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d a t a sh eet preliminary speci?cation supersedes data of 1995 mar 08 file under integrated circuits, ic02 1996 mar 11 integrated circuits tda8745 satellite sound receiver with i 2 c-bus control
1996 mar 11 2 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 features on-chip frequency synthesizer and mixer: C tuning range 4 to 9.77 mhz C reference oscillator 4 mhz (using a crystal or 4 mhz frequency source) if input switches allowing selection of various if bandwidths (wide or narrow) demodulation of two audio signals by wide band phase-locked loops (plls) audio level control after pll (modulation depth setting) noise reduction (nr) bypass for use with main audio signals left, right and mono output [ 1 2 (l + r)] on scart level external audio inputs (for decoder connection) selectable de-emphasis (deem) 50 m s, 75 m s, j17 and flat response i 2 c-bus control of all functions two selectable addresses carrier presence detector with automatic mute option. applications satellite receivers tv sets video recorders. general description the tda8745 is the successor of the tda8740 and tda8741. the device contains the functionality of the tda8740 and tda8741 together with a synthesizer, mixer and i 2 c-bus control. the pin numbers mentioned in this publication refer to the sdip42 package; unless otherwise indicated. ordering information type number package name description version tda8745 sdip42 plastic shrink dual in-line package; 42 leads (600 mil) sot270-1 tda8745h qfp44 plastic quad ?at package; 44 leads (lead length 1.3 mm); body 10 10 1.75 mm sot307-2
1996 mar 11 3 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 quick reference data symbol parameter conditions min. typ. max. unit v p1 synthesizer and mixer supply voltage 4.5 5.0 5.5 v v p2 i 2 c-bus supply voltage 4.5 5.0 5.5 v v p3 general supply voltage 8.0 12.0 13.2 v i p1 synthesizer and mixer supply current - 37 48 ma i p2 i 2 c-bus supply current - 0.6 - ma i p3 general supply current - 35 46 ma s/n(a) signal-to-noise ratio secondary channel a-weighted; nr = on; deem = 75 m s 68 77 - db v i(rms) input sensitivity (rms value) baseband input to mixer s/n(a) = 40 db; nr = on; deem = 75 m s - 0.5 1.5 mv v i(rms) baseband input voltage (rms value) thd 0.5% 200 mv v o output voltage - 8 - 6 - 4 dbv p tot total power dissipation - 610 800 mw t stg storage temperature - 65 - +150 c t amb operating ambient temperature - 20 - +70 c
1996 mar 11 4 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 block diagram handbook, full pagewidth j mbe037 330 w 330 w 330 w 330 w 330 w 1 k w 470 k w 1 m f hf limiter pll hf limiter pll il2 to il0 ir2 to ir0 presence detector audio lpf noise reduction omr 12 to 3db lev3 to lev0 oml presence detector bb dc dc pdr il2 ir2 pres det r c dc r rect r c nr d r c d r deem out l deem out r c att/rec r pdl 9 pe 11 13 15 7 8 10.7 narrow 5 330 w 10 nf 10 m f de-emphasis 50 m s j17 10 m f 1 m f 4.7 nf 10 nf 75 m s 220 nf audio lpf noise reduction de-emphasis 50 flat flat m s j17 75 m s dem1 and dem0 os1 and os0 nr oml omr o l o m o r 23 21 22 29 30 31 24 27 26 28 39 1 35 34 33 25 37 38 36 ext l c d l c cl l c cl l c nr d l c dc l v ref v p3 v p2 v p1 afgnd hfgnd pres det l c att/rec l rect l ext 470 k w 1 m f 12 to 3db 10 m f 42 41 10 m f 1 m f 4.7 nf 10 nf 220 nf 20 32 10 2.2 m f 19 v ref 16 14 17 18 12 2 pdl pdr i c interface 2 vco frequency synthesizer 30 to 40 mhz n 2 charge pump 200 crystal oscillator pre-bpf 4 mhz mixer bpfn tun9 to tun0 sda 5 v scl add sel i cgnd 4 6 syngnd xtal 2 40 baseband in if out 6.8 k w 33 nf 3 27 pf 27 pf 27 pf 15 pf 1 m f 1000 m f 10 pf 4 mhz 10.52 narrow 10.7 wide slf in-1 in-2 in-3 in-4 in-5 in-6 r tda8745 (2) (1) (2) (2) 47 m h 100 m h 4.7 w 22 nf 12 v 100 m f 22 nf 5 v 22 nf fig.1 block diagram (sdip42). when driving more than three filters in parallel, pin 5 should be buffered. (1) add 15 pf for ntsc. (2) ceramic filters: sfe10.7mja10-a (narrow) sfe10.52mja10-a (narrow) sfe10.7ms2-a (wide).
1996 mar 11 5 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 pinning symbol pin description sdip42 qfp44 c dc r 1 39 dc decoupling capacitor (right channel) slf 2 41 synthesizer loop-?lter baseband in 3 42 baseband input to mixer v p1 4 43 synthesizer and mixer supply voltage (+5 v) if out 5 44 intercarrier output from mixer syngnd 6 1 synthesizer and mixer ground in-5 7 2 intercarrier input 5/port expansion output 1 in-6 8 3 intercarrier input 6/port expansion output 2 in-1 9 4 intercarrier input 1 hfgnd 10 5 hf ground in-2 11 6 intercarrier input 2 add sel 12 7 i 2 c-bus address selection in-3 13 8 intercarrier input 3 i 2 cgnd 14 9 i 2 c-bus ground in-4 15 10 intercarrier input 4 v p2 16 11 i 2 c-bus supply voltage (+5 v) scl 17 12 i 2 c-bus serial clock input sda 18 13 i 2 c-bus serial data input/output v ref 19 14 decoupling capacitor for reference voltage v p3 20 15 general supply voltage (+12 v) o m 21 17 mono channel output [ 1 2 (l + r)] o r 22 18 right channel output o l 23 19 left channel output ext r 24 20 external audio input (right channel) ext l 25 21 external audio input (left channel) c att/rec r 26 22 attack/recovery capacitor (right channel) rect r 27 23 recti?er dc decoupling (right channel) c nr d r 28 24 noise reduction de-emphasis capacitor (right channel) c dr 29 25 de-emphasis capacitor (right channel) deem out r 30 26 de-emphasis output (right channel) c cl r 31 27 audio pass-through input (right channel) afgnd 32 28 af ground c cl l 33 29 audio pass-through input (left channel) deem out l 34 30 de-emphasis output (left channel) c dl 35 31 de-emphasis capacitor (left channel) c nr d l 36 32 noise reduction de-emphasis capacitor (left channel) rect l 37 33 recti?er dc decoupling (left channel) c att/rec l 38 34 attack/recovery capacitor (left channel)
1996 mar 11 6 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 pres det r 39 35 presence detector timing (right channel) xtal 40 36 crystal input for 4 mhz oscillator pres det l 41 37 presence detector timing (left channel) c dc l 42 38 dc decoupling capacitor (left channel) n.c. - 16 not connected n.c. - 40 not connected symbol pin description sdip42 qfp44 handbook, halfpage 1 2 3 4 5 6 7 8 9 10 11 12 13 40 39 38 37 36 35 34 33 32 31 30 29 28 27 14 15 16 17 18 19 20 22 23 24 25 26 21 42 41 o o ext ext att/rec r deem out r afgnd rect pres det r xtal dc l dc r att/rec l pres det l slf baseband in if out syngnd in-5 in-6 in-1 hfgnd in-2 add in-3 i cgnd in-4 scl sda v p3 v p2 v p1 v m o deem out l rect tda8745 2 ref mbe035 c c l c nr d l c d l c cl l c cl r c d r c c nr d r r l r l r sel c fig.2 pin configuration (sdip42).
