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d a t a sh eet preliminary speci?cation supersedes data of may 1993 file under integrated circuits, ic02 july 1994 integrated circuits philips semiconductors tda8505 secam encoder
july 1994 2 philips semiconductors preliminary speci?cation secam encoder tda8505 features two input stages, r, g, b and y, - (r - y), - (b - y) with multiplexing. chrominance processing, highly integrated, includes vertical identification, low frequency pre-emphasis and high frequency pre-emphasis (anti-cloche) and bandpass filter. fully controlled fm modulator which produces a signal in accordance with the secam standard without adjustments. two reference oscillators, one for d'r f 0 (4.40625 mhz) and one for d'b f 0 (4.250 mhz). these oscillators are tuned by pll loop with the frequency of the line sync as reference. crystal tuning, or tuning by external reference source, of the reference oscillators is possible. output stages, cvbs and separated y + sync and chroma. for cvbs output, signal amplitude 2 v (p - p) nominal, thus only an external emitter follower is required for 75 w driving. sync separator circuit and pulse shaper, to generate the required pulses for the processing, line, frame, fh/2 and chrominance blanking. a 3-level sandcastle pulse is generated for pal/ntsc to secam transcoding. fh/2 input for locking with another decoder. colour killing on the internal colour difference signals. internal bandgap reference. general description the tda8505 is a highly integrated secam encoding ic that is designed for use in all applications that require transformation of r, g and b signals or y, u and v signals to a standard secam signal. the specification of the input signals is fully compatible with those of the tda8501 pal/ntsc encoder. ordering information type number package pins pin position material code tda8505 32 sdip32 plastic sot232-1
july 1994 3 philips semiconductors preliminary speci?cation secam encoder tda8505 block diagram handbook, full pagewidth mla951 - 3 pulse generator phase detector 272 divider 4.25 mhz vco sync separator switch phase detector 282 divider 4.406 mhz vco frame identi- fication clamp adder gain limiter fm modulator phase switch low-pass filter lf pre- emphasis chrominance blanking red input cl/bl 47 nf 7 green input cl/bl 47 nf 9 blue input cl/bl 47 nf 11 matrix switch sequence cl/bl cl/bl cl/bl 1 47 nf (r y) (b y) colour difference inputs luminance input 3 47 nf 5 47 nf multiplexer control input 2 test 6 v ref v ref fadj 14 reference voltage output flt output filter 16 cloche bandpass adder chrominance output 18 21 cvbs 2 v (p p) output 220 nf buffer 2 k w 22 23 notch output y+sync 1 v (p p) delay line 25 650 ns phase detector lpfdb output 15 phase detector lpfdr output 13 adder vco4.25 output control input (y/y sync) 12 sandcastle output 20 4 fh/2 input 28 colour killing input 22 nf composite sync input 29 30 32 10 8 v ssd v ddd v ssa v dda 47 ? 22 nf 100 nf 26 xtal/pll vident input lpf4.25 output lpf 4.4 output 31 24 tda8505 270 pf 27 y+sync output 2 v (p-p) y+sync input 17 19 external power supply (v ) ext 2.2 k w 4.7 m f 22 nf 1.2 k w 4.7 m f 100 nf 1 nf 3.9 k w 1 m f 6.8 nf 100 w 470 nf sandcastle 4.7 k w 1.8 k w 22 nf 22 k w 47 m f 22 nf fig.1 block diagram.
july 1994 4 philips semiconductors preliminary speci?cation secam encoder tda8505 pinning d'r and d'b are the colour difference signals at the output of the multiplexer circuit; d'r = - 1.9(r - y) and d'b = +1.5(b - y), for an ebu bar of 75% the amplitudes are equal. symbol pin description - (r - y) 1 colour difference input signal, for ebu bar of 75% 1.05 v (peak-to-peak value) mcontr 2 multiplexer control; input high = rgb, input low = - (r - y), - (b - y) and y - (b - y) 3 colour difference input signal, for ebu bar of 75% 1.33 v (peak-to-peak value) fh/2 4 line pulse input divided-by-2 for synchronizing two or more encoders; when not used this pin is connected to ground y 5 luminance input signal 1 v nominal without sync test 6 test pin; must be connected to v cc (pin 8), or left open-circuit r 7 red input signal for ebu bar of 75% 0.7 v (peak-to-peak value) v dda 8 analog supply voltage for encoder part; 5 v nominal g 9 green input signal for ebu bar of 75% 0.7 v (peak-to-peak value) v ssa 10 analog ground b 11 blue input signal for ebu bar of 75% 0.7 v (peak-to-peak value) y/y+sync 12 when this control input is low, y without sync is connected to pin 5, input blanking at pin 5 is active; when input is high, y+sync is connected to pin 5, input blanking at pin 5 is not active lpfdr 13 modulator control loop ?lter output; black level of d'r = 4.40625 mhz fadj 14 adjustment pin for 4.286 mhz of hf pre-emphasis ?lter lpfdb 15 modulator control loop ?lter output; black level of d'b = 4.250 mhz flt 16 ?lter tuning loop capacitor output v ref 17 2.5 v internal reference voltage output chroma 18 chrominance output, amplitude corresponds with y+sync at the output of the delay line v ext 19 external power supply for sandcastle generation; when not used this pin is connected to