Obsolete Product(s) - Obsolete Product(s) STV6432 Audio/Video Output Buffers for STB and DVD Devices FEATURES DESCRIPTION

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1 Audio/Video Output Buffers for STB and DVD Devices FEATURES VIDEO SECTION Y/C/CVBS Inputs Y/C Outputs for TV 4 CVBS Outputs (for TV, VCR, Aux and RF Modulator) 6 db Gain with Fine Adjustment Integrated 150Ω Buffers Sync Bottom Clamp on all CVBS/Y And Bias on C Inputs Crosstalk: 50 db (Typ.) Bandwidth: 15 MHz AUDIO SECTION 1 pair of Stereo Inputs 1 pair of Stereo Outputs (TV, VCR, AUX) Stereo-to-Mono Capability (RF Mod output) 6 db Gain Crosstalk: 80 db min. DESCRIPTION The is an audio/video output interface for US STB and DVD. It adapts in amplitude and impedance the audio and video signals coming from the digital decoder to provide them to the TV set, VCR, Auxiliary and RF modulator. The video gains are adjustable from 5 db to 8 db in steps of 1 db. SO28 ORDER CODE: September /15 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

2 TABLE OF CONTENTS Chapter 1 PIN CONNECTIONS Chapter 2 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings Thermal Data Supply Section Audio Section Video Section Chroma Section...8 Chapter 3 INPUT/OUTPUT GROUPS Chapter 4 APPLICATION DIAGRAMS Chapter 5 PACKAGE MECHANICAL DATA Chapter 6 REVISION HISTORY /15

3 1 PIN CONNECTIONS PIN CONNECTIONS Figure 1: Pin Connections on SO28 Package CVBSOUT_VCR CVBSOUT_TV V CCB2 COUT_TV V CCB3 YOUT_TV FINE_GAIN NC GND V CCV DECV CVBSIN_ENC CIN_ENC YIN_ENC Table 1: Pin List Description Pin No. Symbol Description CVBSOUT_VCR CVBS Output to VCR 2 CVBSOUT_TV CVBS Output to TV 3 V CCB2 +5 V Video Output Buffers Supply 4 COUT_TV Chroma Output to TV 5 V CCB3 +5 V Video Output Buffers Supply 6 YOUT_TV Y Output to TV 7 FINE_GAIN Y/C/CVBS Output Gain Fine Adjustment 8 NC 9 GND Ground 10 V CCV +5 V Video Supply 11 DECV Video Decoupling Capacitor 12 CVBSIN_ENC CVBS Input from Encoder 13 CIN_ENC Chroma Input from Encoder 14 YIN_ENC Y Input from Encoder 15 GND Ground 16 RIN_ENC Audio Right Input from Encoder 17 LIN_ENC Audio Left Input from Encoder 18 DECA Audio Decoupling Capacitor 19 GNDA Audio Ground 20 V CCA +9 V Audio Supply or Audio Supply Decoupling 21 ROUT Audio Right Output 22 LOUT Audio Left Output 23 V CC12 Audio Supply (+12V or +9V) 24 AOUT_RF Audio (L+R) Output to RF Modulator 25 VOUT_RF CVBS Video Output to RF Modulator 26 V CCB1 +5 V Video Output Buffers Supply 27 CVBSOUT_AUX CVBS Output to Auxiliary 28 GNDB Video Buffer Ground GNDB CVBSOUT_AUX V CCB1 VOUT_RF AOUT_RF V CC12 LOUT ROUT V CCA GNDA DECA LIN_ENC RIN_ENC GND 3/15

4 PIN CONNECTIONS Figure 2: Block Diagram STV 6432 YIN_ENC LPF 14 Clamp 6 db YOUT_TV 6 DIGITAL DECODER CIN_ENC LPF 13 CVBSIN_ENC LPF 12 FINE_GAIN LIN_ENC 17 DAC 7 Clamp Clamp 6 db 6 db 6dB COUT_TV CVBSOUT_TV CVBSOUT_VCR 25 VOUT_RF 27 CVBSOUT_AUX LOUT AOUT_RF 16 6dB ROUT 21 RIN_ENC TV VCR RF Mod AUX 4/15