1996 mar 11 7 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 fig.3 pin configuration (qfp44). handbook, full pagewidth 1 2 3 4 5 6 7 8 9 10 11 33 32 31 30 29 28 27 26 25 24 23 12 13 14 15 16 17 18 19 20 21 22 44 43 42 41 40 39 38 37 36 35 34 rect nr d l deem out l afgnd deem out r c c rect if out v baseband in slf n.c. dc l c dc r p1 c xtal pres det r pres det l att/rec l c tda8745h syngnd in-5 in-6 in-1 hfgnd in-2 add in-3 in-4 v 2 i cgnd scl sda v o m o r o r c l n.c. ext l ext att/rec r ref v p3 mbe034 l c cl l c cl r d r r nr d r c d l c sel p2
1996 mar 11 8 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 functional description satellite sound the baseband signal coming from a satellite tuner comprises the demodulated video signal plus a number of sound carriers in the event of reception of a pal, ntsc or secam satellite signal. nearest to the video signal is the main sound carrier which carries the mono sound related to the video. this is an fm modulated carrier with a fixed pre-emphasis. the carrier frequency can be in the range of 5.8 to 6.8 mhz. additionally, a number of optional secondary sound carriers may be present. these can be used for stereo or multi-language sound related to the video signal, or for unrelated radio sound. these carriers are also fm modulated, and for better sound quality (improved signal-to-noise performance) broadcast satellites (e.g. astra) use a noise reduction system (adaptive pre-emphasis circuit, combined with a fixed pre-emphasis). these secondary carrier frequencies can be in the range of 6.30 to 8.28 mhz. for accurate tuning to the many sound carriers, an internal frequency synthesizer and mixer are used to transfer the sound carriers to intermediate frequencies of 10.7 and 10.52 mhz. the tda8745 contains all circuitry for the processing of the main channel and secondary channels, from baseband signal to line (scart) output drivers. by means of external band-pass filters the desired frequencies coming from the synthesizer/mixer are routed to the if limiter/demodulator inputs. band-pass ?lter and mixer before the incoming baseband signal is applied to the mixer, the signal is filtered. related to the sound carriers, the level of the video part of the baseband signal can be much higher, so to avoid overload it is desirable to attenuate the latter, this is also to avoid interference (additional unwanted mix of signals after mixing). the internal band-pass filter (pass band from approximately 4 to 10 mhz) is completed by a simple external notch filter. the external filter provides substantial attenuation of the video colour carrier. the notch filter is chosen to be external because the required notch frequency is tv standard dependent and also because an accurate on-chip notch filter requires a tuning mechanism (consuming additional chip area). the mixer is a double-balanced mixer with degeneration, this to accommodate the level of the filter output signal. the mixer transfers the different sound carrier frequencies to fixed intermediate frequencies of 10.7 and 10.52 mhz. these frequencies are fed via an internal buffer stage to external ceramic band-pass filters before they are routed to the two demodulator inputs. the buffer stage can drive up to three external ceramic band-pass filters (assuming 330 w filter terminations) but this can be increased to four or more by adding an external buffer. synthesizer the synthesizer consists of the following parts: reference oscillator reference divider a 10-bit programmable divider phase detector charge pump voltage controlled oscillator (vco) divide-by-two circuit. the reference frequency circuit consists of a 4 mhz crystal oscillator and a divider (by 200). the resulting reference frequency of 20 khz is fed to the phase detector. the programmable divider consists of a series of cells (divide by 2 or 3) connected as a ripple counter. the minimum division ratio is 2 n and the maximum division ratio is 2 n+1 - 1. the programmable divider output signal is also fed to the phase detector. the charge pump provides output current pulses in accordance with the signals from the phase detector. the final tuning voltage for the vco is provided by the loop filter and a buffer amplifier. the oscillator frequency range is from 29.04 to 40.94 mhz, depending on the setting of the programmable divider (by the tun signal). the tuning voltage is clipped to limit the vco frequency range. the frequency of the oscillator is divided-by-two before it is applied to the mixer (to obtain the desired 10 khz resolution). left and right channel inputs a maximum of six inputs are available (pins 9, 11, 13, 15, 7 and 8). external ceramic band-pass filters, which are tuned to the desired intermediate frequencies, route the signals to the inputs. for stereo purposes the tda8745 contains two identical secondary sound processing channels (secondary channel 1 will also be referred to as left or language 1 and secondary channel 2 as right or language 2).
