BUS CONTROLLED PAL/SECAM/NTSC TV PROCESSOR BYO RYO RYI BYI LFB/SC HOUT VOUT VAMP SLPF S XTL BCL ICAT CHR/SVHS V CC1

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1 BUS CONTROLLED PAL/SECAM/NTSC TV PROCESSOR. I 2 C BUS CONTROL OF ALL FUNCTIONS INTEGRATED FILTERS (TRAP, BANDPASS, CLOCHE) INTEGRATED LUMINANCE DELAY LINE PAL/SECAM/NTSCCHROMA DEMODULATORS AUTOMATIC CUT-OFF CURRENT LOOP TWO RGB INPUTS SVHS SWITCH. TWO PLLs HORIZONTAL DEFLECTION VERTICAL COUNT DOWN VERY FEW EXTERNAL COMPONENTS DESCRIPTION The STV28B is a fully bus controlled IC for TV luma, chroma and deflection processing. Used with STV8224 (PIF/SIF/switches), TDA77 or TDA874(frame booster), STV280(delay line), it allows to design a PAL/SECAM/NTSC (BGDKILMN) set with very few external components and no adjustment. SHRINK42 (Plastic Package) ORDER CODE : STV28B PIN CONNECTIONS CHROMA/SCANNING GROUND 42 CHROMA/SCANNING/BUS SUP P LY 3.58MHz XTAL CXTL2 2 4 BYO B-Y OUTPUT 4.43MHz XTAL CXTL 3 40 RYO R-Y OUTPUT CHROMA LOOP FILTER CLPF 4 39 RYI R-Y INPUT ACC CONTROL CAPACITOR ACC 5 38 BYI B-Y INPUT DATAWIRE I 2 C BUS SDA 6 37 LFB/SC LINE FLYBACK INPUT/SANDCASTLE OUTPUT CLOCK WIRE I 2 C BUS SCL 7 36 HOUT HORIZONTAL OUTPUT FILTER TUNING FTUN 8 35 VOUT VERTICAL OUTPUT CLOCHE FILTER TUNING FTUN VAMP AMPLITUDE CONTROL VOLTAGE VOLUME AND MUTE CONTROL VOLTAGE VOL 0 33 SLPF SCANNING LOOP FILTER IF STANDARD AND SWITCH SELECTION SWI 32 S XTL 503kHz CERAMIC OSD BLUE INPUT BOSD 2 3 BCL BEAM CURRENT LIMITER OSD GREEN INPUT GOSD 3 30 ICAT CATHODE CURRENT MEASUREMENT OS D RED INPUT ROS D 4 29 RO RED OUTPUT OSD RGB INSERTION FBOSD 5 28 GO GREEN OUTPUT EXTERNAL BLUE INPUT BEXT 6 27 BO BLUE OUTPUT EXTERNAL GREEN INPUT GEXT 7 26 CR RED CUT-OFF CAPACITOR EXTERNAL RED INPUT REXT 8 25 CB BLUE CUT-OFF CAPACITOR EXTERNAL RGB INSERTION FBEXT 9 24 CG GREEN CUT-OFF CAPACITOR CVBS OR LUMINANCE INPUT BUS/VIDEO GROUND Y/CVBS GND CHR/SVHS V CC CHROMINANCE INPUT/SVHS SELECTION VIDEO S UPPLY 28B-0.EPS June 996 /25 This datasheet has been downloaded from at this page

2 BLOCK DIAGRAM FILTER CLOCHE TUNING TUNING 8 9 V CC R-Y B-Y EXTERNAL OS D FB R G B FB R G B STV28B 25 CB 24 CG 26 CR 30 ICAT Y/CVBS CHR FILTER TUNING TRAP BANDPASS CLOCHE SVHS SWITCH Y DELAY LINE SHARP NESS MATRIX S ATURATION BRIGHTNE SS CONTRAS T Contrast RGB SWITCHES BLANKING AUTO CUT-OFF BLACK & WHITE CONTROL R G B 3 BCL CHR ACC 5 ACC STANDARD IDENTIFICATION S YNC S EPARATOR VIDEO IDENTIFICATION FRAME S CANNING VOUT VAMP SHARP HUE BRIG SAT CONT STD DRIVE CUT-OFF CXTAL2 CXTAL 2 3 PLL SECAM DEMODULATORS S ECAM KILLER PAL/ NTSC KILLER DELAY LINE INTERFACE PAL/NTSC DEMODULATORS BUS DECODER LINE S CANNING 36 HOUT CLPF R-Y B-Y GND SDA SCL S WI VOL S XTAL SLPF LFB/SC 28B-02.EPS 2/25

