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ordering information device temp range package MC44BC373dtb,r2 mc44bc374dtb,r2 MC44BC373dw,r2 mc44bc374dw,r2 MC44BC373bdtb,r2 mc44bc374bdtb,r2 MC44BC373bdw,r2 mc44bc374bdw,r2 ?10 o cto+80 o c tssop24 tssop24 so24-wb so24-wb tssop24 tssop24 so24-wb so24-wb note: for tape and reel, add r2 suffix. so24-wb package tssop 24 package this document contains information on a product under development. motorola reserves the right to change or discontinue this product without notice. ? motorola, inc., 2002. all rights reserved. MC44BC373/3b/4/4b th e se m o d ul a t o r i c s a r e f or use in vcrs, g a m e s, s e t - t op b oxes , and s i m il ar dev i c e s. figure 1 shows the pin connections. figure 1. MC44BC373/3b/4/4b pin connections gndd vccd xtal vcrvcc gnd vcrtu/tvout2 tvovcc gnd audio ant2 ant1 gnd pllflt sda scl lop preem tvout/tvout1 gnd vcca 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 auxin splflt 11 12 vcci video 14 13 single output version, pin20istvout pin 17 is vcrtu dual outputs version, pin20istvout1 pin17istvout2 technical data contents 1 features.............2 2 deviceoverview ......3 3 maximumratings .....6 4 electrostatic discharge 6 5electrical characteristics 6 6i 2 cbitmapping .......7 7i 2 c programming . . . . . 8 8 modulator high frequency characteristics 10 9 video characteristics . 11 10 audio characteristics . 12 11 antenna booster/splitter characteristics 13 12 modulator operation . 15 13 high-speed i 2 c compatible bus 19 14 application and case diagrams ...........22 MC44BC373/d rev. 3.3, 5/2002 MC44BC373/3b/4/4b single or dual output multi-standard or pal/ntsc modulator and antenna booster/splitter ics
2 MC44BC373/3b/4/4b technical data motorola features 1 features MC44BC373: multi-standard pal/secam/ntsc single output modulator mc44bc374: pal/ntsc only single output modulator MC44BC373b: multi-standard pal/secam/ntsc dual output modulator mc44bc374b: pal/ntsc only dual output modulator the channel is set by an on-chip high-speed i 2 c compatible bus receiver. a phase-locked loop (pll) tunes the modulator over the full uhf range. the modulator incorporates a sound subcarrier oscillator and uses a second pll to derive 4 . 5, 5 . 5, 6 . 0, and 6 . 5mhz subcarrier frequencies. these frequencies are selected using the bus. the modulation standard is chosen using a control bit that selects either system l or system b/g (MC44BC373/3b only). the picture-to-sound ratio is adjusted using the bus. in addition, an on-chip video test pattern generator can be switched on using a 1khz audio test signal. along with the modulator functions, an antenna booster/splitter function is included on dual output versions (MC44BC373b/4b), the modulated signal is added to the antenna booster/ splitter outputs. all four modulator versions are completely pin-to-pin and software compatible and all versions have the following features. ? no external varicaps diodes/inductors or tuned components channel 21?69 uhf operation vhf range possible by internal dividers (30mhz to 450mhz) integrated on-chip programmable uhf oscillator extremely low external component count high-speed read and write i 2 c-bus compatible (800khz) fixed video modulation depth (80% in pal and 90% in secam) peak white clip disabled using the bus programmable picture/sound carrier ratio (12db and 16db) integrated on-chip programmable sound subcarrier oscillator (4 . 5mhz to 6 . 5mhz)?no external varicaps on-chip video test pattern generator with sound test signal (1khz) low-power programmable modulator standby mode (booster active) transient output inhibit during pll lock-up at power-on logical output port controlled by bus integrated antenna booster/splitter (40mhz to 860mhz) custom masked versions with unique start-up settings possible (no i 2 c bus programming required) extremely robust esd protection, minimum 4kv, typical 6kv