1996 mar 11 9 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 with the input selection every input pin of the left and/or right channel can be independently selected. input selection for the left channel is controlled by the il signal and for the right channel by the ir signal. from the inputs, the signals are coupled to the limiter/amplifier and to the pll demodulator of each channel. the output signal from the pll is routed to both the presence detector and audio level control. the inputs of pins 7 and 8 can be changed into digital outputs for external switching purposes, set by the so called port extension bit (pe). not used inputs should be connected to ground. note that the inputs of pins 7 and 8 are also floating when not in port extension mode. presence detector the presence detector is used to determine if a carrier is present on the channel of interest. it does so by measuring the amount of high frequency noise (>20 khz) in the audio signal, which is directly related to the c/n (carrier-to-noise ratio) at the if input. if a carrier is present, these high frequencies are fairly moderate, if no carrier is present, strong noise components are present. the audio signal, first high-pass filtered and then rectified, is filtered by the components at pins 41 and 39 (pres det l and pres det r). the dc level at this pin is then compared with an internal reference voltage. if the level at pins 41 and 39 exceeds this voltage level, the presence detector output goes high (no carrier). this output signal can be used to drive the output mute (if bit pdm = 1; see section output selection) and can be monitored by reading bits pdl and pdr. the detection level can be modified by changing the leakage resistor at pins 41 and 39, a higher resistor value gives a no carrier response ant c/n levels detected as carrier present with a lower resistor value. audio level control each demodulator output signal is amplified in a buffer amplifier and dc decoupled by means of electrolytic capacitors connected to pin 42 (left) and pin 1 (right). the output level of all channels is - 6 dbv typical at a frequency deviation of the fm signal of 54% of the maximum deviation (i.e 0.54 85 khz = 46 khz for the main channel and 0.54 50 khz = 27 khz for the secondary channels) at 1 khz modulation frequency (reference level). to adjust for different (main channel) modulation depths used at some satellites the audio level is made adjustable, the signal can be controlled in steps of 1 db from - 12 db to +3 db by the lev signal. noise reduction (nr) to improve the quality of the secondary channels, the audio signal is processed at the transmitter side before modulation. for an overall flat audio response the inverse processing must take place after demodulation. this is achieved in the nr. the nr can be regarded as an input level dependent low-pass filter (lpf) [adaptive de-emphasis system] followed by a fixed de-emphasis. figure 3 shows the transfer characteristics as function of the input level (normalized to input level, and without the fixed de-emphasis). at maximum input level (50 khz frequency deviation, referred to as 0 db) the frequency response of the first part (i.e. without fixed de-emphasis) is nearly flat (note the small dip around 3 khz in fig.3; this is a system attribute). as the input level is x db lowered, the higher output frequencies will be reduced an extra x db with respect to the lower frequencies (1 : 2 expansion). if a main carrier signal is received, the nr can be bypassed at which the signal is fed directly to the de-emphasis circuit. the noise reduction is active when the nr signal (via i 2 c-bus) is logic 1. de-emphasis de-emphasis is realized by means of several internal resistors and an external capacitor to ground. via the i 2 c-bus, the dem signal can be switched between 50 m s, 75 m s, j17 and no de-emphasis. figure 4 shows these four different possibilities. output selection with the output selector the output pins 23 and 22 can be switched to the left and right satellite channels (pins 33 and 31) or to the external inputs (pins 25 and 24) for an other signal source or for connection of a decoder box. the os1 and os0 bits determine this selection. pin 21 is a separate output which delivers the mono channel. the mono signal is the sum of pin 23 (left) and pin 22 (right) output signal [ 1 2 (l + r)].
1996 mar 11 10 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 output pins 23 and 22 can be muted by setting the oml and omr signals to logic 1. in addition, automatic muting is also possible, the presence detector (as described in section presence detector) sets the pdl bit (pdr for other channel). absence of a carrier at the selected frequency results in automatic muting. this mechanism is enabled or inhibited by the pdm bit (presence detector auto mute). all outputs (pins 21, 22 and 23) are line drivers with scart level capability and are short-circuit protected by means of 125 w output resistors. pins 34 and 30 are also line drivers at scart level and can be used as signal outputs before the ics output selection (i.e. for decoder box use). abbreviations bpf = band-pass filter. f mod = modulating frequency. d f m = frequency deviation of the main channel. d f s1 = frequency deviation of secondary channel 1 (left). d f s2 = frequency deviation of secondary channel 2 (right). f om = carrier frequency of main channel. f os1 = carrier frequency of secondary channel 1. f os2 = carrier frequency of secondary channel 2. if = intermediate frequency. il = input left. ir = input right. lpf = low-pass filter. nr = noise reduction. oml = output mute left. omr = output mute right. os = output select. pdm = presence detector auto mute. pe = port extension. pll = phase-locked loop. por = power-on reset. s/n = signal-to-noise ratio. vco = voltage controlled oscillator. handbook, halfpage 10 5 mbe284 10 4 10 3 10 2 10 4 0 8 12 16 20 24 transfer (db) f (hz) 20 db 0 db fig.4 noise reduction transfer as function of input level. handbook, halfpage 10 5 mbe285 10 4 10 3 10 2 10 4 0 4 8 8 12 16 transfer (db) f (hz) 50 m s 75 m s flat j17 fig.5 lf de-emphasis curves.