3 FUNCTIONAL DESCRIPTION - DEFLECTION CIRCUIT Note : [X,Y] : line number referred to the internal line counter numbering - Fully integrated synch. separator, with a low pass filter, a black level alignment of the Y/CVBS input, a slicing level at 2/3,/3 of the sync. pulse amplitude. - Frame sync. pulse locked on 2 f H frequency to perfect interlace kHz VCO with an external ceramic resonator. - Two phase locked loops the first PLL locks the VCO on the video signal frequency, the second PLL compensates the line transistor storage time. - Three time constants for the first PLL. the long time constant is used for normal operation the short time constant is automatically used during the frame retrace and in search mode of VCR when the frame pulse is outside [258,264] and [309,34]. very long time constant when no video recognition Time constants in normal operation (automatic selection of time constants) : 50Hz input signal : - short time constant : [306, 2] - long time constant : the rest of the field 60Hz input signal : - short time constant : [0, 6] - long time constant : the rest of the field inhibition of the first PLL : the first locked loop is opened from line 309 to line 4.5 (or 34) in 50Hz mode. It is opened from line 258 to line 5.5 (or 264) in 60Hz mode. the time constants values are chosen by means of external components. possibility to force the short time constant through the bus. possibility to force the very long time constant through the bus. - Video identification : coincidence detector between the line synchro top and a line frequency window from the first PLL. The video identification status is available in the output register of the I 2 C bus decoder. - Generation of burst gate pulses and line frequency signals from the first PLL to drive the chroma and video circuits. The burst gate pulse is also sent to the sandcastle generator. - Frame synchro window : [248, 352] catching - Field frequency selection windows : [248, 288] 60 Hz mode selec tion if two consecutive frame pulses occur inside this window,otherwise 50Hz mode selection. [288, 352] 50Hz mode selection window - frame blanking pulse : from line 0 to 2 in 50Hz mode from line 0 to 6 in 60Hz mode - Vertical output pulse is 0.5 lines long. - Horizontal output pulse : 28µs line pulse on an open collector output; - Start up circuit : the horizontal output is at a high level when V CC increases from 0 to 6.8V. On shutting down, horizontal pulses are disabled when V CC is below 6.2V. - Soft-start circuit : the duty cycle of the horizontal output is 78 % (Thigh/(Thigh + TLow)) when V CC is lower than (0.75 x VCC2), during the rising time. During the falling time, a 78% duty cycle HOUT pulse is provided when V CC is lower than (0.60 x ). - Possibility to disable the horizontal output pulse through the bus (force a high level on HOUT). - Horizontal position adjustment controlled by bus. - Bus controlled output voltage to adjust the vertical amplitude; this voltage permits to adjust the slope of the vertical sawtooth generated by the external frame booster. - Bus controlled vertical position ; the high level of the vertical pulse permits to adjust the vertical position. - Bus controlled 4/3-6/9 selection : the low level of the vertical pulse is 0.V when 6/9 is selected, 2V when 4/3 is selected. - Combined flyback input and sandcastle output (Pin 37). Two thresholds on LFB/SCO Pin : The lowest threshold (0.7V) permits to extract the line blanking pulse; the highest threshold (2V) permits to extract the line pulse for PLL2. The sandcastle signal at Pin 37 is used to control the external baseband chroma delay line. 3/25

4 FUNCTIONAL DESCRIPTION (continued) 2 - FILTERS - Integrated trap filter : Q =.7 at sharp. min Q = f o f 3dB Q = 3.0 at sharp. max f 3dB f o Center frequency : MHz, 3.58MHz for PAL, NTSC MHz, for SECAM (f -3dB = 3MHz ; -20dB rejection between 4.MHz and 4.4MHz) - Integrated chroma bandpass : Q = 3.5 Center frequency : 4.43MHz, 3.58MHz - Integrated cloche filter for SECAM : Q=6 Center frequency : 4.286MHz - Integrated delay line : Bandwidth = 8MHz - Integrated low pass filter for deflection part. - All filters are tuned with a reference phase locked loop. The PLL consists of a lowpass filter, a phase comparator, a loop filter (an external capacitor). The reference signal is the continuous carrier wave from the VCO (4.43MHz or 3.58MHz). The PLL adjusts the center frequency of the lowpass so that it is equal to the reference signal. The tuning voltage of thepll is used to adjust all other filters. The cloche filter is fine tuned with a second PLL operating during frame retrace. 3 - VIDEO CIRCUIT - 2 RGB inputs : RGB (OSD) input has priority against the RGBext. Maximum contrast on RGB (OSD). -2dB range contrast control on RGBext. Possibility to disable the RGBext insertion through the bus. - Oversize blanking capability on FB(OSD)(Pin5) input. The RGB ouputs will be blanked when the voltage on Pin 5 will exceed the second threshold at.9v (blanking threshold) : the whole field is blanked but not the inserted cut-off pulses. The OSD insertion threshold is 0.7V. - Automatic cut-off current loop : 2V cut-off range. Sequential cut-off current measurement during the three lines after the frame blanking signal. Leakage current measurement during the frame blanking, memorization on an internal capacitor. - Possibility to force through the bus the inserted cut-off pulses on lines 23/24/25(CCIR) in 50Hz and 60Hz mode. - Warm up detector. - Beam current limiter DC voltage input. The beam current limiter control voltage will act on contrast first, then the brightness will be decreased when contrast attenuationreaches -5dB. - Bus control of the red, green and blue channel gain (White point adjustment) - Bus control of the red and green DC levels (black point adjustment) - PAL and SECAM matrix, specific NTSC matrix when demodulation angles are (0 o,04 o ). - Switch-off of the trap filter in SVHS mode. - Bus controlled contrast on luminance (20dB range) - Bus controlled saturation (50dB range) - Bus controlled brightness : 40% range at maximum contrast. - Bus controlled sharpness (peaking) ; sharpness active in PAL/NTSC standard only. - Noise coring function on sharpness. 4/25

