STV8224B ,MULTISTANDARD VIDEO AND SOUND IF SYSTEM WITH AUDIO AND VIDEO SWITCHESSTV8224BMULTISTANDARD VIDEO AND SOUND IF SYSTEMWITH AUDIO AND VIDEO SWITCHES.VIDEO PLL DEMODULATION ..
STV8225 ,AM SIF CIRCUITSTV8225AM SIF CIRCUIT.SOUND AM SYNCHRONOUS DEMODULATOR.AM/FM AUDIO SWITCH.AV/TV AUDIO SWITCH.MUTE I ..
STV8237 , Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
STV8237 , Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
STV8257DSX , Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
STV8257DSX , Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
T74LS374 , Octal D-type flip-flop with 3-state outputs
T7503 , T7503 Dual PCM Codec with Filters
T77V1D10-12 , Potter & Brumfield
T77V1D10-12 , Potter & Brumfield
T7933 ,ROW DRIVER LSI FOR A DOT MATRIX GRAPHIC LCDT7933 TOSHIBA CMOS DIGITAL INTEGRATED CIRCUIT SILICON MONOLITHIC T7933 ROW DRIVER LSI FOR A DOT M ..
T7NS1D4-48 , Miniature Power PCB Relay T7N / T7N-WG
STV8224B
MULTISTANDARD VIDEO AND SOUND IF SYSTEM WITH AUDIO AND VIDEO SWITCHES
STV8224BMULTISTANDARD VIDEO AND SOUND IF SYSTEM
WITH AUDIO AND VIDEO SWITCHES
January 1997
TUNER AGC STARTINGPOINT ADJUSTMENT
TUNER AGC OUTPUT
AGC CAPACITOR
AGC CAPACITOR(L STANDARD) INPUT INPUT
GROUND
EXTERNAL AUDIO INPUT DEMODULATEDAUDIO OUTPUT
AUDIO SWITCH OUTPUT
VOLUME CONTROL+ MUTE
PIF PLL FILTER
AFC OUTPUT
CVBS OUTPUT
SWITCHING INPUT (STANDARD+ INT/EXT)LCLC
AUDIO HIGH PASS FILTER
2ndIF SOUND INPUT
AUDIO AND 2ndIF DECOUPLING
INTERNAL VIDEO INPUT
VIDEO SWITCH OUTPUT
EXTERNAL VIDEO INPUT
PIN CONNECTIONS
SHRINK24
(Plastic Package)
ORDER CODE: STV8224B VIDEO PLL DEMODULATION. SOUND PLL DEMODULATION. POSITIVE AND NEGATIVE MODULATION. AGC FOR BG ANDL STANDARDS. AUDIO SWITCH. DC VOLUME CONTROL. VIDEO SWITCH
DESCRIPTIONTheSTV8224Bisa pictureand sound IFprocessor
for multistandardapplicationwith very fewexternal
componentsand adjustments. provides the audio and video switches for one
SCART plug application. sound demodulationis performed with the
STV8225 add-on.