device overview motorola MC44BC373/3b/4/4b technical data 3 2 device overview figure 2 shows a simplified block diagram of the MC44BC373/4 device. figure 3 shows a simplified block diagram of the MC44BC373b/4b device. the MC44BC373/3b/4/4b device contains four main sections: 1. a high-speed i 2 c-compatible bus section. 2. a pll section ? synthesizes the uhf/vhf output channel frequency (from an integrated uhf oscillator, divided for vhf output). 3. a modulator section ? accepts audio and video inputs and then uses those inputs to modulate the uhf/vhf carrier. 4. an antenna booster/splitter ? amplifies and splits the antenna signal into two signals: a) on the MC44BC373/4 devices, the modulated signal is added to the amplified antenna signal on the tvout pin. b) on the MC44BC373b/4b devices, the modulated signal is added to both amplified antenna signals on the tvout1 and tvout2 pins. the following items are programmable using the high-speed i 2 c compatible bus: channel frequency sound frequency sound/picture carrier ratio an on-chip video test pattern generator with an audio test signal is included. the MC44BC373 operates as a multi-standard modulator and can handle the following systems using the same external circuit components: b/g i d/k h l m/n the high frequency bicmos technology permits integration of the following functions: antenna booster/splitter uhf tank circuit and certain filtering
4 MC44BC373/3b/4/4b technical data motorola device overview figure 2. simplified block diagram?MC44BC373/4 75 ? 11 21 6 1 2 9 12 22 14 4 7 4db 17 16 20 10 19 18 75 ? 3 15 23 24 5 8 13 gnd gnd tvovcc tvout vcci vcrtu gnd gnd ant2 ant1 lop video spllflt audio vcca aux in preem xtal pllflt gndd vccd scl sda bus section vco and pll section modulator section bst section clamp peak white l/bg 31.25 31.25khz 4mhz xco ref divider /128 phase comp pll prog divider prescaler/8 vhf dividers video modulator lpf lpf sound modulator l/bg fm am alc lpf prog divider am modulator audio amplifier sound oscillator and fm modulator sound pfd khz high-speed i 2 cbus receiver uhf osc i 2 cbus i 2 cbus i 2 cbus i 2 cbus l/bg i 2 cbus
device overview motorola MC44BC373/3b/4/4b technical data 5 figure 3. simplified block diagram?MC44BC373b/4b 75 ? 11 21 6 1 2 9 12 22 14 4 7 4db 17 16 20 10 19 18 75 ? 3 15 23 24 5 8 13 gnd gnd tvovcc tvout1 vcci tvout2 gnd gnd ant2 ant1 lop video spllflt audio vcca aux in preem xtal pllflt gndd vccd scl sda bus section vco & pll section modulator section bst section clamp peak white l/bg 31.25 31.25khz 4mhz xco ref divider /128 phase comp pll prog divider prescaler/8 vhf dividers video modulator lpf lpf sound modulator l/bg fm am alc lpf prog divider am modulator audio amplifier sound oscillator and fm modulator sound pfd khz high-speed i 2 cbus receiver uhf osc i 2 cbus i 2 cbus i 2 cbus i 2 cbus l/bg i 2 cbus
6 MC44BC373/3b/4/4b technical data motorola maximum ratings 3 maximum ratings 4 electrostatic discharge 5 electrical characteristics a = 100% tested b = 100% correlation tested c = characterized on samples d = design parameter 5.1 specification conditions unless otherwise stated: v cc =5 . 0v, ambient temperature=25 o c, video input 1v p-p , 10-step grayscale. rf inputs/outputs into 75ohm load. specifications only valid for envelope demodulation. sym parameter min typ unit esd hbm (human body model)?mil-std-883c, method 3015-7 4000 6000 v parameter min typ max unit notes type operating supply voltage range 4 . 55 . 05 . 5v b total supply current 65 75 88 all sections active a total standby mode supply current 26 34 40 ma osc, so, att=1 bus section active a test pattern sync pulse width 3 4 . 76 . 5 sb sound comparator charge pump current during locking when locked 7 0 . 7 10 1 12 1 . 5 a a a a rf comparator charge pump current 60 100 150 aa crystal oscillator stability-negative resistance 1 ? ? k ? d logic output port saturation voltage at i=2ma leakage current ? ? 160 ? 300 1 mv a a a sym parameter value unit vcc1 supply voltage 6 v tamin minimum operating ambient temperature ?10 o c tamax maximum operating ambient temperature 75 o c tstgmin minimum storage temperature ?65 o c tstgmax maximum storage temperature 150 o c this device contains protection circuitry to guard against damage due to high static voltage or electric fields. however, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high impedance circuit. for proper operation, input and output voltages should be constrained to the ranges indicated in the recommended operating conditions. maximum ratings are those values beyond which damage to the device may occur. for functional operation, voltage should be restricted to the recommended operating condition.