5 FUNCTIONAL DESCRIPTION (continued) 4 - CHROMA CIRCUIT 4. - PAL/SECAM/NTSC Decoders - SVHS inputs ; bus controlled SVHS mode. - 30dB range ACC - Use of an external base band delay line (STV280 recommended) - Automatic standard identification, with possibility to force the standard through the bus PAL/NTSC Decoders - ACC done by peak detector on synchronous demodulation of the burst - Fully integrated killer functions. - VCO using two standard crystals : 4.43MHz and 3.58MHz. One crystal is internally selected depending on the standard selection. XTAL SPECIFICATION : Frequency : MHz(PAL/SECAM) MHz(NTSC M) MHz (PAL M) MHz(PAL N) Vibration mode : Fondamental, series resonance (no serial capacitor) Motional capacity : 3fF ±3fF Resonance resistance : < 70Ω Shunt capacitance : < 7pF Spurious response : No resonance at 3*f o ±3kHz -0 o and ±90 o demodulation angles for PAL -(0 o,90 o )or(0 o,04 o ) = demodulation angles for NTSC. The selection of 90 o or 04 o is made through the bus. - Bus control Hue adjustment in NTSC mode SECAM Decoder - ACC - Fully integrated killer - Two integrated discriminators with two PLL - Integrated deemphasis Standard Identification - Sequential identification. - 3 identification sequences : XTAL (4.43MHz) mode to identify either PAL or NTSC, XTAL2 (3.58MHz) mode to identify either PAL or NTSC, SECAM mode (XTAL selection). - PAL/NTSC priority - the SECAM mode is locked after two identified SECAM sequences - the SECAM mode can be selected in 50Hz only - Blanking of the (R-Y) and B-Y) outputs during color search mode. 5 - OTHER FUNCTIONS : IF CONTROLS 5. - Volume Control and Mute The volume control voltage range on Pin 0 is from 0.5V to 5V. A low voltage on Pin 0 (below 0.2V) will mute the FM demodulator of the IF circuit STV8224. It will put the volume at the minimum level and thus there will be no sound either in TV mode or SCART mode. The volume control voltage and the mute level are controlled by the bus IF Standard and TV/SCART Mode Selection The selection of IF standard (positive or negative vision modulation) and thetv/scart mode is controlled bythe bus. The selection is converted in four voltages on Pin 2. The lowest voltage selects the TV mode and the NEGATIVE vision modulation. The highest voltage (open collector output with internal pull-up resistor to V CC ) selects the SCART mode and the NEGATIVE vision modulation. The two other intermediate voltages select either TV mode and POSITIVE vision modulation or SCART mode and POSITIVE vision modulation. 5/25

6 I 2 C BUS SPECIFICATION General Comments Slave Address : 8A (HEX) (0000X) WRITE MODE DATA FORMAT Slave Address Register Address Data (8A) The not used bits in data byte must be put to 0. READ MODE DATA FORMAT XXS SSSS (from 00 to HEX) XXSS SSSS (6 significant bits Max.) MSB on the left, LSB on the Right. Slave Address (8B) Data SSSS SSSS (8 significant bits) MSB X X X X X X X X X : not significant bit - S : significant bit LSB Input Signals (Write Mode) VIDEO Address Dec (HEX) Description Data (Bits) Comments 0 (00) Contrast 5 XXX = -20dB XXX = 0dB 0 (00) External Fast Blanking Enable XXSX XXXX 0 = RGBext insertion enable = RGBext insertion disable (0) Saturation 6 XX = -44dB XX = +6dB 2 (02) Brightness 5 XXX = -20% XXX = +20% 2 (02) RGB Outputs Blanking XXSX XXXX 0 = Normal mode = Blanking active 3 (03) Red Drive Adjust (white point red adjust) 6 XX = -6dB XX = 0dB 4 (04) Red Cut-off Adjust 6 XX = +50mV XX = -50mV 5 (05) Green Drive Adjust (white point green adjust) 6 XX = -6dB XX = 0dB 6 (06) Green Cut-off Adjust 6 XX = +50mV XX = -50mV 7 (07) Blue Drive Adjust (white point blue adjust) 6 XX = -6dB XX = 0dB 8 (08) Sharpness 3 XXXX X000 = Peaking Min. XXXX X = Peaking Max. 6/25

7 I 2 C BUS SPECIFICATION (continued) Input Signals (Write Mode) (continued) CHROMA Address Description Dec (HEX) Data (Bits) Comments 9 (09) Hue 6 XX = -45 o XX = +45 o 0 (0A) Standard Selection 4 XXXX SSSS 0000 = PAL/XTAL (4.43MHz) 000 = PAL/XTAL2 (3.58MHz) 000 = NTSC/XTAL/90 o 00 = NTSC/XTAL2/90 o 000 = SECAM/XTAL 00 = NTSC/XTAL/04 o 0 = NTSC/XTAL2/04 o 0X = Auto/90 o X = Auto/04 o 00 = Not allowed 000 = Not allowed 00 = Not allowed 00 = Not allowed 0 = Not allowed 0 (0A) SVHS Selection XXXS XXXX 0 = No SVHS (CVBS mode) = SVHS mode DEFLECTION Address Dec (HEX) Description Data (Bits) Comments (0B) Horizontal Shift 6 XX = -2.5µs XX = +2.5µs 2 (0C) Vertical Amplitude 6 XX =.2V XX = 6.2V 3 (0D) Vertical Position 3 XXXX X000 = 3.8V XXXX X = 6.3V 3 (0D) 50/60Hz Selection 2 XXXS SXXX 00 = Auto 0 = 60Hz 0 = 50Hz = Auto 3 (0D) Horizontal Output (HOUT) Safety XXSX XXXX 0 = Normal mode = HOUT disabled (high level) 4 (0E) PLL Time Constant 2 XXXX XXSS 00 = Normal mode (Auto) 0 = Short time constant 0 = Very long time constant = PLL inhibition (open loop) 4 (0E) Interlace XXXX XSXX 0 = Interlace = DE-Interlace 4 (0E) 4/3 6/9 Selection XXXX SXXX 0 = 4/3 (V OUT-Low = 2V) = 6/9 (V OUT-Low = 0.V) 7/25