1996 mar 11 11 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 i 2 c-bus protocol table 1 slave receiver/transmitter address: d4 or d6 (hex) notes 1. as bit defined by level at address select (pin 12); 0 v = logic 0; 5 v = logic 1. 2. r/ w = 0; tda8745 is receiver (microcontroller is master transmitter). r/ w = 1; tda8745 is transmitter (microcontroller is master receiver). tda8745 receiver use in the receiver mode the device has four subaddresses with auto-increment, as shown in tables 2 to 5. table 2 input byte sa: 00; situation after por table 3 tuning byte sa: 01; situation after por table 4 select byte sa: 02; situation after por table 5 audio byte sa: 03; situation after por tda8745 transmitter use no subaddress. table 6 read byte bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 110101as (1) r/ w (2) il2 i7 il1 i6 il0 i5 ir2 i4 ir1 i3 ir0 i2 tun9 i1 tun8 i0 00000110 tun7 t7 tun6 t6 tun5 t5 tun4 t4 tun3 t3 tun2 t2 tun1 t1 tun0 t0 11101100 test s7 bb s6 os1 s5 os0 s4 pdm s3 pe s2 oml s1 omr s0 00000011 lev3 a7 lev2 a6 lev1 a5 lev0 a4 nr a3 dem1 a2 dem0 a1 bpfn a0 11001110 pdl r7 pdr r6 - r5 - r4 - r3 - r2 - r1 por r0 0 or 10 or 1111110 or 1
1996 mar 11 12 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 slave receiver mode (bits transmitted from microcontroller to tda8745) different if inputs can be selected for the plls, for switching between different external bpfs and/or channels; see tables 7 and 8. table 7 il2 to il0; input left; note 1 notes 1. x = dont care. 2. bit pe (s2) can be set to logic 1 to change if input 5 into digital output for external switching purposes. il2 i7 il1 i6 il0 i5 pe (2) s2 mode 0000if input in-1 selected for left pll (after por) 0010if input in-2 selected for left pll 0100if input in-3 selected for left pll 0110if input in-4 selected for left pll 1000if input in-5 selected for left pll 1010if input in-6 selected for left pll 1100no selection 1110no selection x 0 0 1 if input in-1 selected for left pll x 0 1 1 if input in-2 selected for left pll x 1 0 1 if input in-3 selected for left pll x 1 1 1 if input in-4 selected for left pll 0 x x 1 if input in-5 used as output; 0 = 0 v 1 x x 1 if input in-5 used as output; 1 = 5 v
1996 mar 11 13 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 table 8 ir2 to ir0; input right; note 1 notes 1. x = dont care. 2. bit pe (s2) can be set to logic 1 to change if input 6 into digital output for external switching purposes. ir2 i4 ir1 i3 ir0 i2 pe (2) s2 mode 0000if input in-1 selected for right pll 0010if input in-2 selected for right pll (after por) 0100if input in-3 selected for right pll. 0110if input in-4 selected for right pll 1000if input in-5 selected for right pll 1010if input in-6 selected for right pll 1100no selection 1110no selection x 0 0 1 if input in-1 selected for right pll x 0 1 1 if input in-2 selected for right pll x 1 0 1 if input in-3 selected for right pll x 1 1 1 if input in-4 selected for right pll 0 x x 1 if input in-6 used as output; 0 = 0 v 1 x x 1 if input in-6 used as output; 1 = 5 v
1996 mar 11 14 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 table 9 tun9 to tun0; tuning note 1. this is the situation after por. the frequency range of synthesizer is shown in table 10. table 10 frequency range of synthesizer notes 1. tuning the synthesizer below 29.04 mhz may be possible, but is not guaranteed. 2. the mixing frequency (f mix ) can be calculated with equation: f mix = (1024 + 512[tun9] + 256[tun8] + 128[tun7] + 64[tun6] + 32[tun5] + 16[tun4] + 8[tun3] + 4[tun2] + 2[tun1] + [tun0]) 10 khz. 3. tuning frequency = mixer input frequency - 10.7 mhz. tun9 i1 tun8 i0 tun7 t7 tun6 t6 tun5 t5 tun4 t4 tun3 t3 tun2 t2 tun1 t1 tun0 t0 10.7 if (mhz) 10.52 if (mhz) 0110101100 3.82 4.00 0110101101 3.83 4.01 0110101110 3.84 4.02 0110101111 to 1001010011 3.85 to 5.49 4.03 to 5.67 1001010100 5.50 5.68 1001010101 to 1010000101 5.51 to 5.99 5.69 to 6.17 1010000110 6.00 6.18 1010000111 to 1010110111 6.01 to 6.49 6.19 to 6.67 1010111000 6.50 6.68 1010111001 to 1011101011 6.51 to 7.01 6.69 to 7.19 1011101100 7.02 (1) 7.20 (1) 1011101101 to 1100001111 7.03 to 7.37 7.21 to 7.55 1100010000 7.38 7.56 1100010001 to 1100110011 7.39 to 7.73 7.57 to 7.91 1100110100 7.74 7.92 1100110101 to 1111111100 7.75 to 9.74 7.93 to 9.92 1111111101 9.75 9.93 1111111110 9.76 9.94 1111111111 9.77 9.95 parameter range (mhz) synthesizer frequency range 29.04 to 40.94 (in 20 khz grid); note 1 mixer input frequency range 14.52 to 20.47 (in 10 khz grid); note 2 tuning range 3.82 to 9.77 (in 10 khz grid; 10.7 mhz if); note 3
1996 mar 11 15 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 table 11 bit test table 12 bit bb; baseband; note 1 note 1. the pll demodulators can also be used for demodulating fm carriers (e.g. terrestrial tv sound) at baseband frequencies, by changing the lock range of the plls. table 13 bits os1 and os0; output select; note 1 note 1. the signal at both line outputs o l and o r (pins 23 and 22) can be selected with bits os1 and os0. table 14 bit pdm; presence detector auto mute; note 1 note 1. in both situations the status of the presence detector can be monitored by reading the bits pdl (r7) and pdr (r6) back from the ic. appropriate action (e.g. muting, channel selection or tuning) can then be taken by the microcontroller. note that this function also mutes the signal from the external inputs (pins 25 and 24). this may be desirable when using these inputs for connecting a satellite descrambler box. if not, reset pdm (s3) to logic 0 when selecting external [e.g. together with bits os1 (s5) and os0 (s4)]. test s7 mode description 0 - (por) in applications this bit should always be logic 0, to avoid con?icts with other settings 1 test setting test enables some special modes used for factory testing bb s6 mode description 0 synthesizer synthesizer use (plls central frequency approximately 10.7 mhz) (after por) 1 baseband baseband use (plls central frequency approximately 6 mhz) os1 s5 os0 s4 mode description 0 0 stereo (por) left channel audio (pin 33) at o l ; right channel audio (pin 31) at o r 0 1 left left channel audio (pin 33) at both o l and o r 1 0 right right channel audio (pin 31) at both o l and o r 1 1 external external left at (pin 25) at o l ; external right (pin 24) at o r pdm s3 mode description 0 - (por) - 1 pdm if this bit is set to logic 1, a channel for which no incoming carrier is found will be muted
