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sanyo electric co.,ltd. semiconductor company tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan ordering number : enn7734 32504tn (ot) no.7734-1/11 overview the LC78604E cmos ic implements the signal processing, servo control, led display, button state acquisition, and remote controller handling required by compact disc players without requiring a separate microcontroller. it provides the following basic functions: demodulation of the efm signal from the optical pickup, deinterleaving, error detection and correction, 8 oversampling audio filters, d/a converter (with built-in analog low-pass filter), led display drivers, key acquisition (a/d) and control processing, and automatic discrimination and playback of cd-rw discs. thus the LC78604E is ideal for implementing low-end cd players that support playback of cd-rw discs. the LC78604E also provides a radio tuner frequency display function, and allows digital display of the selected frequency in manual tuning cd radio/cassette players. functions ? implements the cd play/pause, stop, track selection, fast forward/fast rewind, repeat 1/repeat all, program setup/play/clear for up to 30 tracks, and shuffle play functions controlled from cd player buttons. ? the signal-processing block applies slicing at the correct level to the input hf signal, and converts that signal to an efm signal. at the same time it generates a pll clock signal with an average frequency of 4.3218mhz by comparing the phase with that of the internal vco. ? a reference clock signal and all necessary timings can be generated using an external 16.9344mhz crystal. ? the disc motor speed is controlled by a frame phase difference signal created from the playback clock and the reference clock. ? performs frame sync signal detection, protection, and interpolation to assure stable data readout. ? demodulates the efm signal and converts the result to 8-bit symbol data. ? separates the subcode data from the efm signal and outputs that data to the internal control processing block. ? after applying a crc check to the subcode q data, outputs that data to the internal control processing block. ? buffers the demodulated efm signal in internal ram and compensates for up to 4 frames of jitter due to fluctuations in the disc speed. ? applies unscrambling and deinterleaving to the demodulated efm signal in the stipulated order. ? performs error detection, correction, and flag processing (c1: double, c2: double). ? sets the c2 flags according to the c1 flags and the c2 check and applies interpolation and previous value hold processing to the output signal according to the c2 flags. this interpolation circuit implements 2-value interpolation. a previous value hold operation is applied if the c2 flags indicate errors for over 2 consecutive samples. ? the internal control processing block controls the track jump, focus start, disc motor start/stop, muting on/off, track count, and other operations. sanyo semiconductors data sheet LC78604E cmos ic compact disc player dsp with built-in microcontroller any and all sanyo products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. consult with your sanyo representative nearest you before using any sanyo products described or contained herein in such applications. sanyo assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all sanyo products described or contained herein.
no.7734- 2 /11 LC78604E ? uses 8 oversampling digital filters to produce output data with improved continuity for the d/a converter. ? built-in third-order noise shaper ? d/a converter and built-in analog low-pass filters ? digital deemphasis function ? zero cross muting ? automatic discrimination and playback of cd-rw discs ? built-in led display driver supports 7-segment 3-digit plus symbol displays ? monitor display for the play, program, repeat, random, and tuner functions ? a/d based key acquisition for play/pause, stop, forward scan, backward scan, repeat, program, and random functions. features ? 