5 2 ELECTRICAL CHARACTERISTICS ELECTRICAL CHARACTERISTICS 2.1 Absolute Maximum Ratings Table 2: Absolute Maximum Ratings Symbol Parameter Value Unit V CC12 Audio Section 13 V V CCA Audio Section 10 V V CCV, V CCB V I Video Sections Voltage at Pin 1 to GND - Audio pins - Video pins 2.2 Thermal Data 2.3 Supply Section T AMB = 25 C, V CCV = 5 V, V CCB = 5 V, V CCA = 9 V 6 V 0, V CCA or V CC12 0, V CCV or V CCB V V ESD Maximum ESD voltage allowed. 100 pf capacitor discharged through ±4 1.5 kω serial resistor (Human Body Model) kv T oper Operating Ambient Temperature 0, +70 C T stg Storage Temperature 0, +150 C Table 3: Thermal Data Symbol Parameter Value Unit R th(j-a) Junction-ambient Thermal Resistance 71 (Max.) C/W R GA = 600 Ω, R LOUTA = 10 kω, R GV = 75 Ω, R LOUTV = 150 Ω, unless otherwise specified. Table 4: Supply Data Symbol Parameter Test Conditions Min. Typ. Max. Unit V CC12 Audio Operating Supply Voltage Decoupling capacitor on V CCA V V CC12 Audio Operating Supply Voltage V CC12 connected to V CCA V V CCA Audio Operating Supply Voltage V V CCV Video Operating Supply Voltage V V CCB Video Buffers Supply Voltage V I CC12 Audio Output Supply Current V CC12 = 12 V, No load 5 ma I CCA Audio Output Supply Current V CCA = 9 V, No load 4 ma I CCV Video Supply Current (V CCV ) V CCV = 5 V, No load 12 ma I CCB Video Buffers Supply Current (V CCB ) V CCB = 5 V, No load 20 ma 5/15

6 ELECTRICAL CHARACTERISTICS 2.4 Audio Section T AMB = 25 C, V CCV = 5 V, V CCB = 5 V, V CCA = 9 V R GA = 600 Ω, R LOUTA = 10 kω, R GV = 75 Ω, R LOUTV = 150 Ω, unless otherwise specified. Table 5: Audio Data Symbol Parameter Test Conditions Min. Typ. Max. Unit SVR100 SVR1K Supply Voltage Rejection Supply Voltage Rejection V RIPPLE = 500 mv RMS at 120 Hz, DECA filter cap = 47 µf DECA filter cap = 220 µf 60 V RIPPLE = 500 mv RMS at 1 khz DECA filter cap = 220 µf db db V INDC Input DC Level V CCA = 9 V V CCA /2 V V INAC Input Signal Amplitude 2 V RMS R IN Input Resistance kω R INmatch Input Resistance Matching ±2 ±10 % F RANGE Bandwidth -3 db, V IN = 0.5 V RMS R LOAD = 10 kω 50 khz Flatness Spread of Gain in Audio Band V IN =0.5V RMS (Peak-to-Peak) 20 Hz to 20 khz ±0.5 db CS V IN =0.5V RMS at 1 khz on one Channel Separation input, between L & R TV outputs R LOAD = 10 kω on both outputs db Ci Channel Isolation from video inputs V IN = 1 V PP at 15 khz on one video input 85 db V OUT Output DC Level V CCA = 9 V V CCA /2 V R OUT Output Resistance Ω PHD Phase Difference V IN = 1 V RMS at 1 khz on each input channel 3 Degree ASN Audio Signal/Noise ratio V IN = 1 V RMS A weighted at 1 khz, Gain = 6 db 80 db eni 1 Equivalent RMS Input Voltage Noise BW = 20 Hz at 20 khz unweighted, Gain = 6 db 5 µv GAL 6 db Gain V IN = 0.5 V RMS, R LOAD = 10 kω db G MA Gain matching between Left/Right V IN = 0.5 V RMS at 1 khz outputs Gain = 6 db -1 1 db THD Total Harmonic Distortion V IN = 0.5 V RMS at 1 khz ENC Input with Gain = 6 db Low Pass Filter at 80 khz % V CL Output Clipping Level THD = 0.2% at 1 khz, V RMS R L Output Load Resistance V IN = 1 V RMS, THD = 0.3%, kω 1. eni is the total unweighted output noise in a 20 Hz to 20 khz bandwidth divided by the gain. 6/15