ground sand 20 3-level sandcastle output pulse cvbs 21 composite secam output 2 v (peak-to-peak value) nominal notch 22 y+sync output after an internal resistor of 2 k w ; a notch ?lter can be connected y+sync in 23 y+sync input, connected to the output of the delay line lpf4.4 24 loop ?lter output for 4.40625 mhz reference oscillator y+sync out 25 y+sync output, 2 v (peak-to-peak value) nominal, connected to the input of the delay line xtal/pll vident 26 control pin; input high = crystal tuning, input low = pll tuning, both without vertical identi?cation, 2.5 v = pll tuning with vertical identi?cation vco4.25 27 when used for pll tuning a capacitor is connected; when used for crystal tuning a crystal has to be connected (in series with a capacitor) colkil 28 colour killing; input high = active, internal colour difference signals are blanked cs 29 composite sync input, 0.3 v (peak-to-peak value) nominal
july 1994 5 philips semiconductors preliminary speci?cation secam encoder tda8505 v ssd 30 digital ground lpf4.25 31 loop ?lter output for 4.25 mhz reference oscillator; connected to pin 17 (v ref ) when external tuning by crystal or signal source v ddd 32 supply voltage for the digital part symbol pin description handbook, halfpage 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 17 18 19 20 21 22 23 24 25 26 mla952 - 3 mcontr fh/2 y test r v dda g v ddd lpf4.25 v ssd cs colkil vco4.25 xtal/pll vident lpf4.4 v ssa b lpfdr fadj lpfdb flt v ref chroma v sand cvbs notch y/y sync (b y) y+sync out (r y) y+sync in tda8505 ext fig.2 pin configuration.
july 1994 6 philips semiconductors preliminary speci?cation secam encoder tda8505 functional description the following three important circuits are integrated: encoder circuit modulator control circuit sync separator and pulse shaper. encoder circuit i nput stage r, g and b inputs are connected to the matrix via a clamping and a blanking circuit. for an ebu colour bar of 75% the amplitude of the signal must be 0.7 v (peak-to-peak value). the outputs of the matrix are y, d'r and d'b. the second part of the input stage contains inputs for colour difference signals and a luminance signal. the condition for 75% colour bar is - (r - y) = 1.05 v (peak-to-peak value) at pin 1, - (b - y) = 1.33 v (peak-to-peak value) at pin 3 and y = 1 v (peak-to-peak value) without sync at pin 5. after clamping and blanking the amplitude and polarity are corrected such that the signals are equal to the signals of the matrix output. signals are connected to a switch. fast switching between the two input parts is possible by the multiplexer control pin (pin 2). the y output signal of the multiplexer is added to the sync pulse of the sync separator. the y input (pin 5) is different to the other 5 inputs. the timing of the internal clamping is after the sync period and there is no vertical blanking. the input blanking of y can be switched off by a high at pin 12, and the internal sync separator signal is not added to the y signal. in this way the y+sync is allowed at pin 5 and after clamping internally connected directly to pin 25. the colour difference signals are switched sequentially by h/2 and fed to the low frequency pre-emphasis circuit. the colour-killing input signal at pin 28 can be used for completely blanking the internal colour difference signals at the input of the low frequency pre-emphasis filter. l ow frequency pre - emphasis this filter is fully integrated, fig.3 illustrates the nominal response. the transfer is guaranteed within the illustrated area for the whole ambient temperature range by a compensation circuit. fig.3 nominal response for the low frequency pre-emphasis filter. handbook, full pagewidth 10 mla953 - 1 10 6 10 5 10 4 0 8 6 4 2 2 4 f (hz) h (db) 10 7
july 1994 7 philips semiconductors preliminary speci?cation secam encoder tda8505 v ertical identification after the low frequency pre-emphasis the signal is clamped and, if desired the vertical identification sawtooth waveform can be added. the generation of the vertical identification is switched on/off by the logic level input at pin 26. figure 4 shows the sawtooth waveform at the input of the fm modulator with the corresponding frequency values after modulation. vertical identification is only possible if pll tuning is selected. g ain + limiter the gain of this amplifier is sequentially switched, so that the amplitude of d'r is 280/230 times the amplitude of d'b (based on an ebu colour bar). the signal is limited at a lower and upper level to ensure that the fm modulator frequencies are always between 3.9 mhz and 4.756 mhz. a dc offset between d'r and d'b is added which corresponds with the limiter levels. fm modulator the signal of the gain + limiter stage is fed to the fm modulator. the modulator control adjusts the dc level at pin 13 to set the frequency of the fm signal to 4.406 mhz at the black level of d'r. the modulator control also sets the dc level at pin 15 to adjust the fm frequency to 4.250 mhz at the black level of d'b. at the start of every line the fm modulator is stopped and is started