1996 mar 11 16 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 table 15 bit pe; port extension; note 1 note 1. two if inputs (in-5 and in-6; pins 7 and 8) can be used as digital output instead. if no more than four if inputs are needed, two external functions can be controlled via the i 2 c-bus this way. the level at these pins is controlled by bits il2 (i7) and ir2 (i4); see tables 7 and 8. table 16 bits oml and omr; output mute left and output mute right; note 1 note 1. left and right audio can be muted independently. note that also the external input signals (pins 25 and 24) can be muted this way. pe s2 description 0 6 if inputs; no digital output (after por) 1 4 if inputs; 2 digital outputs bit level mode description oml (s1) 0 -- 1 mute left audio channel is muted omr (s0) 0 -- 1 mute right audio channel is muted
1996 mar 11 17 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 table 17 bits lev3 to lev0; level adjust; note 1 notes 1. the audio level can be adjusted in steps of 1 db, to adjust for different fm deviations used in main channel audio carriers and/or spread in pll output amplitude. with secondary carriers the noise reduction (nr) is to be used with the 0 db setting (note that the nr audio frequency response is level dependent, therefore another setting than 0 db is only to be used when making a fine-adjustment (+2 db/ - 2 db) for pll spread. typical setting for main channel carriers is in most cases 85 khz (0 db) or 76 khz (+1 db). 2. maximum deviation. 3. situation after por. table 18 bit nr; noise reduction; note 1 note 1. for reception of main channel carriers the nr circuit can be bypassed. lev3 a7 lev2 a6 lev1 a5 lev0 a4 mode secondary channels (2) (khz) main channel (2) (khz) 0000 - 12 db 199 338 0001 - 11 db 177 302 0010 - 10 db 158 269 0011 - 9 db 141 240 0100 - 8 db 126 214 0101 - 7 db 112 190 0110 - 6 db 100 170 0111 - 5 db 89 151 1000 - 4 db 79 135 1001 - 3 db 71 120 1010 - 2 db 63 107 1011 - 1db 56 95 1100 0db 50 (3) 85 (3) 1101+1db 45 76 1110+2db 40 68 1111+3db 35 60 nr a3 mode description 0 nr bypassed noise reduction bypassed (main channel) 1 nr active noise reduction active (secondary channels) (after por)
1996 mar 11 18 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 table 19 bits dem1 and dem0; de-emphasis; note 1; see fig.5 notes 1. different de-emphasis characteristics can be selected, to adjust for different main channel audio carriers. 2. in most cases the de-emphasis needed for main channel carriers is 50 m s. 3. the nr is to be used with the 75 m s setting for standard secondary channels. table 20 bit bpfn; band-pass filter not; note 1 note 1. to avoid interference by the video signal, the incoming baseband signal is filtered. if this filtering is not required the filter can be switched off. dem1 a2 dem0 a1 de-emphasis 0 0 no de-emphasis (?at) 0 1 j17 1050 m s (2) 1175 m s [por] (3) bpfn a0 description 0 mixer input signal ?ltered by bpf (after por) 1 mixer input signal is not ?ltered slave transmitter mode (bits transmitted from tda8745 to microcontroller) table 21 bit pdl; presence detector left; note 1 note 1. bit pdl (r7) transmits the current status of the left channel presence detector. when pdl = 1, no carrier is found at the currently selected frequency. if bit pdm (s3) = 0 the left channel audio is muted. table 22 bit pdr; presence detector right; note 1 note 1. bit pdr (r6) transmits the current status of the right channel presence detector. when pdr = 1, no carrier is found at the currently selected frequency. if bit pdm (s3) = 0 the right channel audio is muted. pdl r7 description 0 carrier detected at left channel 1 no carrier detected at left channel pdr r6 description 0 carrier detected at right channel 1 no carrier detected at right channel table 23 bit por; power-on reset; note 1 note 1. at switching on, or after a power dip on the i 2 c-bus supply voltage (v p2 ), an internal signal is generated which resets the i 2 c-bus registers to a pre-defined state. if bit por (r0) = 1, such a situation has occurred since the last time the read byte was read. after reading, the bit is reset to logic 0. table 24 bits r5 to r1 por r0 description 0 normal operation 1 por generated; power dip detected since last read of por bit - r5 - r4 - r3 - r2 - r1 description 11111 these bits have no function. although their state is ?xed, the microcontroller should not rely on this because of eventual future use.
1996 mar 11 19 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 limiting values in accordance with the absolute maximum rating system (iec 134). notes 1. all voltages referenced to ground at pins 6, 10, 14 and 32. 2. port extension enabled (pe = 1; see table 15). 3. in-5 and in-6 (pins 7 and 8) not being in the port extension mode. thermal characteristics symbol parameter conditions min. max. unit v p1 synthesizer and mixer supply voltage note 1 0 5.5 v v p2 i 2 c-bus supply voltage note 1 0 5.5 v v p3 general supply voltage note 1 0 13.2 v v n voltage on pins 2, 3, 5 and 40 note 1 0 5.5 v voltage on pins 7 and 8 note 2 0 v p2 v voltage on pins 1 and 42 note 1 0 7.7 v v i input voltage on pins 7, 8, 9, 11, 13 and 15 notes 1 and 3 0 1 v t stg storage temperature - 65 +150 c t amb operating ambient temperature - 20 +70 c symbol parameter value unit r th j-a thermal resistance from junction to ambient in free air sdip42 50 k/w qfp44 60 k/w
1996 mar 11 20 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 dc characteristics all voltages referenced to ground (pins 6, 10, 14 and 32). in accordance with the block diagram (see fig.1); v p1 =v p2 =5v; v p3 =12v; t amb =25 c; f os1 = 10.7 mhz; f os2 = 10.52 mhz (no modulation; see note 1); unless otherwise speci?ed. notes 1. presence of both carriers is required to achieve lock of the plls; otherwise not all pins will have a stable dc voltage. 2. pin 7 and 8 functioning as normal inputs (bit pe = 0). symbol parameter conditions min. typ. max. unit supply v p1 synthesizer and mixer supply voltage 4.5 5.0 5.5 v v p2 i 2 c-bus supply voltage 4.5 5.0 5.5 v v p3 general supply voltage 8.0 12 13.2 v i p1 synthesizer and mixer supply current - 37 48 ma i p2 i 2 c-bus supply current - 0.6 - ma i p3 general supply current - 35 46 ma p tot total power dissipation - 610 800 mw pins v 21,22,23 voltage on pins 21, 22 and 23 - 3.8 - v v 24,25,31,33 voltage on pins 24, 25, 31 and 33 - 3.8 - v v 31,33 voltage on pins 31 and 33 - 3.8 - v v 30,34 voltage on pins 30 and 34 - 3.8 - v v 27,37 voltage on pins 27 and 37 - 3.8 - v v 19 voltage on pin 19 3.7 3.8 3.9 v v 9,11,13,15 voltage on pins 9, 11, 13 and 15 note 2 - 0 - v v 42,1 voltage on pins 42 and 1 - 3.4 - v v 41,39 voltage on pins 41 and 39 - 2.6 - v v 5 voltage on pin 5 - 1.8 - v v 3 voltage on pin 3 - 2.4 - v v 2 voltage on pin 2 - 2.6 - v v 40 voltage on pin 40 - 1.3 - v port extensions (pins 7 and 8; bit pe = 1) v oh high level output voltage i oh = 0.5 ma 4.5 - 5v v ol low level output voltage i ol = - 0.5 ma 0 - 0.5 v