7 ELECTRICAL CHARACTERISTICS 2.5 Video Section T AMB = 25 C, V CCV = 5 V, V CCB = 5 V, V CCA = 9 V R GA = 600 Ω, R LOUTA = 10 kω, R GV = 75 Ω, R LOUTV = 150 Ω, unless otherwise specified. Table 6: Video Data Symbol Parameter Test Conditions Min. Typ. Max. Unit V DCIN DC Input Level Bottom Sync Pulse 2 V I CLAMP Clamping Current V IN = V DCIN -400 mv 1 2 ma I LEAK Input Leakage Current V IN = V DCIN +1 V 1 10 µa C IN Input Capacitance 2 pf V IN Maximum Input Signal V CCV = 5 V, Gain = 6 db 1.5 V PP DYN Dynamic Output Signal V CCV = 5 V, Gain = 6 db 3 V PP BW Bandwidth on Y and CVBS Outputs V IN = 1 V PP, at -3 db, Gain = 6 db 8 15 MHz Flatness Spread of Gain in Video Band (15 khz to 5 MHz) of Y and CVBS V IN = 1 V PP ±0.5 db Video Crosstalk Output V IN = 1 V PP at 3.58 MHz on either VCT O Crosstalk Isolation between Output Channels YIN_ENC or CIN_ENC inputs R LOAD = 150 Ω; Gain = 6dB 50 db Video Crosstalk Output V IN = 1 V PP at 3.58 MHz on VCT O1 Crosstalk Isolation between Output CVBSIN_ENC input; Only one Channels when CVBSIN_ENC is CVBS output loaded at 150 Ω; 50 db driven Gain = 6 db Video Crosstalk Output V IN = 1 V PP at 3.58 MHz on VCT O4 Crosstalk Isolation between Output CVBSIN_ENC input; All 4 CVBS Channels when CVBSIN_ENC is outputs loaded at 150 Ω; 44 db driven Gain = 6 db R OUT Output Resistance 5 10 Ω V G V5 5 db Gain on Y and CVBS Channels IN = 1 V PP Pin 7 to GND or Logic db G V6 6 db Gain on Y and CVBS Channels V IN = 1 V PP. Pin 7 is open db G V7 7 db Gain on Y and CVBS Channels V IN = 1 V PP ; Pin 7 connected to V CCV (5 V) via 22 kω or to 3.3 V db G V8 8 db Gain on Y and CVBS Channels V IN = 1 V PP Pin 7 to V CCV (5 V) db VH5 5 db Gain: Max. V IN Voltage on Pin 7 Pin 7 to Ground or Logic 0 (I IN < 160 µa) 1.1 V VL6 6dB Gain: Min. V IN Voltage on Pin 7 Pin 7 is open. 1.3 V VH6 6 db Gain: Max. V IN Voltage on Pin 7 Pin 7 is open. 1.7 V VL7 7dB Gain: Min. V IN Voltage on Pin 7 Pin 7 connected to V CCV (5 V) via 22 kω or to 3.3 V (I IN < 140 µa) 1.9 V VH7 7 db Gain: Max. V IN Voltage on Pin 7 Pin 7 connected to V CCV (5 V) via 22 kω or to 3.3 V (I IN < 140 µa) 4.0 V VL8 8dB Gain: Min. V IN Voltage on Pin 7 Pin 7 connected to V CCV (5 V) (I IN < 350 µa) 4.2 V DC OUT DC Output Voltage Bottom sync pulse 0.6 V DPHI Differential Phase V IN = 1 V PP at 3.58 MHz 1 5 Degree DG Differential Gain V IN = 1 V PP at 3.58 MHz 1 5 % LNL Luminance Non-Linearity % VSN Video S/N Ratio 2 65 db 1. When Pin 7 is left open, its voltage is determined by an internal voltage divider consisting of 42 kω to V CC (5 V) and 18 kω to Ground 2. S/N = 20 log (V OUT Black to White = 0.7 V PP / V Noise (mv RMS ) weighted CCIR 567). 7/15