again by a short duration pulse of the pulse shaper. these stop/start pulses are operating such that after two lines starting in the same phase, the start phase of the third line is shifted 180 degrees. this sequence is inverted during each vertical blanking. the fm signal is fed to the internal hf pre-emphasis filter. hf pre - emphasis and bandpass filter an hf pre-emphasis filter combined with a bandpass filter is integrated. figures 5 and 6 illustrate the frequency response. two resistors in series with a potentiometer at pin 14 adjusts the frequency to 4.286 mhz with a tolerance of 20 khz. a tuning circuit integrated with an external capacitor connected to pin 16 guarantees a stable frequency response for the whole temperature range. the output of the bandpass filter is connected directly to the chrominance blanking circuit. fig.4 vertical identification sawtooth waveform input. handbook, full pagewidth mla954 64 m s 64 m s 3.90 mhz 4.250 mhz 4.406 mhz 4.756 mhz frequency after modulation 35 khz 35 khz d'r d'b 18 s m 6 s m 15 s m 5 s m
july 1994 8 philips semiconductors preliminary speci?cation secam encoder tda8505 handbook, full pagewidth mla955 - 1 10 8 10 7 10 6 10 5 20 60 40 f (hz) 0 80 100 h (db) fig.5 frequency response of the hf pre-emphasis and bandpass filter; h as a function of frequency (1). fig.6 frequency response of the hf pre-emphasis and bandpass filter; h as a function of frequency (2). handbook, full pagewidth 4.9 16 2 3.7 4.1 4.5 mla956 - 1 10 4 3.9 4.3 4.7 0 2 6 8 12 14 f (mhz) upper limit nominal lower limit h (db)
july 1994 9 philips semiconductors preliminary speci?cation secam encoder tda8505 c hrominance blanking the chrominance signal is blanked by the internally generated chrominance blanking pulse. the output of this blanking stage is connected to the chrominance and cvbs output circuits. y+sync, cvbs, and chroma outputs the y output signal of the matrix is added to the composite sync signal of the sync separator. the output of this adder at pin 25 is connected to the input of an external delay line which is necessary for correct timing of the y+sync signal corresponding with the chrominance signal. the signal amplitude at pin 25 is 2 v (peak-to-peak value) nominal, so at the output of the delay line y+sync is 1 v (peak-to-peak value). the delay line has to be dc-coupled between pins 25 and 23 to ensure the required dc level at pin 23. the output resistor of the delay line has to be connected to pin 17 where (v ref = 2.5 v). the output of the delay line is connected to pin 23 which is the input of a buffer operational amplifier. the output of the buffer operational amplifier is connected to pin 22 and to the cvbs adder stage via an internal resistor of 2 k w . an external notch filter can be connected to pin 22. the cvbs signal amplitude output at pin 21 is 2 v (peak-to-peak value) nominal. an external emitter follower is used to provide a 75 w output load. the amplitude of the chrominance output signal which is connected to pin 18 corresponds with the y+sync signal at the output of the delay line. modulator control circuit the modulator control circuit has two tuning modes which are controlled by the input at pin 26: tuning by line frequency tuning by crystal or external signal source. t uning by line frequency two reference voltage controlled oscillators (vcos) are integrated, the 4.4 mhz vco with an internal capacitor and the 4.25 mhz vco with an external capacitor at pin 27. a pll loop with divider circuits directly couples the frequencies of the two vcos with the line frequency of the sync separator sync signal. the loop filter for the 4.40625 mhz reference is at pin 24 and the loop filter for the 4.250 mhz reference is at pin 31. the outputs of the 272 divider are also used for pulse shaping. within the vertical blanking period, another two phase locked loops (plls) synchronizes the fm modulator during two lines with the 4.406 mhz reference vco and during the following 2 lines with the 4.250 mhz reference vco. the loop filters are connected to pins 13 and 15 respectively. it is necessary to use low-leakage capacitors for these loop filters. t uning by crystal or external signal source when the frequency of the sync pulse at pin 29 is not stable or is incorrect it is possible to tune the fm modulator using an external 4.250 mhz crystal connected to pin 27. the 4.25 mhz loop at pin 31 has to be connected to pin 17 (v ref ). a stable line frequency reference is generated by the 272 divider circuit which is used for the 4.406 mhz reference loop. an external signal source, instead of a crystal, can be connected at pin 27 via a capacitor in series with a resistor. the minimum ac current of 50 m a is determined by the resistor values (r int +r ext ) and the output voltage of the signal source (see fig.7). when crystal tuning is used no vertical identification is possible. crystal tuning is recommended for vtr signals. handbook, halfpage msa732 - 1 1 nf r ext i 50 a m signal source 27 r int 800 w oscillator tda8505 v (p-p) fig.7 tuning circuit for external signal source.
