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| TDA4433 TV SIGNAL IDENTIFICATION CIRCUIT AND AFC INTERFACE . . . . IDENTIFICATION OF TRUE TV STATIONS ONLY LOW IMPEDANCE OUTPUT OF THE IDENTIFICATION SIGNAL DIGITAL CONTROL SIGNAL FOR AUTOMATIC SEARCH AND AFC OPERATION THERMAL COMPENSATION OF THE VOLTAGE REGULATOR DIP14 (Plastic Package) 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 - Threshold detector - Digital Interface - Voltage regulator. PIN CONNECTIONS ORDER CODE : TDA4433 VS OUTPUT A AFC "S" CURVE INPUT STABILIZED VOLTAGE OUT IDENTIFICATION TIME CONSTANT OUTPUT B N.C. 1 2 3 4 5 6 7 14 13 12 11 10 9 8 GND VIDEO SIGNAL INPUT H FLYBACK INPUT SENSITIVITY CONTROL IDENTIFICATION SIGNAL OUTPUT N.C. N.C. December 1992 1/5 4433-01.EPS TDA4433 BLOCK DIAGRAM * Open collector outputs ABSOLUTE MAXIMUM RATINGS Symbol Vs V3 V13 I6 ; I2 I10 I11 I12 Ptot Tstg, Tj Parameter Supply Voltage (pin 1) Voltage at Pin 3 Voltage at Pin 13 Pin 6 and Pin 2 Current Pin 10 Current Pin 11 Current Pin 12 Current Total Power Dissipation at Tamb 70 C Storage and Junction Temperature Value 16 16 - 5, + 6 1 2 2 2 800 - 40, +150 Unit V V V mA mA mA mA mW C THERMAL DATA Symbol R th j-amb Parameter Thermal Resistance Junction-ambient Max. Value 100 Unit C/W 4433-02.TBL 4433-03.TBL ELECTRICAL CHARACTERISTICS (refer to the test circuit ; VS = 12 V, Tamb = 25 C, unless otherwise specified) Symbol Vs Is V2 Parameter Supply Voltage Range (pin 1) Supply Current (pin 1) Output Voltage Test Conditions Vs = 14.5 V ftuning < fo I2 = 1 mA ftuning = fo ftuning > fo ftuning < fo I6 = 1 mA ftuning = fo I6 = 1 mA ftuning > fo Min. 10.8 Vs - 0.5 0.8 0.8 0.8 0.8 Vs - 0.5 Typ. Max. 14.5 30 Unit V mA V V V V V V V6 Output Voltage 2/5 4433-01.TBL 4433-02.EPS TDA4433 ELECTRICAL CHARACTERISTICS (continued) Symbol V3 V3U V3L R3 V4 I4 R4 V4 TS V10 R10 V12 I12 R12 tfly t V13 V13 R13 Parameter Input Voltage Range Upper Threshold Voltage Lower Threshold Voltage Input Resistance Regulated Voltage Output Current Output Differential Resistance Regulated Voltage Thermal Drift Identification Output Voltage Output Resistance Switch off Threshold Voltage Input Flyback Current Input Resistance Flyback Pulse Duration Time Delay between Leading Edges of Flyback Pulse and Sync. Pulse Video Input Signal (peak to peak) Sync. Pulse Amplitude (above black level) Input Resistance 0.5 V12 = 3 V 10 0 2.5 0.52 10 17 3.5 4.5 No Identification, I10 = 1 mA Identification Vs - 1.3 20 100 1 1.5 Test Conditions See Figure 2 See Figure 2 V3 = V4 I4 = 1 mA Min. Typ. Max. 4 8 V4 - 25 V4 V4 + 25 V4 - 425 V4 - 400 V4 - 375 1.4 6.6 1 60 2 Unit V mV mV M V mA mV/C V mV V mA k sec. sec. V V k 1.5 Figure 1 : Medium Output Voltage vs. Supply Voltage Figure 2 : Digital AFC Threshold Voltage vs. Frequency 4433-03.EPS Input Voltage (V3) V3 > V4 V4 - 0.4 V < V3 < V4 V2 < V4 - 0.4 V Output Voltage (V2) High level Low Level Low Level Output Voltage (V6) Low Level Low Level High Level 4433-05.TBL 3/5 4433-04.EPS 4433-04.TBL TDA4433 TEST CIRCUIT H out B 11k Digital AFC L out TDA4433 H out A L +VS = 12V 0.1F 6 0 or 3V (DC) A B Hor. Flyback in 14 1 2 11k S1a 12 0 or 3V (DC) S1b 5.6k TDA4433 13 3 47nF S1c 150pF S1d S1e A S2 B 4 11 5 10 11k (no ident.) H Identif. out L (ident.) Pos. Video in S1 A : Statictests B : Functional tests 3.3k S2 A : DC or pulses width B : Functional tests P1 Digital AFC perfect tuning P2 Sensitivity control 82k 10k 47k 22k 6.2k P2 100k 5k 22nF 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 capacitor voltage overcomes a fixed threshold voltage, a Schmitt trigger switches and enables the AFC control. 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 adjusted 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 corresponding to the 3 ranges are : fo - f fo fo + f (V2) High Level Low Level Low Level (V6) Low Level 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 voltage. EPM SYSTEM CONFIGURATIONS With microprocessor TDA4433 P P interface M206 4/5 4433-05.EPS 4433-05.EPS P1 56k TDA4433 PACKAGE MECHANICAL DATA 14 PINS - PLASTIC DIP a1 I b Z e3 B e Z L b1 E D 14 8 F 1 7 Dimensions a1 B b b1 D E e e3 F i L Z Min. 0.51 1.39 Millimeters Typ. Max. 1.65 Min. 0.020 0.055 Inches Typ. Max. 0.065 0.5 0.25 20 8.5 2.54 15.24 7.1 5.1 3.3 1.27 2.54 0.050 0.020 0.010 0.787 0.335 0.100 0.600 0.280 0.201 0.130 0.100 DIP14.TBL 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 notice. 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. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 5/5 PM-DIP14.EPS |
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