i 2 c bit mapping motorola MC44BC373/3b/4/4b technical data 7 6i 2 c bit mapping write mode bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 ack ca-chipaddress 11001010ack c1-high order bits 1 aux so lop ps x3 x2 sysl ack c0-low order bits pwc osc att sfd1 sfd0 tb1 x5 x4 ack fm-high order bits 0 tpen n11 n10 n9 n8 n7 n6 ack fl-loworderbits n5n4n3n2n1n0x1x0ack read mode bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 ack chipaddress 11001011ack r-statusbyte ?????y2y1oor? bit name description pwc peak white clip enable/disable. osc uhf oscillator on/off. att modulator output attenuated-sound and video modulators on/off. sfd0, 1 sound subcarrier frequency control bits. tb1 test mode bit?bus format compatible with mc44353. aux auxiliary sound input enable/disable. so sound oscillator on/off. lop logic output port. ps picture-to-sound carrier ratio. sysl system l enable?selects am sound and positive video modulation (MC44BC373/3b only). tpen test pattern enable?picture and sound. x5?x0 test mode bits?all bits are 0 for normal operation (see test mode tables, page 8 & page 9). n0?n11 uhf frequency programming bits, in steps of 250khz. oor rf oscillator out-of-frequency range information. y1, y2 rf oscillator operating range information.
8 MC44BC373/3b/4/4b technical data motorola i 2 c programming 7i 2 c programming write mode: test mode 1 and vhf range x2 x1 x0 state description 0001 . a normal operation. 0011 . b rf frequency divided for low frequency testing or vhf range: rf/2 0101 . crf/4 0111 . drf/8 1001 . erf/16 1011 . f dc drive applied to modulators: non-inverted video at tvout. 1101 . g dc drive applied to modulators: inverted video at tvout. 1111 . h transient output inhibit disabled. sound video sfd1 sfd0 sound subcarrier freq (mhz) 00 4 . 5 01 5 . 5 10 6 . 0 11 6 . 5 ps picture-to-sound ratio (db) 012 116 so sound oscillator 0 sound oscillator on (normal mode). 1 sound oscillation disabled (oscillator and pll section bias turned off). aux auxiliary audio input 0 aux input disabled (normal mode). 1 aux input enabled. sysl system l and b/g selection MC44BC373/3b only 0 system b/g enabled, system l disabled (fm sound and negative video modulation). 1 system l enabled, system b/g disabled (am sound and positive video modulation). pwc peak white clip 0 peak white clip on (system b/g). 1 peak white clip off (system l). tpen test pattern signal 0 test pattern signal off (normal operation). uhf standby mode mc44353/4/5 compatibility logic output port osc uhf oscillator 0 normal operation. 1 uhf oscillator disabled (oscillator and pll sections bias turned off). att modulator output attenuation 0 normal operation. 1 modulator output attenuation (sound and video modulators sections bias turned off). osc so att combination of 3-bits 111 modulator standby mode (sound and uhf oscillator, sound and video modulator section bias turned off, and i 2 c bus section standby mode)?bst is active. tb1 description 0 normal mode (fully programmable). 1 limited programmability and compatibility with mc44353. lop description 0 pin 3 is low voltage. 1 pin 3 is high impedance.