july 1994 10 philips semiconductors preliminary speci?cation secam encoder tda8505 sync separator and pulse shaper the composite sync input at pin 29 together with the outputs of the 272 divider of the 4.250 mhz reference loop are the sources for all pulses necessary for the processing. the pulses are used for: clamping video blanking fh/2 chrominance blanking stop/start of modulator vertical identification timing for the modulator control sandcastle pulse shaping at pin 20. external fh/2 at pin 4 is only necessary when two or more secam encoders have to be locked in the same phase. the phase of the internal fh/2 can be locked with an external fh/2 connected at pin 4. a reset of the internal fh/2 is possible by forcing pin 4 to a high level. this high level corresponds with d'r. pin 4 is connected to ground when not used. figures 9 and 10 show the generated pulses during vertical blanking for pll tuning or crystal tuning respectively. figure 11 shows the pulses during line blanking. transcoding application a sandcastle pulse is necessary for the pal/ntsc demodulator (i.e. tda4510) for transcoding pal or ntsc to secam. most of the demodulator ics use a sandcastle pulse with an amplitude of 12 v or 8 v. a 12 v or 8 v sandcastle is not possible with the tda8505 because of the 5 v power supply. to generate a 3-level sandcastle pulse at pin 20 (see fig.8) an external supply voltage must be connected to pin 19. the pal or ntsc cvbs signal is connected to the composite sync input (pin 29) for pll tuning and pulse shaping. as previously mentioned the y input at pin 5 can be used as the y+sync input for the filtered y+sync pal or ntsc signal, when pin 12 is at a high level. fig.8 3-level sandcastle pulse. handbook, full pagewidth msa733 - 1 v ext 4.5 v 0.2 v 2.5 v 0.2 v 0.5 v
july 1994 11 philips semiconductors preliminary speci?cation secam encoder tda8505 2 1 625 624 623 622 313 312 311 310 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 field 2 field 1 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 fig.9 pll tuning.
july 1994 12 philips semiconductors preliminary speci?cation secam encoder tda8505 2 1 625 624 623 622 313 312 311 310 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 field 2 field 1 345 67 89101112131415161718192021222324 fig.10 crystal tuning.
july 1994 13 philips semiconductors preliminary speci?cation secam encoder tda8505 fig.11 pulses during line blanking.
july 1994 14 philips semiconductors preliminary speci?cation secam encoder tda8505 limiting values in accordance with the absolute maximum rating system (iec 134); all voltages referenced to v ssa pin 10. thermal characteristics dc characteristics v cc and v dd =5v; t amb =25 c; all voltages referenced to pins 10 and 30; unless otherwise speci?ed. ac characteristics v cc and v dd =5v; t amb =25 c; composite sync signal connected to pin 29; unless otherwise speci?ed. symbol parameter min. max. unit v dda analog supply voltage for encoder part 0 5.5 v v ddd digital supply voltage 0 5.5 v v ext external supply voltage for sandcastle generation 0 13.2 v t stg storage temperature - 65 +150 c t amb operating ambient temperature - 25 +70 c symbol parameter value unit r th j-a thermal resistance from junction to ambient in free air 60 k/w symbol parameter min. typ. max. unit v dda analog supply voltage for encoder part (pin 8) 4.5 5.0 5.5 v v ddd digital supply voltage (pin 32) 4.5 5.0 5.5 v i dda analog supply current - 39 - ma i ddd digital supply current - 4 - ma v ext external supply voltage for sandcastle generation 0 8 to 12 13.2 v p tot total power dissipation - 215 - mw v ref reference voltage output (pin 17) 2.425 2.5 2.575 v symbol parameter conditions min. typ. max. unit encoder circuit: input stage (pins 1, 3, 5, 7, 9 and 11; black level = clamping level v n(max) voltage from black level positive 1.2 -- v v n(min) voltage from black level negative only pins 1, 3 and 5 0.9 -- v i bias(max) maximum input bias current v i =v 17 -- 1 m a v i input voltage clamped input capacitor connected to ground - v 17 - v z i input clamping impedance i i = 1 ma - 80 -w i o = 1 ma - 80 -w
july 1994 15 philips semiconductors preliminary speci?cation secam encoder tda8505 multiplexer control (pin 2; note 1) v il low level input voltage y, - (r - y) and - (b - y) 0 - 0.4 v v ih high level input voltage r, g and b 1 - 5v i i input current --- 3 m a t sw switching time - 50 - ns control input y/y+sync (pin 12) v il low level input voltage blanking pin 5 active; internal sync added to y 0 - 1v v ih high level input voltage blanking pin 5 inactive; internal sync not added to y 4 - 5v i i(max) maximum input current -- 1 m a xtal/pll and vident input (pin 26) v il low level input voltage pll mode; vertical identi?cation off 0 - 1v v ih high level input voltage crystal tuning; vertical identi?cation off 4 - 5v v i input voltage pin 26 connected to pin 17; pll tuning; vertical identi?cation on; see fig.4 - v 17 - v i i input current --- 6 m a colkil input (pin 28) v il low level input voltage inactive 0 - 1v v ih high level input voltage active 4 - 5v i i(max) maximum input current -- 1 m a fh/2 input (pin 4) v il low level input voltage inactive 0 - 1v v ih high level input voltage active 4 - 5v i i(max) maximum input current -- 1 m a lf pre-emphasis (see fig.3) hf pre-emphasis and bandpass (see figs 5 and 6) fadj input (pin 14) resistor value for correct adjustment; see fig.1 input sensitivity - 1.75 - khz/mv i i(max) maximum input current -- 100 na symbol parameter conditions min. typ. max. unit