64-pin qip ? supply voltage: 3.3v single source specifications absolute maximum ratings at ta=25 c, v ss =0v parameter symbol conditions ratings unit maximum supply voltage v dd max v ss C 0.3 to v ss + 4.0 v input voltage v in v ss C 0.3 to v dd + 0.3 v output voltage v out v ss C 0.3 to v dd + 0.3 v allowable power dissipation pdmax 300 mw operating temperature topr C20 to +75 c storage temperature tstg C40 to +125 c parameter symbol pin name conditions ratings unit min typ max supply voltage v dd dv dd , xv dd , lrv dd , av dd 3.0 3.6 v v ih (1) drf, defi 0.7v dd v dd v hfl, tes, fmamb, remote, input high-level voltage v ih (2) puin, close, cdresb, 0.8v dd v dd v tuneresb, moni1 to 3 v ih (3) efmi 0.6v dd v dd v v il (1) drf, defi 0 0.3v dd v hfl, tes, mode, fmamb, input low-level voltage v il (2) remote, puin, close, 0 0.2v dd v cdresb, tuneresb, moni1 to 3 v il (3) efmin 0 0.4v dd v v in (1) efmin slice level control 0.66 vp-p v in (2) xin16m, xin32k capacitor coupled 1.0 vp-p input level input input amplitude applied to the * conditions 1 v in (3) coupling capacitor connected to * conditions 2 0.05 vrms the tunerin pin fop efmin 10 mhz operating frequency range fam tunerin fmamb=l 0.5 5 mhz ffm tunerin fmamb=h 50 120 mhz crystal oscillator frequency fx16 xin16m, xout16m 16.9344 mhz crystal oscillator frequency fx32 xin32k, xout32k 32.768 khz allowable operating ranges at ta=C20 to +75 c, v dd =3.0v to 3.6v, v ss =0v * conditions 1: the coupling capacitor must be located as close as possible to the tunerin pin. * conditions 2: coupling capacitor: 100pf 20 pf
no.7734- 3 /11 LC78604E parameter symbol pin name conditions ratings unit min typ max current drain i dd dv dd , xv dd , lrv dd , av dd 20 30 ma drf, defi, hfl, tes, fmamb, i ih (1) remote, puin, close, v in =v dd 5 a input high-level current cdresb, tunersb, efmin, tunerin i ih (2) moni1 to 3 v in =v dd 100 a drf, defi, hfl, tes, fmamb, i il (1) remote, cdresb, tunersb, v in =0v C5 a input low-level current moni1 to 3, mode, efmin, tunerin i il (2) puin, close v in =0v C100 a clk, rwb, rwc, coin, cqckb, v oh (1) fseq, toff, tgl, amuteb, i oh =C1.5ma v dd C0.4 v output high-level voltage dmuteb, clvo, jpo, sl+, slC, moni1 to 3 v oh (2) seg1 to seg7 i oh =C6ma v dd C0.5 v v oh (3) dig1 to dig4 i oh =C12ma v dd C0.5 v clk, rwb, rwc, coin, cqckb, v ol (1) fseq, toff, tgl, amuteb, i ol =1.5ma 0.4 v output low-level voltage dmuteb, clvo, jpo, sl+, slC, moni1 to 3 v ol (2) seg1 to seg7 i ol =6ma 0.5 v v ol (3) dig1 to dig4 i ol =12ma 0.5 v output off leakage current ioff pdo, clvo, jpo in the high-impedance C5 +5 a output state pull-up resistance rpu puin, close 80 k pull-down resistance rdw moni1 to 3 80 k charge pump output current ipdoh pdo iset=100k 80 100 120 a ipdol pdo C120 C100 C80 a electrical characteristics at ta=C20 to +75 c, v dd =3.0v to 3.6v, v ss =0v 14.0 17.2 14.0 17.2 0.15 0.35 0.8 (2.7) 3.0max 0.1 0.8 (1.0) 1 16 17 32 33 48 49 64 package dimensions unit : mm 3159a sanyo : qip64e (14 14)
no.7734- 4 /11 LC78604E parameter symbol pin name conditions ratings unit min typ max with a 1khz, 0db signal input total harmonic distortion thd+n lcho, rcho with the 20khz low-pass filter 0.025 0.04 % (built into the ad725d) used with a 1khz, C60db signal input dynamic range dr lcho, rcho with the 20khz low-pass and a 85 87 db filters (built into the ad725d) used with a 1khz, 0db signal input signal-to-noise ratio s/n lcho, rcho with the 20khz low-pass and a 88 90 db filters (built into the ad725d) used with a 1khz, 0db signal input crosstalk ct lcho, rcho with the 20khz low-pass filter 80 82 db (built into the ad725d) used 1-bit d/a converter block analog characteristics at ta=25 c, v dd =3.3v, v ss =0v 1-bit d/a converter output block reference circuit * : measured in normal playback mode in the sanyo 1-bit d/a converter reference circuit. lc78604 oscillator element: 16.9344mhz the following oscillator elements are recommended : cstls16m9x53-b0 (built-in capacitor) (murata mfg. co., ltd.) cstce16m9v53-r0 (built-in capacitor) (murata mfg. co., ltd.) c 1500pf 2.2k 4.7 f 100k lrvdd lcho(rcho) lrvss c oscillator element x tal shibasoku co., ltd. ad725d lpf analog output lch (rch) xin xout
no.7734- 5 /11 LC78604E pin assignment slco avdd fr iset pdo avss ad3 ad2 ad1 cdresb tuneresb moni1 moni2 moni3 tunerin dvdd 1 2 3 4 5 6 7 8 9 10 11 LC78604E 12 13 14 15 16 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 3 32 3 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 dvss puin close remote fmamb seg7 seg6 seg5 seg4 seg3 seg2 seg1 dig1 dig2 dig3 dig4 efmi drf defi clk rwb rwc coin cqckb fseq clvo hfl jpo tes toff tgl dvss dvdd sl+ sl dmuteb amuteb mode lcho lrvdd lrvss rcho xvss xout16m xin16m xvdd xout32k xin32k top view