1/12
TUNER
AGCOUTPUT
AFCOUTPUT
EXTCVBS
SWITCHED
CVBS
CVBS
OUT
SWITCHED
AUDIO
STV8224BInt/Ext
BG/L
AUDIO
OUT
EXT
AUDIO INPUT13 15 717125162
PIFPLL& AFC
VIDAMP
6dB
VCC
WHITE NOISE SPOTINVERT
LOGICINTERFACE
TUNER
AGC
AGC
VOLUME 8
SIF
PLL LIMITER
AUDIO
Vref
MUTE
SFE
SFE
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit Supply Voltage 13.5 V Tuner AGC Voltage VCC V
Tstg Storage Temperature -40, +150 oC
Toper Operating Temperature 0, +70 oC
THERMAL DATA
Symbol Parameter Value Unit
Rth(j-a) Junction-ambient Thermal Resistance Max. 75 o C/W
24B
STV8224B
2/12
ELECTRICAL CHARACTERISTICS(Tamb =25°C, VCC= 9V,IF input= 10mVRMS synclevelat B/G,Peak-white levelatL,
Videomodulation DSB,D= 90%at B/G,D= 95%atL, fPC =38.9MHz,fSC= 33.4MHz,
VideoBW= 5MHz, Sound carrier input: 5.5MHz,10mVRMS,fM =1kHz, AudioBW= 20kHz,Δf= ±50kHz,
Volume attenuation= 0dB,unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. UnitSUPPLY
VCC Supply Voltage 8 9 12.6 V
ICC Supply Current I17,VCC =9V 70 95 mA AMPLIFIER
V19-20 Input Sensitivity (RMS) -3dB Videoat Output 70 μVRMS
R19-20 Differential Input Resistance 2 kΩ
C19-20 Differential Input Capacitance 2 pF Gain Control Range 68 dB
Max Input Signal +1dB Videoat Output 180 mVRMS
SYNCHRONOUS VIDEO DEMODULATOR
DFPC Vision Carrier Capture -1.4 1.6 MHz
AFC AFC Slope See Figure21 0.2 μA/kHz
DEMODULATED VIDEO OUTPUT (Pin3)
VA3 Amplitude Top Syncto White 2 2.3 2.6 VPPvsL Amplitude Difference 10 %
VS3 Top Sync Level B/G andL 1.6 1.9 2.2 V
Zero Carrier Level B/G
1.8 Bandwidth -3dB Video Signal 7 9 MHz Differential Gain 6 8 % Differential Phase 3 6 Degree
Vr3c Residual Carrier Signal (RMS Value) 1 10 mV
Vr3h Residual 2nd Harmonic (RMS Value) 1 10 mV Internal Biasof Emitter Follower 3 5 mA
S/N Signalto Noise Ratio Note1- Weighted CCIR-567 56 61 dB
Intermodulation 1.07MHz Note2 52 dB
VWTH White Noise Threshold Voltage 4.85 V
VWIL White Noise Insertion Level 3.6 V
VBTH Black Noise Threshold Voltage 1.3 V
VBIL Black Noise Insertion Level 2.5 V
AGC CIRCUIT (BG MODE)
I22CBG Charging Current 550 950 1300 μA
I22DBG Discharge Current 12 20 28 μA
C/D Charging/Discharging Ratio 45
Notes:1.S=20log10 Voutblackwhite (mVRMS) atBW= 5MHz Video carrier relative level= 0dB, Chroma subcarrier level= -3.2dB,Sound carrier relativelevel= -20dB. AGC voltage(Pin22) adjustedtoget 1VPP signalon output (Pin3).
8224B
STV8224B3/12
ELECTRICAL CHARACTERISTICS (continued)
(Tamb =25°C,VCC= 9V,IF input= 10mVRMS sync levelat B/G,Peak-white levelatL,
VideomodulationDSB,D= 90%at B/G,D= 95%atL, fPC= 38.9MHz,fSC= 33.4MHz,
VideoBW= 5MHz, Sound carrier input: 5.5MHz,10mVRMS,fM= 1kHz,Audio BW= 20kHz,Δf= ±50kHz,
Volume attenuation= 0dB, unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. UnitAGC CIRCUIT(L MODE)
I22CL Charging Current Note3 2 3.3 4.5 mA
I22DL Discharge Current 0.3 μA
I22CL+ Additional Charging Current Lin caseof missing, VITS Pulses
andno Whitein Video Content μA
Threshold Voltage Levelfor
Additional Charging Current
Referedto Pin3 2.75 V