july 1994 16 philips semiconductors preliminary speci?cation secam encoder tda8505 flt output (pin 16) v dcl limited dc low level output voltage i o = 200 m a - 0.27 - v v dch limited dc high level output voltage i i = 200 m a - 1.8 - v v dc dc level output voltage tbf 0.86 tbf v y+sync output (pin 25) r o output resistance -- 40 w i sink(max) maximum sink current 200 --m a i source(max) maximum source current 1 -- ma v bl black level output voltage - 1.6 - v v sync sync voltage amplitude 570 600 630 mv v y y voltage amplitude 1330 1400 1470 mv b bandwidth frequency response r l =10k w ; c l =10pf 10 -- mhz t d group delay time tolerance r l =10k w ; c l =10pf -- 20 ns t d sync delay time from pin 29 to pin 25 220 290 360 ns t d y delay time from pin 5 to pin 25 - 10 - ns y+sync input (pin 23; note 2) i bias input bias current -- 1 m a v i(max) maximum y voltage amplitude -- 1v notch output (pin 22) r o output resistance 1750 2000 2250 w v dc dc output voltage level - v 23 - v i sink(max) maximum sink current 300 --m a chroma output (pin 18) i sink(max) maximum sink current 200 --m a i source(max) maximum source current 1 -- ma v dc dc voltage level - 2.5 - v d v dc variation of dc voltage level chrominance signal blanked - 5 - mv chrominance signal not blanked - 5 - mv r o output resistance - 120 -w v o(p-p) chrominance output voltage amplitude (peak-to-peak value) f = 4.25 mhz - 165 - mv f = 4.406 mhz - 205 - mv symbol parameter conditions min. typ. max. unit
july 1994 17 philips semiconductors preliminary speci?cation secam encoder tda8505 f requency of chrominance signal ( note 3) f or black level of d'r - 4406 - khz f ob black level of d'b - 4250 - khz f max maximum frequency 4721 4756 4791 khz f min minimum frequency 3865 3900 3935 khz d d'r deviation of d'r ebu bar of 75% 252 280 308 khz d d'b deviation of d'b ebu bar of 75% 207 230 253 khz cvbs output (pin 21) i sink(max) maximum sink current 250 --m a i source(max) maximum source current 1 -- ma v black black level voltage - 1.6 - v g y gain y+sync (pin 23 to pin 21) - 6 - db g chr gain chroma (pin 18 to pin 21) - 6 - db r o output resistance - 120 -w lpfdr output (pin 13) v o dc control voltage level tbf 2.4 tbf v control sensitivity - 0.2 - khz/mv i lo output leakage current -- 50 na lpfdb output (pin 15) v o dc control voltage level tbf 2.1 tbf v control sensitivity - 1.5 - khz/mv i lo output leakage current -- 50 na lpf4.4 output (pin 24) v o dc control voltage level tbf 2.3 tbf v control sensitivity - 1.5 - khz/mv i lo output leakage current -- 100 na lpf4.25 output (pin 31; c ext = 270 pf) v o dc control voltage level tbf 2.3 tbf v control sensitivity - 5.3 - khz/mv i lo output leakage current -- 100 na vco4.25 (pin 27; note 4) cs input (pin 29) v i(p-p) sync pulse input amplitude (peak-to-peak value) 75 300 600 mv slicing level - 50 - % i i input current - 4 -m a i o(max) maximum output current during sync - 100 -m a symbol parameter conditions min. typ. max. unit
july 1994 18 philips semiconductors preliminary speci?cation secam encoder tda8505 notes 1. the threshold level of pin 2 is 700 20 mv. the specification of the high and low levels is in accordance with the scart fast blanking. 2. the black level of input signal must be 2 v; amplitude 1 v (peak-to-peak value) nominal (y = 700 mv, sync = 300 mv). 3. the tolerances of f or and f ob are with the printed-circuit board < 5 khz. this value can be influenced by the print layout. 4. the oscillator operates in series-resonance. the resonance resistance of the crystal must be < 60 w and parallel capacitance of the crystal < 10 pf. internal circuitry v ext (pin 19) i ext external supply current -- 1.5 ma sand output (pin 20; v ext = 13.2 v); see fig.8 i sink(max) maximum sink current 100 --m a i source(max) maximum source current 100 --m a v tl top voltage level v ext < 10 v v ext - 0. 1 -- v v ext > 10 v 10 -- v pin name circuit description 1 - (r - y) - (r - y) input; connected via 47 nf capacitor; 1.05 v (peak-to-peak value) for ebu bar of 75%; see also pins 3, 5, 7, 9 and 11 symbol parameter conditions min. typ. max. unit
july 1994 19 philips semiconductors preliminary speci?cation secam encoder tda8505 2 mcontr multiplexer control input: < 0.4 v y, u and v > 1 v r, g and b 3 - (b - y) see pin 1 - (b - y) input; connected via 47 nf capacitor; 1.33 v (peak-to-peak value) for ebu bar of 75% 4 fh/2 fh/2 input; forcing possibility; when not used this pin is connected to ground 5 y see pin 1 y input; connected via 47 nf capacitor; 1 v (peak-to-peak value) for ebu bar of 75% 6 test test pin; connected to v cc or left open-circuit pin name circuit description b