i 2 c programming motorola MC44BC373/3b/4/4b technical data 9 write mode: test mode 2 read mode x5 x4 x3 state description 0002 . a normal operation. 0012 . b test pattern generator dc verification (test pattern dc test mode available). 0102 . c programmable divider test (uhf programmable divider on pllfilt pin and sound programmable divider on spllfil pin). 0112 . d reference divider test (uhf reference divider on pllfilt pin). 1002 . e uhf phase comparator, upper source on pllfilt pin. sound phase comparator 10 a upper source on spllfil (only valid during transient output inhibit). 1012 . f uhf phase comparator, lower source on pllfilt pin. sound phase comparator 10 a lower source on spllfil (only valid during transient output inhibit). 1102 . g sound phase comparator 1 a upper source on spllfil (not valid during transient output inhibit). 1112 . h sound phase comparator 1 a lower source on spllfil (not valid during transient output inhibit). oor description 0 normal operation, vco in range. 1 vco out-of-range. y1 description 0 vco out-of-range, frequency too low, only valid if oor=1. 1 vco out-of-range, frequency too high, only valid if oor=1. y2 description 0 high vco is active. 1 low vco is active.
10 MC44BC373/3b/4/4b technical data motorola modulator high frequency characteristics 8 modulator high frequency characteristics unless otherwise stated: v cc =5 . 0v, ambient temperature=25 o c, video input 1v p-p , 10-step grayscale. rf inputs/outputs into 75ohm load. specifications valid only for envelope demodulation. for dual outputs devices (MC44BC373/4b), tvout characteristics are valid for both tvout1 and tvout2. figure 4. typical performance?modulator high frequency parameter test conditions min typ max unit type tvout output level output signal from modulator section. see figure 4. 73 74 . 577db vb uhf oscillator frequency ? 460 ? 880 mhz a vhf range from uhf oscillator internally divided. 45 ? 460 mhz b tvout output attenuation during transient output inhibit, or when att bit is set to 1. see figure 4. 50 60 ? dbc b sound subcarrier harmonics (fp + n ? fs) reference picture carrier. ? ?63 ?58 dbc c second harmonic of chroma subcarrier using red ebu bar. ?65 ? ? dbc c chroma/sound intermodulation: fp + (fsnd ? fchr) using red ebu bar. ?65 ? ? dbc c fo (picture carrier) harmonics 2nd harmonic: ch21 3rd harmonic: ch21 other channels: see figure 4. see note 1. 30 20 35 26 ? ?dbc c out band (picture carrier) spurious 1/2 ? fo?1/4 ? fo?3/2 ? fo?3/4 ? fo from 40mhz to 1ghz. ?010db vc in band spurious (fo 5mhz) no video sound modulation. ? ? 60 dbc c note 1: picture carrier harmonics are highly dependant on printed circuit board layout and decoupling capacitors. tv output level 72 73 74 75 76 77 78 471 521 571 621 671 721 771 821 871 frequency (mhz) dbuv tv output attenuation 45 50 55 60 65 70 75 471 521 571 621 671 721 771 821 871 frequency (m hz) dbc 3fo harm onics 15 20 25 30 35 40 45 471 521 571 621 671 721 771 821 871 frequency (mhz) dbc 2fo harm onics 15 20 25 30 35 40 471 521 571 621 671 721 771 821 871 frequency (mhz) dbc typical minimum specification minimum specification typical typical typical minimum specification maximum specification minimum specification