1996 mar 11 21 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 ac characteristics all voltages referenced to ground (pins 6, 10, 14 and 32); in accordance with the block diagram (see fig.1); v p1 =v p2 =5v; v p3 =12v; t amb =25 c; f mod = 1 khz; d f m = 46 khz; d f s1 = d f s2 = 27 khz (reference levels); f om = 10.7 mhz; f os1 = 10.7 mhz; f os2 = 10.52 mhz; if level at pins 9, 11, 13, 15, 7 an d8=20mv (rms value) and sfe 10.7mja (narrow), sfe 10.52mja (narrow) and sfe 10.7ms3 (wide) ceramic ?lters; unless otherwise speci?ed. symbol parameter conditions min. typ. max. unit band-pass ?lter, mixer and buffer r i input resistance 10 12.5 15 k w v i(rms) baseband input voltage (rms value) note 1 -- 200 mv v 3 1 db compression point (rms value) d v 3 -d v 5 = 1 db; note 2 - 180 - mv h l /h h ?lter transfer at 200 khz with respect to 7.3 mhz --- 60 db h lm /h h ?lter transfer at 2 mhz with respect to 7.3 mhz -- 28 - 20 db h mh /h h ?lter transfer at 5.3 mhz with respect to 7.3 mhz - 2+2+4db h h *a ?lter transfer at 7.3 mhz and mixer ampli?cation 15 17 19 db h h *c ?lter transfer at 7.3 mhz and mixer conversion gain note 3 10 12 14 db i o(p) mixer output current (peak) 5 7 - ma r o mixer output resistance f = 10.7 mhz; note 4 - 12 30 w charge pump, buffer ampli?er and vco t repetition time of charge pump pulses - 50 -m s s vco vco sensitivity note 5 -- 9 - mhz/v f vco vco frequency v loopf = 2.6 v - 35.4 - mhz crystal oscillator (4 mhz) f xtal crystal oscillator frequency - 4 - mhz r xtal resonance resistance of crystal -- 60 w c xtal parallel capacitance of crystal - 4.5 10 pf i i(p) input current from external 4 mhz source (peak) note 6 50 --m a if inputs (pins 9, 11, 13, 15, 7 and 8) and limiters v in-1 to in-6(rms) input sensitivity (rms value) s/n(a) = 40 db; d f s = 27 khz; nr = on; de-emphasis = 75 m s - 0.3 1 mv s/n(a) = 40 db; d f m = 46 khz; nr = off; de-emphasis = 50 m s - 0.8 2 mv v i1 to v i6 input signal thd 0.5% -- 200 mv
1996 mar 11 22 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 pll fm demodulators f cco free-running frequency pll left; bb = 0 - 10.6 - mhz pll right; bb = 0 - 10.6 - mhz pll left; bb = 1 - 6.9 - mhz pll right; bb = 1 - 6.9 - mhz d f cco lock range of plls bb = 0; note 7 10 - 11.5 mhz bb = 1; note 7 5.50 - 8.50 mhz v ol ; v or pll output voltage (pins 23 and 22) nr = off; deem = ?at; bb = 0 -- 5.6 - dbv nr = off; deem = ?at; bb = 1; note 8 -- 7.3 - dbv d v ol ; d v or spread of pll output voltage over lock range (pins 23 and 22) nr = off; deem = ?at; bb = 1; note 8 -- 1.5 db noise reduction low-pass ?lter 50 khz response with respect to 1 khz note 9 - 21 - 16 - 11 db v o 23,22 output voltage (pins 23 and 22) at 0 db nr input level; d f s1 = d f s2 = 50 khz; deem = ?at; note 10 - 1+1+3dbv at - 20 db nr input level; d f s1 = d f s2 = 5 khz; deem = ?at - 29 - 26 - 23 dbv 15 khz frequency response with respect to 1 khz at 0 db nr input level; d f s1 = d f s2 = 50 khz; deem = ?at - 2 0 +2 db at - 20 db nr input level; d f s1 = d f s2 = 5 khz; deem = ?at - 13 - 11.5 - 10 db v offset(dc) dc offset voltage on attack/recovery capacitors (pins 38 and 26) d f = 0 khz; all plls locked 14 - 22 mv de-emphasis 15 khz frequency response with respect to 1 khz ?at nr = off; deem = ?at - 0.5 0.0 +0.5 db nr = off; deem = j17; note 11 - 13.9 - 12.4 - 10.9 db nr = off; deem = 50 m s - 15.2 - 13.7 - 12.2 db nr = off; deem = 75 m s - 18.6 - 17.1 - 15.6 db r o output resistance (pins 34 and 30) 100 125 150 w symbol parameter conditions min. typ. max. unit v 37,27 (50 khz) v 37,27 (1 khz) --------------------------------- v 23,22 (15 khz) v 23,22 (1 khz) --------------------------------- - v 23,22 (15 khz) v 23,22 (1 khz) --------------------------------- -
1996 mar 11 23 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 overall performance v i 3(rms) baseband input sensitivity main sound carrier (rms value) s/n(a) = 40 db; d f s = 27 khz; nr = on; deem = 75 m s - 0.5 1.5 mv s/n(a) = 40 db; d f m = 46 khz; nr = off; deem = 50 m s - 1.5 3 mv v o 23,22 output voltage secondary channels; d f s = 27 khz; nr = on; deem = 75 m s - 8 - 6 - 4 dbv main channel; d f s = 46 khz; nr = off; deem = 50 m s - 8 - 6 - 4 dbv ubs unbalance output voltage secondary channels; nr = on; deem = 75 m s - 1 - +1 dbv main channel; nr = off; deem = 50 m s - 1 - +1 dbv thd total harmonic distortion secondary channels; nr = on; deem = 75 m s; note 12 - 0.1 0.5 % main channel; nr = off; deem = 50 m s; note 12 - 0.1 0.5 % s/n(a) signal-to-noise ratio a-weighted; secondary channels (synthesizer included); nr = on; deem = 75 m s; note 12 69 77 - db a-weighted; secondary channels (synthesizer excluded); nr = on; deem = 75 m s; note 12 72 80 - db a-weighted; main channel (synthesizer included); nr = off; deem = 50 m s; note 12 54 62 - db a-weighted; main channel (synthesizer excluded); nr = off; deem = 50 m s; note 12 62 70 - db mute att mute attenuation output select left and right muted 74 90 - db a ct s/s crosstalk attenuation between secondary channels - 74 - db svrr p3 supply voltage ripple rejection v rr = 100 mv; f i = 70 hz; nr = on; deem = 75 m s - 14.3 - db v rr = 100 mv; f i = 1 khz; nr = on; deem = 75 m s - 15.6 - db symbol parameter conditions min. typ. max. unit