8 I 2 C BUS SPECIFICATION (continued) Input Signals (Write Mode) (continued) OTHERS Address Description Dec (HEX) Data (Bits) Comments 5 (0F) Volume 6 XX = 0.5V XX = 5V 6 (0) Mute XXXX XXXS 0 = Mute not active = Mute active 6 (0) IF Standard / AV Switch 2 XXXX XSSX 00 = INT/FM (negative) 0 = INT/AM (positive) 0 = EXT/AM (positive) = EXT/FM (negative) 6 (0) Not Used XXXX SXXX S = 0 default value 6 (0) Cut-off Pulse Position XXXS XXXX 0 = lines 23/24/25 in50hz, lines 8/9/20 in 60Hz = lines 23/24/25 both in 50Hz and 60Hz 7 () Only for Test 6 XXSS SSSS = Test mode not active Output Signals (Read Mode) READ REGISTER Description Data (Bits) Comments Field Frequency XXXX XXXS = 50Hz 0 = 60Hz Video Identification XXXX XXSX = No Identification 0 = Video Identification SVHS Status XXXX XSXX = No SVHS 0 = SVHS Standard Status 3 XXSS SXXX = PAL/XTAL (4.43MHz) 0 = NTSC/XTAL 0 = SECAM/XTAL 0 = PAL/XTAL2 (3.58MHz) 00 = NTSC/XTAL2 X00 = Color off Circuit Identification 2 SSXX XXXX = STV28B/26/22 0 = STV26A 0 = STV22A 00 = STV226 8/25

9 I 2 C BUS SPECIFICATION (continued) Bus Register Initial Conditions Not used bits are preset to 0. Address Dec (HEX) Data Initial Value Comments 0 (00) XX Mid. contrast ; RGBext insertion enable (0) XX Mid. saturation 2 (02) XX Mid. brightness ; Blanking : normal mode 3 (03) XX Mid. RED drive adjust 4 (04) XX Mid. RED cut-off adjust 5 (05) XX Mid. GREEN drive adjust 6 (06) XX Mid. GREEN cut-off adjust 7 (07) XX Mid. BLUE drive adjust 8 (08) XX Mid. sharpness 9 (09) XX Mid. hue 0 (0A) XX00 00 Auto search color standard ; no SVHS (0B) XX Mid. horizontal shift 2 (0C) XX Mid. vertical amplitude 3 (0D) XX Mid. vertical position ; Auto search field frequency ; HOUT : normal mode 4 (0E) XX PLL time constant : normal mode ; Interlace ; 4/3 selection 5 (0F) XX Mid. volume 6 (0) XX Mute not active ; INT/FM IF mode ; Not used ; Cut-off pulses on lines 23/24/25 in 50Hz or lines 8/9/20 in 60Hz 7 () XX Test mode not active 9/25

10 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V CC Supply Voltage (Pins 22-42) (V CC(22) (42) ) 2 V T oper Operating Temperature 0, +70 Tstg Storage Temperature -55, +50 o C o C 28B-0.TBL THERMAL DATA Symbol Parameter Value Unit Rth (j-a) Junction-ambient Thermal Resistance (PD =.3W) Typ. 40 o C/W 28B-02.TBL ELECTRICAL CHARACTERISTICS (V CC =9V,T amb =25 o C, unless otherwise specified) Symbol Parameter Test Condition s Min. Typ. Max. Unit SUPPLY VCC Video Supply Voltage (VCC VCC2) V VCC2 Chroma & Scanning & Bus Supply Voltage V I CC V CC Current Consumption ma ICC2 VCC2 Current Consumption PAL/NTSC mode ma P tot Power Total Dissipation mw LUMINANCE /CVBS INPUT (Pin 20) DC20 DC Operating Voltage No input signal V V20PP CVBS or Y Input Voltage.4 VPP GY Luma Gain Contrast Max., Drive Max CTRY Luma Contrast Range db -I 20 Negative Clamping Current During sync. pulse µa I 20 Clamping Current 5 0 µa COMBINED CHROMINANCE AND SVHS SELECTION INPUT (Pin 23) V23 Chrominance Input Voltage Burst Amplitude, 00/75 colour bar 0.3 VPP V CLIP23 Input Amplitude before Clipping.0 V PP V DC23 DC Voltage SVHS mode.6 V V TH23 SVHS Threshold Voltage V Ilow23 Output Current 0V at Pin µa Vmin23 Minimum Burst Signal Amplitude within the ACC Control Range G ACC ACC Control Range Change of Burst over whole ACC control range < 2dB Killer Colour Killer on Threshold Colour killer off hysteresis RGB INPUTS (Pins ) Burst amplitude on Pin 20 or Pin 23, S/N > 40dB 30 mvpp 30 db VCLAMP Clamp Level Contrast Max., Drive Nom V 5 +3 mv PP db V RGB RGB Input Voltage 0.7 V PP GRGB RGB Gain Contrast Max., Drive Max CTR RGB RGB Contrast Range On external RGB (6-7-8).5 db Black Difference of Black Level of Internal and 200 mv External signals at the Outputs IRGB Clamping Current µa 28B-03.TBL 0/25