I22DL+ Additional Discharging Current 28 40 56 μA
Threshold Voltage Levelfor
Additional Discharging Current
Referedto Pin3 2.25 V
TUNER AGC
I23 Maximum Sinked Current 1.5 2 2.5 mA
S23 Current Slope R24 =5kΩ 100 170 230 μA/dB
I23+ Maximum Tuner Plus Sinked
Current
Note4 40 mA SOUND DEMODULATION
V8S Input Sensitivity 150 μVRMS Limiter Input Resistance 600 Ω Voltage (Pin8) 4.2 V
AMR Amplitude Modulation Rejection Note5 50 61 dB
SVR Supply Voltage Rejection Ratio Ripple signal: 100Hz, 0.5VPP 28 33 dB
V15 Detected Audio Output Signal 0.85 1.1 1.4 VRMS
THD Total Harmonic Distortion 0.2 1 %
R15 Internal Deemphasis Resistor 600 750 900 Ω
S/N Signalto Noise Ratio See Note6,
WeightedCCIR 468-4,
(quasi peak level) inputPin8 60 dB
Black Picture (sync only) Measurement betweenIF input
(Pins 19-20) and audiooutput (Pin15)
SAW: K2955
BPF: SFE5.5MB 52 dB
White Picture 46 50 dB
250kHz Square Wave 47 52 dB
VOLUME CONTROL Range Control Range See Figure22 72 77 dB
Notes:3. Triggeredon whitelevel Additional sinked currentfor large increasing stepsof input signal when: VoltagePin22> startingpoint definedPin24. Outputsignal (Pin3) saturated(V3< VBTHinBG mode,V3>V WTHinL mode). AMR=20log V15(mVRMS)
VAM (dB) whereVAM= output amplitudeinAMforfM= 1kHzandm= 30%S=20log V15(mVRMS) (mVRMS) (dB)
STV8224B
4/12
ELECTRICAL CHARACTERISTICS (continued)
(Tamb =25°C, VCC= 9V,IF input= 10mVRMS synclevelat B/G,Peak-white levelatL,
Video modulation DSB,D= 90%at B/G,D= 95%atL, fPC =38.9MHz,fSC= 33.4MHz,
Video BW= 5MHz, Soundcarrier input: 5.5MHz,10mVRMS,fM =1kHz, AudioBW= 20kHz, Δf= ±50kHz,
Volume attenuation= 0dB, unlessotherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. UnitAUDIO SWITCH
R16 Input Resistance 55 70 85 kΩ
CRtk Crosstalk 70 80 dB Output Noise Level (Pin14) Weighted CCIR 468-4, V13= 0.5V
(quasi peak level) μV
EXTHD THDon External Signal (Pin 14) VIN =2VRMS, Attenuation= 0dB 0.1 0.3 %
Audio Reference Voltage (Pin9) 4.5 V
VIDEO SWITCH
VDC12 DC Input Level No signal 1.6 1.9 2.2 V
VS12 Top Sync. Clamp Level 1.8 V
V11 DC Output Level No signal 1.7 2 2.3 V
VS11 Top Sync. Clamp Level 1.5 V
Crosstalk 55 dB
GEX Gain from Ext. Inputto Output 5.5 6 6.5 dB
Output Swing 4 5 V
I12 Input Current V12 =VDC12= 1.5V 1 5 μA
VBW Bandwidth VIN =1VPP 15 MHz
GIN Gain fromInt. Inputto Output -0.5 0 +0.5 dB
MUTE (Pin13)
VTH13 Threshold Voltage Pin13 0.2 0.3 0.4 V
CONTROL INPUT
Negative Modulation Video: External- Audio: External 7.2 V
Threshold3 Level linkedto VCC 6.4 6.8 7.2 V
Positive Modulation Video: External- Audio: External 4.9 6.4 V
Threshold2 Level linkedto VCC 4.1 4.5 4.9 V
Positive Modulation Video: Internal- Audio: External 2.6 4.1 V
Threshold1 Level linkedto VCC 1.8 2.2 2.6 V
Negative Modulation Video: Internal- Audio: Internal 1.8 V
.TB
STV8224B5/12
8224B
Figure3: CVBS Output
Figure4: SwitchingInput Standard+ INT/EXT
2kΩ 2kΩ
Figure5: IFLC
Figure6: Audio High Pass Filter
Figure1: PIFPLL Filter
24B
Figure2: AFCOutput
INPUT/OUTPUT PIN CONFIGURATION
STV8224B6/12