no.7734- 6 /11 LC78604E equivalent block diagram dvdd dvdd dvss dvss xvdd xvss avdd avss lrvdd lrvss commander ram 2k 8bits interpolation mute c1, c2 error detection & correction flag processing 8x over sampling digital filter lpf synchronization detection efm demodulation clv digital servo subcode separator q, crc led controller & driver a/d port i/f vco clock control slice level control control 1bit dac clock generator tuner counter cdresb tuneresb xin16m xout16m xin32k xout32k mode lcho rcho dig1 dig2 dig3 dig4 seg1 seg2 seg3 seg4 seg5 seg6 seg7 tunerin fseq iset fr pdo defi efmi slco clvo hfl tes rwb toff tgl jpo drf ad1 ad2 ad3 sl+ sl moni1 moni2 moni3 cl k coin cqckb rwc fmamb amuteb dmuteb puin close remote
no.7734- 7 /11 LC78604E pin no. pin name i/o function pin state when pin state when cdresb is low tuneresb is low 1 efmi i efm signal input 2 drf i drf signal input 3 defi i defect detection signal (def) input (must be connected to ground if unused.) 4 clk o asp system clock output (132.3khz [16.9344mhz/128]) clock output undefined rw support control signal 5 rwb o low-level output: indicates that a cd-rw disc is being played low-level output undefined high-level output: indicates that a cd-da/r disc is being played 6 rwc o command write control signal output low-level output undefined 7 coin o command data signal output high-level output undefined 8 cqckb o command data transfer clock signal output high-level output undefined sync signal detection output monitor 9 fseq o a high level is output when the sync signal detected from the efm signal low-level output undefined matches the internally generated sync signal. spindle motor control signal output 10 clvo o low-level output: decelerate high-impedance undefined high-level output: accelerate output high-impedance output: neither accelerate nor decelerate 11 hfl i track detection signal input (schmitt trigger input) track jump control signal output low-level output: when moving away from the center: decelerate 12 jpo o when moving towards the center: accelerate high-impedance undefined high-level output: when moving away from the center: accelerate output when moving towards the center: decelerate high-impedance output: neither accelerate nor decelerate 13 tes i tracking error signal input (schmitt trigger input) tracking off signal output high-impedance 14 toff o low-level output: tracking on output undefined high-level output: tracking off 15 tgl o tracking gain switching signal output undefined undefined low-level output: gain increase 16 dvss digital system ground. this pin must be connected to the 0v level. 17 dvdd digital system power supply 18 sl+ o sled feed signal outputs low-level output undefined 19 slC o low-level output undefined 20 dmuteb o driver muting control signal output low-level output undefined low-level output: when the driver is muted 21 amuteb o audio muting control signal output low-level output undefined low in audio mute mode 22 mode i operating mode selection this pin must be connected to the 0v level. 23 lcho o d/a converter left channel signal output undefined undefined 24 lrvdd d/a converter power supply 25 lrvss d/a converter ground. this pin must be connected to the 0v level. 26 rcho o d/a converter right channel signal output undefined undefined 27 xvss digital system ground. this pin must be connected to the 0v level. 28 xout16m o connections for a 16.9344mhz crystal oscillator element. clock output undefined 29 xin16m i (oscillation is stopped when tuneresp is high.) 30 xvdd digital system power supply 31 xout32k o connections for a 32.768khz crystal oscillator element. undefined clock output 32 xin32k i (oscillation is stopped when cdresb is high.) 33 dig4 o digital output (4) high-level output high-level output 34 dig3 o digital output (3) high-level output high-level output 35 dig2 o digital output (2) high-level output high-level output 36 dig1 o digital output (1) high-level output high-level output 37 seg1 o segment output (1) high-level output high-level output 38 seg2 o segment output (2) high-level output high-level output 39 seg3 o segment output (3) high-level output high-level output 40 seg4 o segment output (4) high-level output high-level output 41 seg5 o segment output (5) high-level output high-level output 42 seg6 o segment output (6) high-level output high-level output 43 seg7 o segment output (7) high-level output high-level output pin functions continued on next page.