8 ELECTRICAL CHARACTERISTICS 2.6 Chroma Section T AMB = 25 C, V CCV = 5 V, V CCB = 5 V, V CCA = 9 V R GA = 600 Ω, R LOUTA = 10 kω, R GV = 75 Ω, R LOUTV = 150 Ω, unless otherwise specified. Table 7: Supply Data Symbol Parameter Test Conditions Min. Typ. Max. Unit V DCIN DC Input Level 3 V R IN Input Resistance kω C IN Input Capacitance 2 pf V IN Max Input Signal Gain = 6 db 1.5 V PP DYN Dynamic Output Signal Gain = 6 db 3 V PP DC OUT DC Output Voltage 2.2 V CBW Chroma Bandwidth V IN = 1 V PP at -3 db Gain = 6 db 8 MHz CCT O Chroma Crosstalk Output Crosstalk Isolation between Output Channels V IN = 1 V PP at 3.58 MHz on input YIN_ENC R LOAD = 150 Ω, Gain = 6 db V IN = 1 V PP at 3.58 MHz on CVBSIN_ENC input; Only one CVBS output loaded at 150 Ω; Gain = 6 db V IN = 1 V PP at 3.58 MHz on CVBSIN_ENC input; All 4 CVBS outputs loaded at 150 Ω; Gain = 6 db 50 db CCT O1 Chroma Crosstalk Output Crosstalk Isolation between Output Channels when CVBSIN_ENC is driven 50 db Chroma Crosstalk Output CCT O4 Crosstalk Isolation between Output Channels when CVBSIN_ENC is 44 db driven R OUT Output Resistance 5 10 Ω V G C5 5 db Gain on Chroma Channels IN = 1 V PP Pin 7 to GND or Logic db G C6 6 db Gain on Chroma Channels V IN = 1 V PP, Pin 7 is open db G C7 7 db Gain on Chroma Channels V IN = 1 V PP ; Pin 7 connected to V CCV (5 V) via 22 kω or to 3.3 V db G C8 8 db Gain on Chroma Channels V IN = 1 V PP Pin 7 to V CCV (5 V) db CToYdel Chroma to Luma Delay, Source Y/C V IN = 1 V PP at 3.58 MHz 20 ns 1. When Pin 7 is left open, its voltage is determined by an internal voltage divider consisting of 42 kω to V CC (5 V) and 18 kω to Ground 8/15

9 3 INPUT/OUTPUT GROUPS INPUT/OUTPUT GROUPS Figure 3: Bottom Clamped Video Inputs (Pins 12 & 14) Figure 6: Audio Inputs (Pins 16 and 17) V CCV 5V V CCV 5V V CCA 9V 2V + V D 1kΩ V CCA /2 Figure 4: Average Clamped Video Inputs (Pin 13) Figure 7: Audio Outputs (Pins 21, 22 and 24) V CCV 5V I B V CCV 5V 50 kω 3V Figure 5: Video Outputs (Pins 1, 2, 4, 6, 25 and 27) Figure 8: Fine Gain Control Input (Pin 7) V CCV 5V V CCB1,2,3 5V V CCV 5V V CCV 5V 42 kω I B 60 Ω V CC12 12 V 18 kω 9/15

10 INPUT/OUTPUT GROUPS Figure 9: Video Decoupling (Pin 11) Figure 10: Audio Decoupling (Pin 18) V CCA 5V V CCA 5V V CCA 9V V CCA 9V 10 kω 25 kω 40 kω 25 kω Figure 11: Power Supply Connections V CCB1 V CCB2 V CCB3 V CCV V CCA V CC V 10 5V V GNDB GND GNDA GND These symbols represent some large diode and Zener-like components used for the ESD protection of the device. They are not supposed to be paths for any current in normal operation mode. 12 V 10/15