july 1994 20 philips semiconductors preliminary speci?cation secam encoder tda8505 7 r see pin 1 red input; connected via 47 nf capacitor; 0.7 v (peak-to-peak value) for ebu bar of 75% 8v dda analog supply voltage for encoder part; 5 v nominal 9 g see pin 1 green input; connected via 47 nf capacitor; 0.7 v (peak-to-peak value) for ebu bar of 75% 10 v ssa analog ground 11 b see pin 1 blue input; connected via 47 nf capacitor; 0.7 v (peak-to-peak value) for ebu bar of 75% 12 y/y+sync control pin: 0 v y without sync supplied to pin 5 5 v y with sync supplied to pin 5 pin name circuit description
july 1994 21 philips semiconductors preliminary speci?cation secam encoder tda8505 13 lpfdr modulator control loop ?lter with low leakage capacitors 14 fadj adjustment pin for 4.286 mhz: potentiometer in series with two resistors between ground and pin 17 15 lpfdb see pin 13 modulator control loop ?lter with low leakage capacitors 16 flt ?lter control pin; 220 nf capacitor to ground pin name circuit description b b
july 1994 22 philips semiconductors preliminary speci?cation secam encoder tda8505 17 v ref 2.5 v reference voltage decoupling with 47 m f and 22 nf capacitors 18 chroma chrominance output 19 v ext pin for external power supply, for sandcastle pulse; v ext > 8 v; if not used, the pin should be connected to ground 20 sand sandcastle pulse pin name circuit description
july 1994 23 philips semiconductors preliminary speci?cation secam encoder tda8505 21 cvbs composite secam output 22 notch pin for external notch ?lter 23 y+sync in input of the delayed y+sync signal of the delay line; black level must be 2 v 24 lpf4.4 see pin 13 loop ?lter for 4.40625 mhz reference oscillator pin name circuit description
july 1994 24 philips semiconductors preliminary speci?cation secam encoder tda8505 25 y+sync out output of the delayed y+sync signal, connected to the delay line via a resistor 26 xtal/pll vident control pin: without vertical identification: 0 v pll tuning 5 v crystal tuning with vertical identification: 2.5 v pll tuning 27 vco4.25 tuning of 4.25 mhz oscillator: pll tuning: c = 270 pf to ground crystal tuning: crystal in series with a capacitor to ground external tuning: signal via 1 nf capacitor in series with a resistor pin name circuit description b b b b b b b b
july 1994 25 philips semiconductors preliminary speci?cation secam encoder tda8505 28 colkil colour killing input: 0 v not active 5 v active, internal d'r and d'b are blanked 29 cs composite sync signal input; amplitude <600 mv (peak-to-peak value) 30 v ssd digital ground pin name circuit description b b b b b b b b
july 1994 26 philips semiconductors preliminary speci?cation secam encoder tda8505 31 lpf4.25 loop ?lter for 4.25 mhz reference oscillator; connected to pin 17 if crystal or external tuning 32 v ddd supply voltage digital part; 5 v nominal pin name circuit description
july 1994 27 philips semiconductors preliminary speci?cation secam encoder tda8505 package outline fig.12 plastic shrink dual in-line package; 32 leads (400 mil) (sdip32; sot232-1). dimensions in mm. 17 16 1.3 max 9.1 8.7 29.4 28.5 3.8 max 4.7 max 0.51 min 0.18 m 0.53 max 1.778 (15x) 3.2 2.8 seating plane 1.6 max 10.7 10.2 0.32 max 10.16 12.2 10.5 msa270 32 1
july 1994 28 philips semiconductors preliminary speci?cation secam encoder tda8505 soldering plastic dual in-line packages b y dip or wave the maximum permissible temperature of the solder is 260 c; this temperature must not be in contact with the joint for more than 5 s. the total contact time of successive solder waves must not exceed 5 s. the device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified storage maximum. if the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. r epairing soldered joints apply a low voltage soldering iron below the seating plane (or not more than 2 mm above it). if its temperature is below 300 c, it must not be in contact for more than 10 s; if between 300 and 400 c, for not more than 5 s. definitions life support applications these products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify philips for any damages resulting from such improper use or sale. data sheet status objective speci?cation this data sheet contains target or goal speci?cations for product development. preliminary speci?cation this data sheet contains preliminary data; supplementary data may be published later. product speci?cation this data sheet contains ?nal product speci?cations. limiting values limiting values given are in accordance with the absolute maximum rating system (iec 134). stress above one or more of the limiting values may cause permanent damage to the device. these are stress ratings only and operation of the device at these or at any other conditions above those given in the characteristics sections of the speci?cation is not implied. exposure to limiting values for extended periods may affect device reliability. application information where application information is given, it is advisory and does not form part of the speci?cation.