no.7734- 8 /11 LC78604E continued from preceding page. pin no. pin name i/o function pin state when pin state when cdresb is low tuneresb is low 44 fmamb i tuner display switching selection input (schmitt trigger input) 45 remote i remote control signal input (schmitt trigger input) 46 close i close switch detection signal input. a pull-up resistor is built in. (schmitt trigger input) 47 puin i limit switch detection signal input. a pull-up resistor is built in. (schmitt trigger input) 48 dvss digital system ground. this pin must be connected to the 0 v level. 49 dvdd digital system 3.3v power supply 50 tunerin i tuner frequency display input 51 moni3 i/o internal signal monitor pin 3. (schmitt trigger input) (low-level output) undefined a pull-down resistor is built in. (default: input mode) 52 moni2 i/o internal signal monitor pin 2. (schmitt trigger input) (low-level output) undefined a pull-down resistor is built in. (default: input mode) 53 moni1 i/o internal signal monitor pin 1. (schmitt trigger input) (low-level output) undefined a pull-down resistor is built in. (default: input mode) reset input for this ics tuner display block. 54 tuneresb i a pull-down resistor is built in. this pin must be set low briefly after power is first applied. reset input for this ics cd playback block. 55 cdresb i a pull-down resistor is built in. this pin must be set low briefly after power is first applied. 56 ad1 ai key operation a/d converter input 1 57 ad2 ai key operation a/d converter input 2 58 ad3 ai key operation a/d converter input 3 59 avss analog system ground. this pin must be connected to the 0v level. 60 pdo ao external vco control phase comparator output undefined undefined 61 iset ai pdo output current adjustment resistor connection pll system pins vco frequency range adjustment 62 fr ai an external resistor must be connected between this pin and avdd. 63 avdd analog system power supply 64 slco ao slice level control output undefined undefined
no.7734- 9 /11 LC78604E sample application circuit slco avdd fr iset pdo avss ad3 ad2 ad1 cdresb tuneresb mo ni1 mo ni2 mo ni3 tunerin dvdd efmi drf defi clk rwb rwc coin cqckb fseq clvo hfl jp o tes toff tgl dvss 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 dvss puin close remote fmamb seg7 seg6 seg5 seg4 seg3 seg2 seg1 dig1 dig2 dig3 dig4 xin32k dvdd sl+ sl dmuteb amuteb mo de lcho lrvdd lrvss rcho xvss xout16m xin16m xvdd xout32k to asp-lsi (lv1605) rch audio vdd lch to driver-lsi (la6548) gnd v dd to led display to tuner audio gnd to mechanism to function v dd LC78604E
no.7734- 10 /11 LC78604E notes on application design while it goes without saying that this ics absolute maximum ratings and allowable operating ranges (and recommended operating conditions) must be strictly observed to achieve reliability as a total system, adequate care is also required with respect to the operating environment and mounting conditions such as ambient temperature and static electricity. this section presents notes on items that require care during end product design and ic mounting. ? handling unused pins if any unused input pins on this ic are left open the related internal circuits may become unstable. the instructions on handling unused pins for specific pins given in the technical documentation must be followed. also note that unused output pins must not be shorted to power, ground, or other outputs. ? latchup prevention the stipulated supply voltage must be applied to each power supply pin. if there are multiple pins for which the same supply voltage is stipulated, the same potential must be applied to all those pins. overvoltages and abnormal noise must not be applied to this ic. in general, latchup can be prevented by holding unused input pins fixed at either v dd or v ss . however, the handling of each pin must follow the specific instruction in the pin functions documentation. the outputs must not be shorted. ? interface notes when the inputs and outputs of different devices are connected, malfunctions may occur if the input v il /v ih levels do not match the corresponding output v ol /v