11 4 APPLICATION DIAGRAMS APPLICATION DIAGRAMS Figure 12: Application Diagram for 5V/12V Power Supplies VCR CVBS TV CVBS TV C TV Y Enc. CVBSOUT Enc. COUT Enc. YOUT Fine Gain 5V R LPF LPF LPF 8dB 7dB 6dB 5dB C5 10p L1 10µ C10 C9 C6 C7 R1 R2 47p 47p 5V R6 75 R3 75 R5 75 R4 75 C1, C3, C8, C19, C20 and C22 capacitors must be placed very close to the IC pins. LPF is an example of reconstruction filter that you can place after a video DAC. In this schematic, Fc=7.3MHz (Fc=1/(2pi*sqrt(LC))), C5, is used to add a little peaking at Fc. R1 and R2 must be adapted to MPEG DAC expected output load. C4 Expected signals on Video Fine Gain pin: 5V for 8dB gain, 22K pull up or 3.3V for 7dB gain, NC for 6dB gain, and GND for 5dB gain. C16 47n C1 C8 C21 C CVBSOUT_VCR CVBSOUT_TV Vccb2 COUT_TV Vccb3 YOUT_TV Fine Gain NC GND Vccv DECV CVBSIN_ENC CIN_ENC YIN_ENC 12V C2 GNDB CVBSOUT_AUX Vccb1 VOUT_RF AOUT_RF Vcc12 LOUT ROUT Vcca GNDA DECA LIN_ENC RIN_ENC GND All grounds must be linked under the IC C17 R7 75 C3 R10 75 C C12 1µF R8 R9 C18 100µF C15 1µF C14 C11 C13 C19 AUX CVBS RF Modulator Audio L Audio R C20 DAC LOUT DAC ROUT 11/15

12 APPLICATION DIAGRAMS Figure 13: Application Diagram for 5V/9V Power Supplies VCR CVBS TV CVBS TV C TV Y 5V Fine Gain Enc. CVBSOUT Enc. COUT Enc. YOUT R 7dB R5 75 C20 AUX CVBS LPF LPF LPF R1 C6 47p 8dB 6dB 5dB C5 10p L1 10µ C10 C9 R6 75 R3 75 C16 47n LPF is an example of reconstruction filter that you can place after a video DAC. In this schematic, Fc=7.3MHz (Fc=1/(2pi*sqrt(LC))), C5, is used to add a little peaking at Fc. R1 and R2 must be adapted to MPEG DAC expected output load. R2 R4 75 C1, C3, C8, C19, C20 and C22 capacitors must be placed very close to the IC pins. C7 47p 5V 9V C4 C2 C21 C1 C8 1 CVBSOUT_VCR GNDB 2 CVBSOUT_TV CVBSOUT_AUX 3 Vccb2 Vccb1 4 COUT_TV VOUT_RF 5 Vccb3 AOUT_RF 6 YOUT_TV Vcc12 7 Fine Gain LOUT 8 NC ROUT 9 GND Vcca 10 Vccv GNDA 11 DECV DECA 12 CVBSIN_ENC LIN_ENC 13 CIN_ENC RIN_ENC 14 YIN_ENC GND 15 All grounds must be linked under the IC Expected signals on Video Fine Gain pin: 5V for 8dB gain, 22K pull up or 3.3V for 7dB gain, NC for 6dB gain, and GND for 5dB gain. R7 75 C3 R10 75 C22 R8 220 R9 220 C17 C18 100µF C12 1µF C15 1µF C14 C11 C13 C19 RF Modulator Audio L Audio R DAC LOUT DAC ROUT 12/15

13 PACKAGE MECHANICAL DATA 5 PACKAGE MECHANICAL DATA Figure 14: SO28 28-pin Plastic Small Outline Package (300-mil width) Dim. Table 8: SO28 Physical Characteristics mm Inches Min. Typ. Max. Min. Typ. Max. A A B C D E e H h K 0 8 L G /15

14 REVISION HISTORY 6 REVISION HISTORY Table 9: Summary of Modifications Revision Main Changes Date 1.0 First Issue March Addition of Section 4: APPLICATION DIAGRAMS on page 11 and Section 6: REVISION HISTORY on page 14. Reformat of Page Layout. Addition of Video and Audio Crosstalk Values (VCT O1 and CCT O1 ). Modification of Application Diagrams. 26 April Sep /15

15 REVISION HISTORY Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics 2003STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. 15/15