1996 mar 11 24 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 notes 1. maximum of 0.5% thd at lf outputs. 2. when the increase of the output signal (pin 5 at 10.7 mhz) lags 1 db behind the increase of the input signal (pin 3; 7.02 mhz carrier), the so called 1 db compression point is reached. for complex signals (more than one sound carrier), this point will shift to a higher value. 3. the mixer performs both a mixing and amplifying action (normal operation). the synthesizer is tuned to the 7.3 mhz incoming carrier. 4. the buffer output is sensitive to capacitive loading, therefore (capacitive) loads other than those present in the block diagram (see fig.1) should be avoided. 5. as present at the mixer output (pin 5) in bpftilt test mode the actual vco sensitivity is two times the given value because of the divide-by-two circuit between vco output and mixer. 6. the required 4 mhz crystal can be omitted if this frequency is already available in the application. this signal source should be connected to pin 40, via a capacitor in series with a resistor r ext . the minimum required ac current is 50 m a, determined by the resistors r int and r ext and the level of the 4 mhz ac voltage. the value of r int is 700 w and the signal shape of the signal is not important. svrr p1-p2 supply voltage ripple rejection v rr = 100 mv; f i = 70 hz; nr = on; deem = 75 m s - 25 - db v rr = 100 mv; f i = 1 khz; nr = on; deem = 75 m s - 4 - db output select v i 25,24 input voltage (pins 25 and 24) -- 8 dbv r i 25,24,33,31 input resistance at pins 25, 24, 33 and 31 100 150 200 k w v o 23,22 output voltage at pins 23 and 22 v 24,25 = - 6 dbv; os = external - 6.5 - 6 - 5.5 dbv r o 23,22,21 output resistance at pins 23, 22 and 21 100 125 150 w thd total harmonic distortion v 24,25 = - 6 dbv; os = external; f=1khz - 0.01 0.3 % s/n(a) signal-to-noise ratio a-weighted; v 24,25 = - 6 dbv; os = external 80 -- db a ct l/r ; a ct r/l crosstalk between channels f = 1 khz - 80 - db i 2 c-bus c i input capacitance - 4 - pf i sink sda sink current 3 -- ma v ih high level input voltage 3 - 5v v il low level input voltage 0 - 1.5 v i ih high level input current -- 10 m a i il low level input current -- 10 m a address d4h address d4h add sel = low 0 - 1v address d6h address d6h add sel = high 3 - 5v f scl scl frequency -- 100 khz symbol parameter conditions min. typ. max. unit
1996 mar 11 25 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 7. maximum thd of 0.5%; 8 v < v p3 < 13.2 v; 0 c 1996 mar 11 26 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 baseband in 3 v p1 4 if out 5 syngnd 6 in-5 7 symbol pin equivalent circuit 3 mld096 12.5 k w 2.5 v 4v mld060 p1 5 mld061 mld062 6 syngnd mld063 7 275 w
1996 mar 11 27 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 in-6 8 in-1 9 hfgnd 10 in-2 11 add sel 12 symbol pin equivalent circuit mld097 8 275 w mld064 9 275 w mld065 10 hfgnd mld066 11 275 w mld067 12 275 w
1996 mar 11 28 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 in-3 13 i 2 cgnd 14 in-4 15 v p2 16 scl 17 sda 18 symbol pin equivalent circuit mld114 13 275 w mld068 14 i cgnd 2 mld098 15 275 w mld069 16 v p2 mld070 17 275 w mld071 18 275 w
1996 mar 11 29 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 v ref 19 v p3 20 o m 21 o r 22 symbol pin equivalent circuit mld072 19 15.2 k w 40 k w 125 w 275 w 25 w mld073 20 v p3 mld074 125 w 21 3.8 v mld075 125 w 22 3.8 v
1996 mar 11 30 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 o l 23 ext r 24 ext l 25 c att/rec r 26 symbol pin equivalent circuit mld076 125 w 23 3.8 v mld077 20 w 103 k w 3.8 v 3.8 v 24 i o i o transfer gate transfer gate 47 k w mld078 20 w 103 k w 3.8 v 3.8 v 25 i o i o transfer gate transfer gate 47 k w 26 mld079 100 w 100 w 3.8 v
1996 mar 11 31 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 rect r 27 c nr d r 28 c dr 29 deem out r 30 c cl r 31 symbol pin equivalent circuit mld080 4.7 k w 27 28 mld081 7.5 k w 275 w ac signal current mld082 3.8 v i o i o transfer gate transfer gate 125 w 29 30 mld083 20 w 103 k w 3.8 v 3.8 v 31 i o i o transfer gate transfer gate 47 k w
1996 mar 11 32 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 afgnd 32 c cl l 33 deem out l 34 c dl 35 c nr d l 36 symbol pin equivalent circuit mld084 32 afgnd substrate mld085 20 w 103 k w 3.8 v 3.8 v 33 i o i o transfer gate transfer gate 47 k w mld086 3.8 v i o i o transfer gate transfer gate 125 w 35 34 36 mld224 7.5 k w 275 w ac signal current
1996 mar 11 33 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 rect l 37 c att/rec l 38 pres det r 39 xtal 40 symbol pin equivalent circuit mld088 4.7 k w 37 38 mld089 100 w 100 w 3.8 v mld090 39 100 w 100 w 40 mld091
1996 mar 11 34 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 pres det l 41 c dc l 42 symbol pin equivalent circuit mld092 41 100 w 100 w mld093 42 1640 w 20 w 1640 w 20 w
1996 mar 11 35 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 package outlines unit b 1 cee m h l references outline version european projection issue date iec jedec eiaj mm dimensions (mm are the original dimensions) sot270-1 90-02-13 95-02-04 b max. w m e e 1 1.3 0.8 0.53 0.40 0.32 0.23 38.9 38.4 14.0 13.7 3.2 2.9 0.18 1.778 15.24 15.80 15.24 17.15 15.90 1.73 5.08 0.51 4.0 m h c (e ) 1 m e a l seating plane a 1 w m b 1 e d a 2 z 42 1 22 21 b e pin 1 index 0 5 10 mm scale note 1. plastic or metal protrusions of 0.25 mm maximum per side are not included. (1) (1) d (1) z a max. 12 a min. a max. sdip42: plastic shrink dual in-line package; 42 leads (600 mil) sot270-1
1996 mar 11 36 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 unit a 1 a 2 a 3 b p ce (1) eh e ll p z y w v q references outline version european projection issue date iec jedec eiaj mm 0.25 0.05 1.85 1.65 0.25 0.40 0.20 0.25 0.14 10.1 9.9 0.8 1.3 12.9 12.3 1.2 0.8 10 0 o o 0.15 0.1 0.15 dimensions (mm are the original dimensions) note 1. plastic or metal protrusions of 0.25 mm maximum per side are not included. 0.95 0.55 sot307-2 95-02-04 97-08-01 d (1) (1) (1) 10.1 9.9 h d 12.9 12.3 e z 1.2 0.8 d e e b 11 c e h d z d a z e e v m a x 1 44 34 33 23 22 12 y q a 1 a l p detail x l (a ) 3 a 2 pin 1 index d h v m b b p b p w m w m 0 2.5 5 mm scale qfp44: plastic quad flat package; 44 leads (lead length 1.3 mm); body 10 x 10 x 1.75 mm sot307-2 a max. 2.10