11 ELECTRICAL CHARACTERISTICS (VCC =9V,Tamb =25 o C, unless otherwise specified) (continued) Symbol Parameter Test Conditions Min. Typ. Max. Unit OSD FAST BLANKING INPUT (Pin 5) VTHFB-5 Insertion Threshold Voltage V V THFB2-5 Blanking Threshold Voltage V T swi-5 Insertion Switching Delay 30 ns T swi2-5 Blanking Switching Delay 50 ns IFB-5 Input Current 0V at Pin 5 50 µa EXTERNAL FAST BLANKING INPUT (Pin 9) VTHFB-9 Threshold Voltage V I FB-9 Input Current 0V at Pin 9 50 µa T swi-9 Switching Delay 30 ns CATHODE CURRENT INPUT (Pin 30) VLEAK Leakage Current Reference Voltage V VCoff Cut-off Current Reference Voltage refered to Leakage Current Reference 250 mv V SB Start Beam Current Detection V Reference Voltage I Low-30 Source current µa AUTOMATIC CUT-OFF CAPACITORS (Pins ) I Control Current µa BEAM CURRENT LIMITER VOLTAGE (Pin 3) V TH-3 Contrast Attenuation Starting 6.0 V V TH2-3 Brightness Attenuation Starting 5.5 V V TH3-3 Contrast Attenuation Ending 5.0 V CTR-BCL Contrast Attenuation at V3=VTH db VTH4-3 Brightness Attenuation Ending 4.5 V BRIG-BCL Brightness Attenuation at V3=VTH % CLP 3 High Clamping Voltage 6.5 V RGB OUTPUTS (Pins ) V BW Output Signal Amplitude (B to W) 0.7V B/W at Pin 20, Drive Max., Contrast Max., Brightness Typ., Saturation Typ V IS Output Sinking Current.5 2 ma V M Maximum Peak White Level 7.8 V VBlack Blanking Level No load V RCO Cut-off Output Range V DCCO Cut-off Adjustment Range On Red and Green ouputs 300 mv Pins 29 and 28, Drive Max. DRIV Drive Adjustment Range 6.5 db R BRIG Brightness Range Relative to B/W amplitude on % R,G,B outputs at Contrast Max. V CTR Variation of Black Level with Contrast 00 mv VSAT Variation of Black Level with Saturation 50 mv VREL Relative Variation in Black Level between the three Channels - during Variation of Contrast(20dB) - during Variation of Brightness (total range) - during Variation of Vcc (+/-0%) Drive Max. VTemp Black Level Thermal Drift mv/ o C 5 TBD TBD mv mv mv 28B-04.TBL /25

12 ELECTRICAL CHARACTERISTICS (VCC =9V,Tamb =25 o C, unless otherwise specified) (continued) Symbol Parameter Test Conditions Min. Typ. Max. Unit RGB OUTPUTS (Pins ) (continued) Track Tracking between Luminance and Chrominance Signals From Max. contrast (0dB) to -0dB contrast 2 db Bwidth S/N Res FILTERS Bandwith of Output Signals at -3dB - CVBS Input (no SVHS) PAL/NTSC - CVBS Input (no SVHS) PAL/NTSC - CVBS Input(no SVHS) SECAM - Y Input SVHS Mode - RGB Inputs Signal to Noise Ratio of Output (VPP/VRMS) 4.43MHz PAL/NTSC Signal on Y/CVBS Input Residual Frequency at f OSC at 2 fosc and Higher Harmonics f OSC = 3.58MHz, Sharp Typ. f OSC = 4.43MHz, Sharp Typ. fosc = 4.43MHz, no sharp No trap Filter, Sharp Typ. No signal on R-Y, B-Y inputs Contrast Max., Drive Max., Saturation Typ., Sharp Typ., Bandwidth 5MHz PAL/SECAM PAL/SECAM MHz MHz MHz MHz MHz 50 db mv PP mvpp VTUN Tuning Voltage Range (Pin 8) 3.2 to 4.8 V V TUN2 Cloche Tuning Voltage Range (Pin 9) 2.5 to 6.5 V Y DELAY LINE t dp Delay Time PAL 4.43MHz SVHS mode ns t dn Delay Time NTSC 3.58MHz SVHS mode ns td2 Delay Time SECAM SVHS mode ns td3p Delay Time PAL 4.43MHz CVBS mode ns t d3 Delay Time NTSC 3.58MHz CVBS mode ns td4 Delay Time SECAM CVBS mode ns SHARPNESS CIRCUIT (PAL/NTSC only) fsharp Center Frequency SVHS mode 2.5 MHz GSharp Gain Variation from Min. to Max. Sharp at fsharp 6 db Overshoot Amplitude Variation compared to B/W 2T pulse, Sharp Max. 50 % Pre-shoot Amplitude Variation compared to B/W 2T pulse, Sharp Max. -5 % After-shoot Amplitude Variation compared to B/W 2T pulse, Sharp Max. -40 % Coring Coring Range compared to B/W 0 % Y TRAP FILTER ftrap Trap Frequency PAL/NTSC -0.2 fosc +0.2 MHz Trap Frequency SECAM MHz Q Trap Trap Quality Factor (Q=/(fo/f-3dB - f-3db/fo)) Sharpness Min. Sharpness Max. CRejPN Color Subcarrier Rejection PAL mode, Sharpness Min. NTSC mode, Sharpness Min. CrejS Color Rejection SECAM Mode at 4.MHz at 4.4MHz CHROMINANCE BANDPASS f C Center Frequency f osc MHz Q BP Bandpass Quality Factor CLOCHE FILTER fcloche Resonant Frequency MHz QCloche Cloche Quality factor db db db db ACC CAPACITOR (Pin 5) I C5 Charging Current During burst gate window 250 µa IL5 Leakage Current 0.2 µa 28B-05.TBL 2/25

