STV8224A STMicroelectronics, STV8224A Datasheet

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STV8224A

Manufacturer Part Number
STV8224A
Description
MULTISTANDARD VIDEO AND SOUND IF SYSTEM WITH AUDIO AND VIDEO SWITCHES
Manufacturer
STMicroelectronics
Datasheet

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DESCRIPTION
The STV8224Ais a picture and sound IF processor
for multistandard application with very few external
components and adjustments.
It provides the audio and video switches for one
SCART plug application.
AM sound demodulation is performed with the
STV8225 add-on.
PIN CONNECTIONS
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May 1995
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without no tice.
SWITCHING INPUT (STANDARD + INT/EXT)
VIDEO PLL DEMODULATION
SOUND PLL DEMODULATION
POSITIVE AND NEGATIVE MODULATION
AGC FOR BG AND L STANDARDS
AUDIO SWITCH
DC VOLUME CONTROL
VIDEO SWITCH
2nd IF DECOUPLING + MUTE
AUDIO HIGH PASS FILTER
EXTERNAL VIDEO INPUT
VIDEO SWITCH OUTPUT
INTERNAL VIDEO INPUT
MULTISTANDARD VIDEO AND SOUND IF SYSTEM
2nd IF SOUND INPUT
PIF PLL FILTER
CVBS OUTPUT
AFC OUTPUT
IF LC
IF LC
WITH AUDIO AND VIDEO SWITCHES
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
TUNER AGC STARTING POINT ADJUSTMENT
TUNER AGC OUTPUT
AGC CAPACITOR
AGC CAPACITOR (L STANDARD)
IF INPUT
IF INPUT
GROUND
V
EXTERNAL AUDIO INPUT
FM DEMODULATED AUDIO OUTPUT
AUDIO SWITCH OUTPUT
VOLUME CONTROL + MUTE
CC
ORDER CODE : STV8224A
(Plastic Package)
SHRINK24
STV8224A
PRELIMINARY DATA
1/12

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STV8224A Summary of contents

Page 1

... AUDIO SWITCH . DC VOLUME CONTROL VIDEO SWITCH DESCRIPTION The STV8224Ais a picture and sound IF processor for multistandard application with very few external components and adjustments. It provides the audio and video switches for one SCART plug application. AM sound demodulation is performed with the STV8225 add-on. ...

Page 2

... EXT CVBS 6dB & AFC WHITE NOISE VID & AMP SPOT INVERT Int/Ext LOGIC INTERFACE BG/L SIF LIMITER PLL & MUTE STV8224A EXT AUDIO AUDIO OUT Parameter Parameter Max. SWITCHED 11 CVBS 10 3 SFE SFE 5.5 6.5 CVBS OUT Value Unit 13 ...

Page 3

... RMS = 38.9MHz 33.4MHz 1kHz, Audio BW = 20kHz 50kHz, RMS M Test Conditions -3dB Video at Output +1dB Video at Output See Figure 21 Top Sync to White B/G and L B/G L -3dB Video Signal Note 1 - Weighted CCIR-567 Note 2 STV8224A Min. Typ. Max. Unit RMS 1 110 mV RMS -1.4 1 ...

Page 4

... STV8224A ELECTRICAL CHARACTERISTICS (continued 9V, IF input = 10mV amb CC Video modulation DSB 90 Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mV Volume attenuation = 0dB, unless otherwise specified) Symbol Parameter AGC CIRCUIT (L MODE) I Charging Current 22CL I Discharge Current 22DL I + Additional Charging Current 22CL ...

Page 5

... V = 1.5V 12 DC12 High impedance controling circuit Video : External - Audio : External Video : Internal - Audio : Internal Video : External - Audio : External Video : Internal - Audio : External Level linked Level linked Level linked STV8224A Min. Typ. Max. Unit 1.6 1.9 2.2 V 1.8 V 1.7 2 2 ...

Page 6

... STV8224A INPUT/OUTPUT PIN CONFIGURATION Figure 1 : PIF PLL Filter 1 Figure 3 : CVBS Output 3 Figure 5 : IFLC 6/12 Figure 2 : AFC Output 2 Figure 4 : Switching Input Standard + INT/EXT 4 Figure 6 : Audio High Pass Filter 6 7 ...

Page 7

... Figure 7 : 2CD IF Sound Input (Pin 8) 2CD IF Decoupling + Mute (Pin 9) 8 Figure 9 : Video Switch Output 11 Figure 11 : Volume Control + Mute 13 Figure Demodulated Audio Output Figure 8 : Internal Video Input 10 9 Figure 10 : External Video Input 12 Figure 12 : Audio Switch Output 14 Figure 14 : External Audio Input 16 STV8224A 7/12 ...

Page 8

... STV8224A INPUT/OUTPUT PIN CONFIGURATION (continued) Figure 15V Figure 17 : AGC Capacitor 21 Figure 19 : Tuner AGC Output 23 8/12 Figure Input 19 Figure 18 : AGC Capacitor 22 Figure 20 : Tuner AGC Starting Point Adjustment ...

Page 9

... Pin 24) R24 = 1k R24 = 3k R24 = (mV ) RMS IN White Spike Noise Clamp Top White White Noise Level Insertion Black Noise Level Insertion Top Synchronization Black Spike Noise Clamp t STV8224A 13 4.0 2.0 3.0 5 100 200 9/12 ...

Page 10

... STV8224A APPLICATION DIAGRAM (B/G/D/K) STV8224A 10/12 ...

Page 11

... APPLICATION DIAGRAM (B/G/D/K, L) STV8224A - STV8225 STV8224A 11/12 ...

Page 12

... STV8224A PACKAGE MECHANICAL DATA 24 PINS - PLASTIC SHRINK DIP Millimeters Dimensions Min 0.51 b 0.35 b1 0.2 b2 0. 19.558 2.54 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 ...

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