video characteristics motorola MC44BC373/3b/4/4b technical data 11 9 video characteristics unless otherwise stated: v cc =5 . 0v, ambient temperature=25 o c, video input 1v p-p ,10-step grayscale. rf inputs/outputs into 75ohm load. specifications valid only for envelope demodulation. figure 5. typical performance?video parameter test conditions min typ max unit type video bandwidth reference 0db at 100khz, measured at 5mhz. ?1 . 5?0 . 8? dbc video input level 75ohm load. ? ? 1 . 5vcvbsd video input current ? ? 0 . 21 aa video input impedance ? 500 ? ? k ? a peak white clip pwc bit set to 1, see pwc section. 110 114 118 % a video s/n see figure 5. 50 53 ? db c differential phase see figure 5. ?5 ? 5 deg c differential gain on line ccir 310, worst of first 4 out of 5 steps. see figure 5. ?5 ? 5 % c luma/sync ratio input ratio 7 . 0:3 . 06 . 8/3 . 2?7 . 2/2 . 8? b pal video modulation depth ? 75 81 88 % b secam video modulation depth ? 88 93 99 % b video signal to noise 48 50 52 54 56 58 471 521 571 621 671 721 771 821 871 fr e que ncy (m hz ) db pal video modulation depth 74 76 78 80 82 84 86 88 90 471 521 571 621 671 721 771 821 871 fr e q ue n cy (m hz ) % secam video modulation depth 86 88 90 92 94 96 98 100 471 521 571 621 671 721 771 821 871 frequency (mhz) % typical typical typical minimum specification maximum specification maximum specification minimum specification minimum specification
12 MC44BC373/3b/4/4b technical data motorola audio characteristics 10 audio characteristics unless otherwise stated: v cc =5 . 0v, ambient temperature=25 o c, video input 1v p-p ,10-step grayscale. rf inputs/outputs into 75ohm load. specifications valid only for envelope demodulation. figure 6. typical performance?audio parameter test conditions min typ max unit type picture-to-sound ratio ps bit set to 0. ps bit set to 1. 13 9 16 12 19 15 db b audio modulation depth using specific pre-emphasis circuit, audio input level=205mvrms?audio frequency=1khz am modulation: secam fs=6 . 5mhz 65 80 95 % b fm modulation: fs=5 . 5, 6 or 6 . 5mhz 100% modulation=50khz fm deviation 65 80 95 % b fm modulation: ntsc fs=4 . 5mhz 100% modulation=25khz fm deviation 65 80 95 % b audio input resistance ? 45 53 61 k ? a audio frequency response reference 0db at 1khz, using specified pre-emphasis circuit, measure from 50hz to 15khz. ?2 . 5? + 2db c audio distortion fm (thd only) at 1khz, 100% modulation ( 50khz). no video. ?0 . 42 % c audio distortion am (thd only) at 1khz, 100% modulation. no video. ?1 . 52 . 5% d audio s/n with sync buzz fm video input ebu color bar 75%. weighting filter ccir 468-2. 48 53 ? db c audio s/n with sync buzz am reference 1khz, 85% modulation. video input ebu color bar 75%. audiobwfrom40hzto15khz. weighting filter ccir 468-2. 45 50 ? db d audio signal to noise 46 48 50 52 54 56 58 471 521 571 621 671 721 771 821 871 frequency (mhz) db typical minimum specification
antenna booster/splitter characteristics motorola MC44BC373/3b/4/4b technical data 13 11 antenna booster /splitter characteristics unless otherwise stated: v cc =5 . 0v, ambient temperature=25 o c, rf inputs/outputs into 75ohm load. all specifications use a balun at ant1 & 2 inputs, assuming 0 . 8db losses max from 40mhz to 860mhz. 11.1 typical performance?gain and isolation figure 7. typical performance?gain and isolation parameter test conditions min typ max unit type frequency range ? 40 ? 860 mhz c gain ant1, 2 to vcrtu. ant1, 2 to tvout. ? 4 4 ? db db b b gain flatness 40 to 860mhz. ?1 . 5 + 1 . 5db c noise figure ant1, 2 to vcrtu and tvout. modulator in standby mode. 5 . 57 . 59 . 5db c noise figure ant1, 2 to vcrtu and tvout. modulator in normal mode (on). 6 . 58 . 510 . 5db c vswr all pins, bst bias on. at tvout and vcrtu pins, bst bias off. ?1 . 52 . 5? b at tvin pins, bst bias off. ? 2 . 53 ? b intermodulation (imd) input level=90dbuv. see imd measurement section. f1 + f2 imd 2f1?f2, 2f2 + f1, f1?f2 imd ? ? 