13 ELECTRICAL CHARACTERISTICS (VCC =9V,Tamb =25 o C, unless otherwise specified) (continued) Symbol Parameter Test Conditions Min. Typ. Max. Unit CHROMA PLL (Pins 2-3) CR 2-3 Catching Range Q = 4.43MHz (Pin 3) Q = 3.58MHz (Pin 2) PLL LOOP FILTER (Pin 4) ±600 ±500 I C4 Control Current During burst gate window 400 µa IL4 Leakage Current 5 µa HUE CONTROL (in NTSC mode only) CR HUE HUE Control Range ±25 ±45 Deg COLOR DIFFERENCE OUTPUT SIGNALS (Pins 40-4) PAL /NTSC DEMODULATORS V P40 R-Y Output signal Amplitude (Pin 40) RED-BLUE axes = 90 o 00/75 colour bar V PP VP4 B-Y Output Signal Amplitude (Pin 4) RED-BLUE axes = 90 o 00/75 colour bar VPP G PAL Gain Ratio of both Demodulators (B-Y)/(R-Y) RED-BLUE axes = 90 o /75 colour bar G NTSC Gain Ratio of both Demodulators (B-Y)/(R-Y) RED-BLUE axes = 04 o /75 colour bar VPNDC Output Voltage when colour killed V SECAM DEMODULATORS V S40 R-Y Output Signal Amplitude (Pin 40) 00/75 Colour Bar V PP V S4 B-Y Output Signal Amplitude (Pin 4) 00/75 Colour Bar V PP G SECAM Gain Ratio of both Demodulators (B-Y)/(R-Y) VSDC Output Voltage when colour killed V PAL /SECAM /NTSC (90 o ) MATRIX G/R (G-Y)/(R-Y) G/B (G-Y)/(B-Y) NTSC (04 o ) MATRIX NG/R (G-Y)/(R-Y) NG/B (G-Y)/(B-Y) SATURATION CONTROL SATMax. Maximum Saturation Control (3F) VPP CVBS on Pin db SAT Nom. Nominal Saturation Control (20) V PP CVBS on Pin 20 0 db SAT Min. Minimum Saturation Control(00) V PP CVBS on Pin db COLOUR DIFFERENCE INPUT SIGNALS (Pins 38-39) DCRYI DC Voltage Pin 39 No colour V DCBYI DC Voltage Pin 38 No colour V VRYI Input Signal Amplitude Pin 39 00/75 color bar.05 V PP VBYI Input Signal Amplitude Pin 38 00/75 color bar.33 VPP I CL38-39 Clamping Current During burst key 50 µa SYNC. SEPARATOR VSync Sync. Pulse Amplitude On Pin mv HORIZONTAL OSCILLATOR fh50 Frequency after Divider 50Hz input signal 5625 Hz f H60 Frequency after Divider 60Hz input signal 5750 Hz f Rang Frequency Control Range Low Frequency High Frequency ffree Free Running Frequency when PLL open Value 03hex in register 0Ehex Hz Hz Hz Hz Hz 28B-06.TBL 3/25

14 ELECTRICAL CHARACTERISTICS (VCC =9V,Tamb =25 o C, unless otherwise specified) (continued) Symbol Parameter Test Conditions Min. Typ. Max. Unit FIRST LOOP FILTER (Pin 33) ILOW-33 Long Time Constant Output Current ma I HIGH Short Time Constant Output Current ma I V LOW Very Long Time Constant ma SECOND CONTROL LOOP CRQ2 Control Range from Start of Horizontal Output to Flyback Horizontal position centered tshift Horizontal Shift Range 4 µs LINE FLYBACK INPUT/SANDCASTLE OUTPUT (Pin 37) 2 to 4 µs V SCO Output Voltage during Burst Key V V CL37 Clamped Input Voltage during Flyback V twbg Burst Key Pulse Width µs tdbg Delay of Start of Burst Key to Start of 5.2 µs Sync. V TH-37 Blanking Threshold Voltage V VTH2-37 PLL2 Threshold Voltage referred to Line Level V CL37 PLL2VTH/VCL37 80 % I37 Input Current During flyback pulse 0. ma HORIZONTAL OUTPUT (Pin 36) TW36 Output Pulse Width Normal operation µs V Low36 Voltage Output Low R pull-up = kω. V VCC Start VCC Start Level Voltage on Pin V V CC Stop V CC Stop Level : hysteresis Voltage on Pin 42, 0.60 V V CCstart -V CCstop I36 Max. Maximum Allowed Output Current 0 ma V36 Max. Maximum Allowed Output Voltage 2 V (open collector) T ss Output Pulse Duty Cycle in soft-start mode (Thigh/(Thigh + Tlow)) = 9V, V CC < 6.0V (VCC rising) 78 % VERTICAL OUTPUT (Pin 35) TW35 Output Pulse Width 0.5 Lines VLow35 Low Level Output Voltage 4/3 Low Level Ouput Voltage 6/9 XXXX0XXX (bin) in Reg. 0Ehex XXXXXXX (bin) in Reg. 0Ehex FR35 Locking Range Lines ffr-50 Free Frequency (no Video Signal) 50Hz or Auto Mode 34 Lines f FR-60 Free Frequency (no Video Signal) 60Hz Mode 264 Lines VHIGH35 High Level Range (vertical position control) XXXXX000(bin) in Reg. 0Dhex XXXXX(bin) in Reg. 0Dhex I sink Output Sinking Current 4/3 6/9 VERTICAL AMPLITUDE CONTROL (Pin 34) V 34R Output Voltage Range XX000000(bin) in Reg. 0Chex XX(bin) in Reg. 0Chex VOLUME CONTROL AND MUTE (Pin 0) VR0 Output Voltage Range (volume control) XX000000(bin) in Reg. 0Fhex XX(bin) in Reg. 0Fhex MUT Output Voltage when MUTE V V V V V ma ma V V V V 28B-07.TBL 4/25