oh levels. level shifters must be inserted to prevent destruction of the devices if devices with differing supply voltages, such as may occur in two power supply system applications, are connected. ? load capacitance and output current when connected to high capacitance loads, lines may be melted since the effect of such loads is the same as the load being shorted for an extended period. also, charge/discharge currents may result in noise that may degrade equipment performance and cause malfunctions. the recommended load capacitance ratings must be observed. excessive output sink or source currents can cause similar problems. observe the maximum allowable power dissipation ratings and use this ic within the recommended current value range. ? notes on power application and power-on reset there are cases where special care is required at power on, during a reset, and after a reset is cleared. refer to the device specifications and design applications taking these concerns into account. this ics output pin states, i/o settings, and register values are undefined when power is first applied. the operation of items that are defined by a reset operation or mode settings is only guaranteed after the corresponding reset or setting operation. a reset must be applied to this ic after power is first applied. the states immediately after power on of pins and registers that are not explicitly defined cannot be relied on: they may differ from versions of the same product purchased at different times. ? notes on thermal design the failure rate of semiconductor devices is accelerated greatly by increases in ambient temperature or power consumption. to assure high reliability, design the application heat dissipation system to provide adequate margin for variations in ambient conditions. ? notes on pcb pattern design ideally, there should be separate power supply and ground lines for each system to reduce the influence of shared impedances. the power supply and ground lines should be as wide and as short as possible, and the impedance to high frequencies should be as small as possible. ideally, decoupling capacitors (0.01 to 1 f) and 100 to 220 f capacitors should be inserted between each power supply/ground pair. however, note that latchup may occur if the values of these capacitors are too large. *: in the servo systems, the same handling is required for the v ref reference voltage line as well as for the driver v cc and ground lines. the driver ground lines must be especially wide and located under the device to provide a heat dissipating effect.
ps no.7734- 11 /11 LC78604E s p e c i f i c a t i o n s o f a n y a n d a l l s a n y o p r o d u c t s d e s c r i b e d o r c o n t a i n e d h e r e i n s t i p u l a t e t h e p e r f o r m a n c e , c h a r a c t e r i s t i c s , a n d f u n c t i o n s o f t h e d e s c r i b e d p r o d u c t s i n t h e i n d e p e n d e n t s t a t e , a n d a r e n o t g u a r a n t e e s o f t h e p e r f o r m a n c e , c h a r a c t e r i s t i c s , a n d f u n c t i o n s o f t h e d e s c r i b e d p r o d u c t s a s m o u n t e d i n t h e c u s t o m e r ' s p r o d u c t s o r e q u i p m e n t . t o v e r i f y s y m p t o m s a n d s t a t e s t h a t c a n n o t b e e v a l u a t e d i n a n i n d e p e n d e n t d e v i c e , t h e c u s t o m e r s h o u l d a l w a y s e v a l u a t e a n d t e s t d e v i c e s m o u n t e d i n t h e c u s t o m e r ' s p r o d u c t s o r e q u i p m e n t . s a n y o e l e c t r i c c o . , l t d . s t r i v e s t o s u p p l y h i g h - q u a l i t y h i g h - r e l i a b i l i t y p r o d u c t s . h o w e v e r , a n y a n d a l l s e m i c o n d u c t o r p r o d u c t s f a i l w i t h s o m e p r o b a b i l i t y . i t i s p o s s i b l e t h a t t h e s e p r o b a b i l i s t i c f a i l u r e s c o u l d g i v e r i s e t o a c c i d e n t s o r e v e n t s t h a t c o u l d e n d a n g e r h u m a n l i v e s , t h a t c o u l d g i v e r i s e t o s m o k e o r f i r e , o r t h a t c o u l d c a u s e d a m a g e t o o t h e r p r o p e r t y . w