55 60 47 50 dbc dbc c c isolations from tvout or vcr to ant1, 2 tvout/vcrtu 48 30 60 45 ? ? dbc dbc c c gain ant1,2 to vcrtu and tvout 1 2 3 4 5 6 7 0 150 300 450 600 750 900 frequency (mhz) db tvout vcrtu isolation output to input -90 -80 -70 -60 -50 -40 -30 0 150 300 450 600 750 900 frequency (mhz) dbc isolation output to output -70 -60 -50 -40 -30 -20 -10 0 150 300 450 600 750 900 fr e q ue n cy (m h z ) dbc typical typical typical minimum specification minimum specification minimum specification maximum specification
14 MC44BC373/3b/4/4b technical data motorola antenna booster/splitter characteristics 11.2 typical performance?noise figure figure 8. typical performance?noise figure 11.3 intermodulation (imd ) measurement figure 9. intermodulation (imd) measurement intermodulation (imd) frequencies are all frequency combinations coming from the two input carriers f1 and f2: f2?f1, 2 ? f1?f2, 2 ? f2?f1 and f1 + f2, fall in the 40mhz?900mhz range. f1 and f2 input levels are set to 90dbuv at the input of the balun. f1 and f2 frequency generator levels (50w internal load) take into account a 50 to 75ohm load difference (1 . 8db), plus losses in the 3db coupler and the 50 to 75ohm transformer. intermodulation measurement is the difference (in dbc) between the f1 or f2 level at the output (vcrtu or tvout) and the frequency combinations level, for the following cases: intermodulation specification is the imd measurement?s worst case. f1=50mhz and f2=60mhz f1=100mhz and f2=110mhz f1=200mhz and f2=210mhz f1=300mhz and f2=310mhz f1=400mhz and f2=410mhz f1=500mhz and f2=510mhz f1=600mhz and f2=610mhz f1=700mhz and f2=710mhz f1=800mhz and f2=810mhz noise figure @ modulator off 5 6 7 8 9 10 11 0 150 300 450 600 750 900 fr e q ue n cy (m hz ) db noise figure @ modulator on 6 7 8 9 10 11 12 0 150 300 450 600 750 900 fr e q ue n cy (m hz ) db typical typical maximum specification maximum specification f1 f2 MC44BC373/4 75/50 balun tvout vcrtu pin 20 pin 17 50/75 75/50 90dbuv f1 f2 f1 f2 2f2?f1 2f1?f2 f2?f1 f1+f2 imd (dbc) spectrum analyzer
modulator operation motorola MC44BC373/3b/4/4b technical data 15 12 modulator operation 12.1 power-on settings at power-on, the MC44BC373/3b and mc44bc374/4b configuration is as follows: the settings indicated can be customized in the special masked version. 12.2 power supply the five device vcc pins (13, 15, 16, 21, 23) must be applied at the same time to ensure all internal blocks are correctly biased. all other pins must not be biased before vcc is applied to the device. the printed circuit board layout of the vcc supplies must be designed to ensure maximum isolation of the i/p to o/p and also between the two o/ps. 12.3 standby mode during standby mode, the modulator is switched to low power consumption; the sound oscillator, uhf oscillator, video and sound modulator sections bias are internally turned off. the i 2 c bus and booster sections remain active. the modulator can be programmed in standby mode using a combination of three bits: 1. osc=1 2. so=1 3. att=1 write mode bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 ack c1?highorderbits 10000000ack c0?loworderbits 00001000ack fm?high order bits 0 0 n11 n10 n9 n8 n7 n6 ack fl?low order bits n5 n4 n3 n2 n1 n0 0 0 ack note: 1. n0 to n11 are set to have the uhf oscillator on channel 36 (591.25mhz). note: 2. peak white clip is on. note: 3. sound frequency is 5 . 5mhz. note: 4. sound auxiliary input is disabled. note: 5. logic output port is low voltage. note: 6. picture-to-sound ratio is 12db.