15 ELECTRICAL CHARACTERISTICS (VCC =9V,Tamb =25 o C unless otherwise specified) (continued) Symbol Parameter Test Conditions Min. Typ. Max. Unit IF STANDARD CONTROL & SWITCH SELECTION (Pin ) VTV/NEG Output Voltage in TV Mode and Negative Vision Modulation VCC = 9V V VTV/POS Output Voltage in TV Mode and Positive Vision Modulation VCC = 9V V V Start/Pos Output Voltage in SCART Mode and Positive Vision Modulation V CC = 9V V VStart/Neg Output Voltage in SCART Mode and Negative Vision Modulation (open collector mode) VCC = 9V V R TV/Neg Output Resistance in TV Mode and 200 Ω Negative Vision Modulation R TV/Pos Output Resistance in TV Mode and 6.7 kω Positive Vision Modulation RScart/Pos Output Resistance in Scart Mode and kω Positive Vision Modulation R Scart/Neg Output Resistance in Scart Mode and Negative Vision Modulation (pull-up resistor to V CC ) 8 kω I 2 C BUS INPUTS (Pins 6-7) V TH6-7 Threshold Voltage V CL6-7 Capacitance of each Pin 5 0 pf ILeak6-7 Leakage Current Write Mode 0 on SDA or SCL 50 µa 28B-08.TBL 5/25

16 USER CONTROLS Figure : Contrast Control Curve Figure 2 : Saturation Control Curve 20 % 250 % F Code (HEX) 28B-03.EPS F Code (HEX) 28B-04.EPS Figure 3 : Brightness Control Curve Figure 4 : Hue Control Curve 30 % 60 Degrees ( ) (0) (20) (20) (40) (30) 00 0 F Code (HEX) 28B-05.EPS (60) F Code (HEX) 28B-06.EPS Figure 5 : Peaking Control (2T overshoot) Figure 6 : Volume Control Curve 60 % 6 Output Voltage (Pin 0) Code (HEX) 28B-07.EPS F Code (HEX) 28B-08.EPS 6/25

17 INPUT/OUTPUT PIN CONFIGURATION Figure 7 : Pins 2, 3 - CXTL, CXTL2 Figure 8 : Pin 4 - CLPF Pins B-09.EPS 28B-0.EPS Figure 9 : Pin 5 - ACC Figure 0 : Pin 6 - SDA B-.EPS 28B-2.EPS Figure : Pin 7 - SCL Figure 2 : Pin 8 - FTUN V CC B-3.EPS 28B-4.EPS 7/25

18 INPUT/OUTPUT PIN CONFIGURATION (continued) Figure 3 : Pin 9 - FTUN2 Figure 4 : Pin 0 - Volume B-5.EPS 28B-6.EPS Figure 5 : Pin - SWI Figure 6 : Pins 2,3,4,6, 7,8- RGB Inputs V CC Pins B-7.EPS GND 28B-8.EPS Figure 7 : Pins 5,9 - FBOSD, FBEXT Figure 8 : Pin 20 - Y/CVBS V CC V CC 20 Pins 5-9 GND 28B-9.EPS GND 28B-20.EPS 8/25

19 INPUT/OUTPUT PIN CONFIGURATION (continued) Figure 9 : Pin 23 - CHR/SVHS Figure 20 : Pins 24, 25, 26 - CG, CR, CB V CC 2 V CC V CC Pins B-2.EPS GND 28B-22.EPS Figure 2 : Pins 27, 28, 29 - BO, GO, RO Figure 22 : Pin 30 - ICAT V CC V CC Pins GND 28B-23.EPS GND 28B-24.EPS Figure 23 : Pin 3 - BCL Figure 24 : Pin 32 - SXTL V CC V CC 3 32 GND 28B-25.EPS 28B-26.EPS 9/25

20 INPUT/OUTPUT PIN CONFIGURATION (continued) Figure 25 : Pin 33 - SLPF Figure 26 : Pin 34 - VAMP B-27.EPS 28B-28.EPS Figure 27 : Pin 35 - VOUT Figure 28 : Pin 36 - HOUT B-29.EPS 28B-30.EPS Figure 29 : Pin 37 - LFB/SC Figure 30 : Pins 38, 39 - BYI, RYI V CC 37 Pins B-3.EPS 28B-32.EPS 20/25

21 INPUT/OUTPUT PIN CONFIGURATION (continued) Figure 3 : Pins 40, 4 - RYO, BYO Figure 32 : Pins 42, 22 - VCC2, VCC Pins V CC 22 2 GND 28B-33.EPS 28B-34.EPS 2/25