1996 mar 11 37 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 soldering introduction there is no soldering method that is ideal for all ic packages. wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. however, wave soldering is not always suitable for surface mounted ics, or for printed-circuits with high population densities. in these situations reflow soldering is often used. this text gives a very brief insight to a complex technology. a more in-depth account of soldering ics can be found in our ic package databook (order code 9398 652 90011). sdip s oldering by dipping or by wave the maximum permissible temperature of the solder is 260 c; solder at this temperature must not be in contact with the joint for more than 5 seconds. the total contact time of successive solder waves must not exceed 5 seconds. the device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (t stg max ). 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 (less than 24 v) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. if the temperature of the soldering iron bit is less than 300 c it may remain in contact for up to 10 seconds. if the bit temperature is between 300 and 400 c, contact may be up to 5 seconds. qfp r eflow soldering reflow soldering techniques are suitable for all qfp packages. the choice of heating method may be influenced by larger plastic qfp packages (44 leads, or more). if infrared or vapour phase heating is used and the large packages are not absolutely dry (less than 0.1% moisture content by weight), vaporization of the small amount of moisture in them can cause cracking of the plastic body. for more information, refer to the drypack chapter in our quality reference handbook (order code 9397 750 00192). reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. several techniques exist for reflowing; for example, thermal conduction by heated belt. dwell times vary from 50 to 300 seconds depending on heating method. typical reflow temperatures range from 215 to 250 c. preheating is necessary to dry the paste and evaporate the binding agent. preheat for 45 minutes at 45 c. w ave soldering wave soldering is not recommended for qfp packages. this is because of the likelihood of solder bridging due to closely-spaced leads and the possibility of incomplete solder penetration in multi-lead devices. if wave soldering cannot be avoided, the following conditions must be observed: a double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. the footprint must be at an angle of 45 to the board direction and must incorporate solder thieves downstream and at the side corners. even with these conditions, do not consider wave soldering the following packages: qfp52 (sot379-1), qfp100 (sot317-1), qfp100 (sot317-2), qfp100 (sot382-1) or qfp160 (sot322-1). during placement and before soldering, the package must be fixed with a droplet of adhesive. the adhesive can be applied by screen printing, pin transfer or syringe dispensing. the package can be soldered after the adhesive is cured. maximum permissible solder temperature is 260 c, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 c within 6 seconds. typical dwell time is 4 seconds at 250 c. a mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. r epairing soldered joints fix the component by first soldering two diagonally- opposite end leads. use only a low voltage soldering iron (less than 24 v) applied to the flat part of the lead. contact time must be limited to 10 seconds at up to 300 c. when using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 c.
1996 mar 11 38 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 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. purchase of philips i 2 c components 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. purchase of philips i 2 c components conveys a license under the philips i 2 c patent to use the components in the i 2 c system provided the system conforms to the i 2 c specification defined by philips. this specification can be ordered using the code 9398 393 40011.
1996 mar 11 39 philips semiconductors preliminary speci?cation satellite sound receiver with i 2 c-bus control tda8745 notes
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)40-2783749, fax. (31)40-2788399 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: philips semiconductors/components: tel. (800) 234-7381, fax. (708) 296-8556 chile: av. santa maria 0760, santiago, tel. (02)773 816, fax. (02)777 6730 china/hong kong: 501 hong kong industrial technology centre, 72 tat chee avenue, kowloon tong, hong kong, tel. (852)2319 7888, fax. (852)2319 7700 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. (45)32 88 26 36, fax. (45)31 57 19 49 finland: sinikalliontie 3, fin-02630 espoo, tel. (358)0-615 800, fax. (358)0-61580 920 france: 4 rue du port-aux-vins, bp317, 92156 suresnes cedex, tel. (01)4099 6161, fax. (01)4099 6427 germany: p.o. box 10 51 40, 20035 hamburg, tel. (040)23 53 60, fax. (040)23 53 63 00 greece: no. 15, 25th march street, gr 17778 tavros, tel. (01)4894 339/4894 911, fax. (01)4814 240 india: philips india ltd, 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)7640 000, fax. (01)7640 200 italy: philips semiconductors s.r.l., piazza iv novembre 3, 20124 milano, tel. (0039)2 6752 2531, fax. (0039)2 6752 2557 japan: philips bldg 13-37, kohnan 2 -chome, minato-ku, tokyo 108, tel. (03)3740 5130, fax. (03)3740 5077 korea: philips house, 260-199 itaewon-dong, yongsan-ku, seoul, tel. (02)709-1412, fax. (02)709-1415 malaysia: no. 76 jalan universiti, 46200 petaling jaya, selangor, tel. (03)750 5214, fax. (03)757 4880 mexico: 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)2783749, fax. (040)2788399 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. (63) 2 816 6380, fax. (63) 2 817 3474 portugal: philips portuguesa, s.a., rua dr. antnio loureiro borges 5, arquiparque - miraflores, apartado 300, 2795 linda-a-velha, tel. (01)4163160/4163333, fax. (01)4163174/4163366 singapore: lorong 1, toa payoh, singapore 1231, tel. (65)350 2000, fax. (65)251 6500 south africa: s.a. philips pty ltd., 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. (886) 2 382 4443, fax. (886) 2 382 4444 thailand: philips electronics (thailand) ltd., 209/2 sanpavuth-bangna road prakanong, bangkok 10260, thailand, tel. (66) 2 745-4090, fax. (66) 2 398-0793 turkey: talatpasa cad. no. 5, 80640 gltepe/istanbul, tel. (0 212)279 27 70, fax. (0212)282 67 07 ukraine: philips ukraine, 2a akademika koroleva str., office 165, 252148 kiev, tel. 380-44-4760297, fax. 380-44-4766991 united kingdom: philips semiconductors ltd., 276 bath road, hayes, middlesex ub3 5bx, tel. (0181)730-5000, fax. (0181)754-8421 united states: 811 east arques avenue, sunnyvale, ca 94088-3409, tel. (800)234-7381, fax. (708)296-8556 uruguay: coronel mora 433, montevideo, tel. (02)70-4044, fax. (02)92 0601 internet: http://www.semiconductors.philips.com/ps/ for all other countries apply to: philips semiconductors, international marketing and sales, building be-p, p.o. box 218, 5600 md eindhoven, the netherlands, telex 35000 phtcnl, fax. +31-40-2724825 scds47 ? philips electronics n.v. 1996 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 537021/1100/02/pp40 date of release: 1996 mar 11 document order number: 9397 750 00723

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