july 1994 29 philips semiconductors preliminary speci?cation secam encoder tda8505 notes
july 1994 30 philips semiconductors preliminary speci?cation secam encoder tda8505 notes
july 1994 31 philips semiconductors preliminary speci?cation secam encoder tda8505 notes
philips semiconductors philips semiconductors C a worldwide company argentina: ierod, av. juramento 1992 - 14.b, (1428) buenos aires, tel. (541)786 7633, fax. (541)786 9367 australia: 34 waterloo road, north ryde, nsw 2113, tel. (02)805 4455, fax. (02)805 4466 austria: triester str. 64, a-1101 wien, p.o. box 213, tel. (01)60 101-1236, fax. (01)60 101-1211 belgium: postbus 90050, 5600 pb eindhoven, the netherlands, tel. (31)40 783 749, fax. (31)40 788 399 brazil: rua do rocio 220 - 5 th floor, suite 51, cep: 04552-903-s?o paulo-sp, brazil. p.o. box 7383 (01064-970). tel. (011)821-2333, fax. (011)829-1849 canada: integrated circuits: tel. (800)234-7381, fax. (708)296-8556 discrete semiconductors: 601 milner ave, scarborough, ontario, m1b 1m8, tel. (0416)292 5161 ext. 2336, fax. (0416)292 4477 chile: av. santa maria 0760, santiago, tel. (02)773 816, fax. (02)777 6730 colombia: iprelenso ltda, carrera 21 no. 56-17, 77621 bogota, tel. (571)249 7624/(571)217 4609, fax. (571)217 4549 denmark: prags boulevard 80, pb 1919, dk-2300 copenhagen s, tel. (032)88 2636, fax. (031)57 1949 finland: sinikalliontie 3, fin-02630 espoo, tel. (9)0-50261, fax. (9)0-520971 france: 4 rue du port-aux-vins, bp317, 92156 suresnes cedex, tel. (01)4099 6161, fax. (01)4099 6427 germany: philips components ub der philips g.m.b.h., p.o. box 10 63 23, 20043 hamburg, tel. (040)3296-0, fax. (040)3296 213. greece: no. 15, 25th march street, gr 17778 tavros, tel. (01)4894 339/4894 911, fax. (01)4814 240 hong kong: philips hong kong ltd., components div., 6/f philips ind. bldg., 24-28 kung yip st., kwai chung, n.t., tel. (852)424 5121, fax. (852)428 6729 india: philips india ltd, components dept, shivsagar estate, a block , dr. annie besant rd. worli, bombay 400 018 tel. (022)4938 541, fax. (022)4938 722 indonesia: philips house, jalan h.r. rasuna said kav. 3-4, p.o. box 4252, jakarta 12950, tel. (021)5201 122, fax. (021)5205 189 ireland: newstead, clonskeagh, dublin 14, tel. (01)640 000, fax. (01)640 200 italy: philips components s.r.l., viale f. testi, 327, 20162 milano, tel. (02)6752.3302, fax. (02)6752 3300. japan: philips bldg 13-37, kohnan 2 -chome, minato-ku, tokyo 108, tel. (03)3740 5028, fax. (03)3740 0580 korea: (republic of) philips house, 260-199 itaewon-dong, yongsan-ku, seoul, tel. (02)794-5011, fax. (02)798-8022 malaysia: no. 76 jalan universiti, 46200 petaling jaya, selangor, tel. (03)750 5214, fax. (03)757 4880 mexico: philips components, 5900 gateway east, suite 200, el paso, tx 79905, tel. 9-5(800)234-7381, fax. (708)296-8556 netherlands: postbus 90050, 5600 pb eindhoven, bldg. vb tel. (040)783749, fax. (040)788399 new zealand: 2 wagener place, c.p.o. box 1041, auckland, tel. (09)849-4160, fax. (09)849-7811 norway: box 1, manglerud 0612, oslo, tel. (022)74 8000, fax. (022)74 8341 pakistan: philips electrical industries of pakistan ltd., exchange bldg. st-2/a, block 9, kda scheme 5, clifton, karachi 75600, tel. (021)587 4641-49, fax. (021)577035/5874546. philippines: philips semiconductors philippines inc, 106 valero st. salcedo village, p.o. box 2108 mcc, makati, metro manila, tel. (02)810 0161, fax. (02)817 3474 portugal: philips portuguesa, s.a., rua dr. antnio loureiro borges 5, arquiparque - miraflores, apartado 300, 2795 linda-a-velha, tel. (01)14163160/4163333, fax. (01)14163174/4163366. singapore: lorong 1, toa payoh, singapore 1231, tel. (65)350 2000, fax. (65)251 6500 south africa: s.a. philips pty ltd., components division, 195-215 main road martindale, 2092 johannesburg, p.o. box 7430 johannesburg 2000, tel. (011)470-5911, fax. (011)470-5494. spain: balmes 22, 08007 barcelona, tel. (03)301 6312, fax. (03)301 42 43 sweden: kottbygatan 7, akalla. s-164 85 stockholm, tel. (0)8-632 2000, fax. (0)8-632 2745 switzerland: allmendstrasse 140, ch-8027 zrich, tel. (01)488 2211, fax. (01)481 77 30 taiwan: philips taiwan ltd., 23-30f, 66, chung hsiao west road, sec. 1. taipeh, taiwan roc, p.o. box 22978, taipei 100, tel. (02)388 7666, fax. (02)382 4382. thailand: philips electronics (thailand) ltd., 209/2 sanpavuth-bangna road prakanong, bangkok 10260, thailand, tel. (662)398-0141, fax. (662)398-3319. turkey: talatpasa cad. no. 5, 80640 