22 APPLICATION DIAGRAM 470µF 6V 9V 00nF 4 FROM OSD + TXT OBLK (overs ize blanking) I 2 C BUS TO STV8224 TO Pin42 3.9kΩ 3.9kΩ 3.9kΩ 2.2kΩ SDA SCL VOL SWI 390Ω 390Ω 390Ω kω 75Ω 330kΩ 270kΩ 00Ω 00Ω 00nF 47pF 47pF 8kΩ 4.7nF Y/CVBS Input V PP 3.58MHz 3.3pF 4.43MHz 33nF 00nF 00nF 22nF 22nF 22nF 22nF 22nF 22nF 220nF 2 CXTL2 3 CXTL 4 CLPF 5 ACC 6 SDA 7 SCL 8 FTUN 9 FTUN2 0 VOL SWI 2 BOSD 3 GOSD 4 ROSD 5 FBOSD 6 BEXT 7 GEXT 8 REXT 9 FBEXT 20 Y/CVBS S T V 2 8 B 42 BYO 4 RYO 40 RYI 39 BYI 38 LFB/SC 37 HOUT 36 VOUT 35 VAMP 34 SLPF 33 SXTL 32 BCL 3 ICAT 30 RO 29 GO 28 BO 27 CR 26 CB 25 CG 24 CHR/SVHS 23 0nF 0nF 0nF 0nF 503kHz 00nF 00nF 00nF kω 47kΩ 470Ω 470Ω 470Ω 0nF 9V TO DEFLECTION S TAGES µf 50V 3.3nF 220kΩ 5kΩ µf 22kΩ 4.7kΩ 8kΩ Pin nF 9V Pin 42 TO CRT AMPLIFIERS 00nF CHROMA INPUT (S -VHS) kΩ N448 S T V Ω N448 N448 00nF 00nF nf 9V 0Ω 47µF 6V 4.02kΩ % LFB (Heater) FROM HORIZONTAL STAGE 75Ω 2 GND 22 V CC kω 75Ω FROM EXTERNAL RGB 75Ω 00nF 75Ω 470µF 6V 9V 75Ω 28B-35.EPS Notes : - STV28B requires 2 XTALS (4.43MHz and 3.58MHz) for all operations (even with PAL and SECAM only signals). This drawback will be improved in new coming versions. - Recommended 4.43MHz XTAL is JAUCH Number /25

23 90 o CRT APPLICATIONS VERTICAL STAGE +2V 000µF 25V 22Ω 2W 3.9kΩ Vertical Yoke 470Ω VOUT (From STV28B Pin 35) 47µF 25V 270Ω.8kΩ 000µF 25V.2Ω 2.2Ω 220nF OUT 2 V+ 5kΩ 4.7kΩ 3 V.SYNC VAMP (From STV28B Pin 34) kω 00kΩ N448 00nF +9V 27kΩ BC547 47nF 5kΩ 5kΩ 620kΩ 60kΩ 330kΩ.3kΩ 47nF 0kΩ V.SIZE GND SAW BUFF T D A FEEDB 470kΩ +9V 00kΩ 56kΩ 560kΩ BC V N µF 25V 00µF 35V 9 V CC 0 FLYB BC µF 00kΩ OPTIONAL4/3-6/9 SWITCHING 28B-36.EPS 23/25

24 0 o CRT APPLICATIONS : Vertical System with East-West IN- C43 22pF +24V R3 330Ω Vertical Yoke R9.2Ω +2V R2 0Ω 3W C4 000µF 25V R2.5Ω C0 220nF +24V C9 000µF 35V C23 00µF D N V CC FLYBACK GND OUT OUT V CC T D A From STV28B Pin35 +2V +9V SCL C20 47µF SDA VOUT R8 2.4kΩ C34 00pFF T5 BC547 R52 4.7kΩ C56 220nF R8 330Ω R7 330Ω R30 470Ω V CC C44 220nF C48 4.7nF C5 33nF SCL SDA VRET REG V CC LPF CVERT S T V R3 00Ω SENSM 6 SENS P 5 FROUT 4 EWOUT 3 EWIN 2 OBLK HFLY 0 C39 0nF R57 22kΩ R20 3.6Ω C37 nf V CC R28 00Ω C36 0nF HFLY R43 kω R45 6.2kΩ V CC C5 2200µF C46 3.3nF T6 TIP22 R50.5kΩ D8 N448 V CC OBLK R47 39kΩ R4 3.3kΩ D2 N448 D4 N448 C3.5nF E/W MODULATOR C68 4.7µF 60V To STV28B Pin5 R26 0kΩ R36 3.3kΩ 7 IN+ +2V 8 GND BREATH 9 C54 nf R55 00kΩ R54 680kΩ R56 220kΩ R46 00kΩ BCL 28B-37.EPS 24/25

25 PACKAGE MECHANICAL DATA 42 PINS - PLASTIC SHRINK DIP E E A A2 L A B B e e e2 D c E ,38 Gage Plane 2 SDIP42 e3 e2 PMSDIP42.EPS Dimensions Millimeters Inches Min. Typ. Max. Min. Typ. Max. A A A B B c D E E e e e e L SDIP42.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. 996 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I 2 C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I 2 C Patent. Rights to use these components in a I 2 C system, is granted provided that the system conforms to the I 2 C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil -Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 25/25