident.)

out B

out A

L

L

APPLICATIONINFORMATION

(refer to theblock diagram)

TV Signal Identification Circuit

The circuitrecognizesonly TVsignalsbychecking
logically during one line the coincidence between
the horizontalflybackpulse andthe pulse detected
by a sync. separator.

The signalidentification is carried out by charging
the capacitorconnectedto pin 5 ; when thecapaci­torvoltage overcomesa fixed threshold voltage, a
Schmitttrigger switches andenablesthe AFC con­trol. If a TV signal is recognized, the capacitor is
slightlycharged every line and its voltage reaches
thethresholdafter a numberoflinewhichis defined
by the value of the capacitoritself. The sensitivity
of the identification circuit, hence the number of
lines requiredto charge the capacitor,can be ad­justedby meansoftheresistorconnectedbetween
pin 11 and ground.

When the identification has been made, a signal
(level L) is availableat pin 10.

ThresholdCircuit

The circuit detects3 rangesof AFC voltageand in
combinationwith theTV signal identificationcircuit
drivesthe electronicswitches.

With a correct TV signal, the output levels corre­spondingto the3 ranges are :

–δf

f

o

f

o

+ δf

f

o

(V2)(V

High Level Low Level

Low Level Low Level
Low Level High Level

)

6

TheTDA4433has twoseparateoutputswhichcan
have only two states, high (H) or low (L). The
outputs at pin 2 and at pin 6 remain at a low level
withno videosignal inputor with avideo signalnot
identifiedas a trueTV signal.Both pin 2 andpin 6
are open collector outputs and must be pulled-up
to the positivesupplyvoltage by externalresistors.

Voltage Regulator

Thecircuit can deliver 1 mAand it can be used as
D/Aconverterreference to supply fine tuning volt­age.

EPM SYSTEM CONFIGURATIONS

With microprocessor

TDA4433 µP

M206µP interface

4433-05.EPS

4433-05.EPS

4/5

PACKAGE MECHANICAL DATA

14 PINS- PLASTICDIP

I

a1

TDA4433

b1

E

Dimensions

L

e3

B

D

e

Z

F

Z

b

14 8

17

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

PM-DIP14.EPS

DIP14.TBL

Information furnishedis believed to be accurate andreliable. However, SGS-THOMSONMicroelectronics assumes noresponsibility
for the consequences of use of such information norfor any infringement ofpatents or other rights ofthird partieswhich may result
from itsuse. Nolicence is granted by implication orotherwise under any patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previouslysupplied. SGS-THOMSON Microelectronics products are not authorizedfor useas critical components in life
support devices or systems without express written approval ofSGS-THOMSON Microelectronics.

 1994 SGS-THOMSON Microelectronics - All RightsReserved

Purchase of I

2

I

C Patent. Rights to use these components in a I2C system, isgranted provided that the system conforms to

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5/5