gltepe/istanbul, tel. (0 212)279 2770, fax. (0212)269 3094 united kingdom: philips semiconductors limited, p.o. box 65, philips house, torrington place, london, wc1e 7hd, tel. (071)436 41 44, fax. (071)323 03 42 united states: integrated circuits: 811 east arques avenue, sunnyvale, ca 94088-3409, tel. (800)234-7381, fax. (708)296-8556 discrete semiconductors: 2001 west blue heron blvd., p.o. box 10330, riviera beach, florida 33404, tel. (800)447-3762 and (407)881-3200, fax. (407)881-3300 uruguay: coronel mora 433, montevideo, tel. (02)70-4044, fax. (02)92 0601 for all other countries apply to: philips semiconductors, international marketing and sales, building baf-1, p.o. box 218, 5600 md, eindhoven, the netherlands, telex 35000 phtcnl, fax. +31-40-724825 scd32 ? philips electronics n.v. 1994 all rights are reserved. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. no liability will be accepted by the publisher for any consequence of its use. publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. printed in the netherlands 533061/1500/03/pp32 date of release: july 1994 document order number: 9397 736 70011
go to philips semiconductors' home page select & go... start part catalog & datasheets catalog by function discrete semiconductors audio clocks and watches data communications microcontrollers peripherals standard analog video wired communications wireless communications catalog by system automotive consumer multimedia systems communications pc/pc-peripherals cross reference models packages application notes selection guides other technical documentation end of life information datahandbook system relevant links about catalog tree about search about this site subscribe to enews catalog & datasheets search tda8505 tda8505 information as of 2000 - 08 - 24 tda8505; secam encoder the tda8505 is a highly integrated secam encoding ic that is designed for use in all applications that require transformation of r, g and b signals or y, u and v signals to a standard secam signal. the specification of the input signals is fully compatible with those of the tda8501 pal/ntsc encoder. l two input stages, r, g, b and y, -(r-y), -(b-y) with multiplexing. l chrominance processing, highly integrated, includes vertical identification, low frequency pre-emphasis and high frequency pre- emphasis (anti-cloche) and bandpass filter. l fully controlled fm modulator which produces a signal in accordance with the secam standard without adjustments. l two reference oscillators, one for d'r f 0 (4.40625 mhz) and one for d'b f 0 (4.250 mhz). these oscillators are tuned by pll loop with the frequency of the line sync as reference. crystal tuning, or tuning by external reference source, of the reference oscillators is possible. l output stages, cvbs and separated y + sync and chroma. for cvbs output, signal amplitude 2 v (p-p) nominal, thus only an external emitter follower is required for 75 w driving. l sync separator circuit and pulse shaper, to generate the required pulses for the processing, line, frame, fh/2 and chrominance blanking. l a 3-level sandcastle pulse is generated for pal/ntsc to secam transcoding. l fh/2 input for locking with another decoder. l colour killing on the internal colour difference signals. l internal bandgap reference. ? description ? features ? datasheet ? products, packages, availability and ordering ? find similar products ? to be kept informed on tda8505, subscribe to enews. subscribe to enews description features datasheet
please read information about some discontinued variants of this product . tda8505 links to the similar products page containing an overview of products that are similar in function or related to the part number(s) as listed on this page. the similar products page includes products from the same catalog tree(s) , relevant selection guides and products from the same functional category. type nr. title publication release date datasheet status page count file size (kb) datasheet tda8505 secam encoder 01-jul-94 preliminary specification 32 466 download products, packages, availability and ordering partnumber north american partnumber order code (12nc) marking/packing package device status buy online tda8505/n2 tda8505nb 9351 630 70112 standard marking * tube sot232 samples available find similar products: copyright ? 2000 royal philips electronics all rights reserved. terms and conditions .

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