h e n d e s i g n i n g e q u i p m e n t , a d o p t s a f e t y m e a s u r e s s o t h a t t h e s e k i n d s o f a c c i d e n t s o r e v e n t s c a n n o t o c c u r . s u c h m e a s u r e s i n c l u d e b u t a r e n o t l i m i t e d t o p r o t e c t i v e c i r c u i t s a n d e r r o r p r e v e n t i o n c i r c u i t s f o r s a f e d e s i g n , r e d u n d a n t d e s i g n , a n d s t r u c t u r a l d e s i g n . i n t h e e v e n t t h a t a n y o r a l l s a n y o p r o d u c t s ( i n c l u d i n g t e c h n i c a l d a t a , s e r v i c e s ) d e s c r i b e d o r c o n t a i n e d h e r e i n a r e c o n t r o l l e d u n d e r a n y o f a p p l i c a b l e l o c a l e x p o r t c o n t r o l l a w s a n d r e g u l a t i o n s , s u c h p r o d u c t s m u s t n o t b e e x p o r t e d w i t h o u t o b t a i n i n g t h e e x p o r t l i c e n s e f r o m t h e a u t h o r i t i e s c o n c e r n e d i n a c c o r d a n c e w i t h t h e a b o v e l a w . n o p a r t o f t h i s p u b l i c a t i o n m a y b e r e p r o d u c e d o r t r a n s m i t t e d i n a n y f o r m o r b y a n y m e a n s , e l e c t r o n i c o r m e c h a n i c a l , i n c l u d i n g p h o t o c o p y i n g a n d r e c o r d i n g , o r a n y i n f o r m a t i o n s t o r a g e o r r e t r i e v a l s y s t e m , o r o t h e r w i s e , w i t h o u t t h e p r i o r w r i t t e n p e r m i s s i o n o f s a n y o e l e c t r i c c o . , l t d . a n y a n d a l l i n f o r m a t i o n d e s c r i b e d o r c o n t a i n e d h e r e i n a r e s u b j e c t t o c h a n g e w i t h o u t n o t i c e d u e t o p r o d u c t / t e c h n o l o g y i m p r o v e m e n t , e t c . w h e n d e s i g n i n g e q u i p m e n t , r e f e r t o t h e " d e l i v e r y s p e c i f i c a t i o n " f o r t h e s a n y o p r o d u c t t h a t y o u i n t e n d t o u s e . i n f o r m a t i o n ( i n c l u d i n g c i r c u i t d i a g r a m s a n d c i r c u i t p a r a m e t e r s ) h e r e i n i s f o r e x a m p l e o n l y ; i t i s n o t g u a r a n t e e d f o r v o l u m e p r o d u c t i o n . s a n y o b e l i e v e s i n f o r m a t i o n h e r e i n i s a c c u r a t e a n d r e l i a b l e , b u t n o g u a r a n t e e s a r e m a d e o r i m p l i e d r e g a r d i n g i t s u s e o r a n y i n f r i n g e m e n t s o f i n t e l l e c t u a l p r o p e r t y r i g h t s o r o t h e r r i g h t s o f t h i r d p a r t i e s . this catalog provides information as of march, 2004. specifications and information herein are subject to change without notice. *: if a current output type pickup is used, the photoreceptor connector must be located as close as possible to the asp rf input. if a voltage output type pickup is used, the i/v conversion resistors located at the asp input must be located as close as possible to the asp rf input. the efm signal line must be made as short as possible, and must either be located well away from adjacent lines or must be run between ground or power supply level lines as shield lines. since the slice level controller output (slco) can easily introduce noise in the efm signal line, the resistor connected to the output pin must be located as close to that pin as possible. note that if that resistor has a relatively small value, spurious radiation problems may be aggravated and that if the resistor has a larger value, the output level may become problematic. the crystal oscillator circuit must be surrounded by the ground pattern. the tuner pin coupling capacitor must be located as close to the ic as possible. ? other notes if there are any points that are unclear or if you have any questions, contact your sanyo representative during the design phase. this ic is a special-purpose device designed for cd player applications, and has specifications that differ from those of general-purpose logic devices. end products must be designed to operate in a failsafe manner appropriate for the application, and application operation must be verified using test equipment.

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