16 MC44BC373/3b/4/4b technical data motorola modulator operation 12.4 test bit tb1 this test bit allows an initial evaluation of MC44BC373/3b and mc44bc374/4b using software developed for mc443535: tb1= 0 ? all MC44BC373/3b/4/4b functions available?normal mode. tb1= 1 ? limited software compatibility with mc44353; MC44BC373/3b/4/4b functions not available. 12.5 system l or b /g selection sysl bit internally switches the following functions: sysl = 0; enables b/g system ? video modulation polarity?negative ? video modulation depth?80% typical (see video characteristics on page 11.) ? sound modulation type?fm sysl = 1; enables l system ? video modulation polarity?positive ? video modulation depth?90% typical (see video characteristics on page 11.) ? sound modulation type?am 12.6 transient output inhibit to minimize the risk of interference to other channels while the uhf pll is acquiring a lock on the desired frequency, the sound and video modulators are turned off for each of the following two cases: 1. power-on from zero (i.e., all vcc is switched from 0v to 5v). 2. uhf oscillator power-on from off state (i.e., osc bit is switched from 1 to 0) write mode 1 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 ack ca-chipaddress 11001010ack c1-high order bits 1 ? ? ps ? ? sysl ack c0-low order bits ? ? ? sfd1 sfd0 1 0 0 ack fm-high order bits 0 tpen n11 n10 n9 n8 n7 n6 ack fl-loworderbits n5n4n3n2n1n0 ? ?ack note: 1. case tb1=1, compatible with mc44353 note: 2. all ??? are don?t care bits. note: 3. ps bit replaces psd2 bit in mc44353 bus format: ps = 0 is for picture-to-sound ratio = 12db, ps = 1 is for picture-to-sound ratio = 16db note: 4. sfd1 and sfd0 bits have the same definition for both bus formats (mc44353 and MC44BC373/3b/4/4b) and lets a sound frequency between 4 . 5mhz, 5mhz, 5 . 5mhz, and 6 . 5mhz be selected. note: 5. sysl bit has same definition for bus formats mc44353 and MC44BC373/3b/4/4b; either system l or b/g is selectable. note: 6. all MC44BC373/3b/4/4b functions are set to their default values.
modulator operation motorola MC44BC373/3b/4/4b technical data 17 there is a time-out of 263ms until the output is enabled. this allows the uhf pll settle to its programmed frequency. during the 263ms time-out, the sound pll current source is set to 10 a typical, to speed up the locking time. after the 263ms time-out, the current source is switched to 1 a. caution: use care when selecting loop filter components, to ensure the loop transient does not exceed the specified delay. for test purposes, it is possible to disable the 263ms delay using test mode1?state1 . h. 12.7 logic output port (lop) the lop pin controls any logic function. the primary applications are to control an external attenuator or an external switch between the antenna input and tv output. when an external switch is controlled, the booster function is not used. the following figure shows a typical attenuator application with pin diode. the lop pin switches the pin attenuator depending on the signal strength of the antenna input, thereby reducing the risks of intermodulation in certain areas. the lop may also be used as an off position bypass switch or for other logic functions in the application. figure 10. attenuator application with pin diode 12.8 video section?peak white clip the modulator requires the following: a composite video input with ?negative going? sync pulses a nominal level of 1vp-p this signal is ac-coupled to the video input where the sync tip level is clamped. the video signal is then passed to a peak white clip (pwc) circuit. the pwc circuit function sets to soft-clip the top of the video waveform, if the ?sync tip amplitude? to ?peak white clip? goes too high. this method avoids carrier over- modulation by the video. clipping can be disabled by software. 12.9 sound section the multivibrator oscillator is fully integrated and does not require external components. an internal low pass filter and matched structure provide a very low harmonics level. the sound modulator system consists of an fm modulator incorporating the sound subcarrier oscillator, and an am modulator. the audio input signal is ac coupled into the amplifier which then drives the two types of modulators. the audio pre-emphasis circuit is a high-pass filter with an external capacitor and an internal resistor (100kohms). the recommended capacitor value (470pf) is for bg standard. (50 s time constant.) lop pin vcc tv out antenna input
18 MC44BC373/3b/4/4b technical data motorola modulator operation the auxiliary audio input adds a sound subcarrier to the main carrier. the input can be a modulated nicam carrier or a second sound subcarrier for a stereo system. pin 12 is directly connected to the sound modulator input and the picture-to-sound ratio (p/s ratio) depends on the auxiliary audio input level. (p/s ratio is 20db for 35mvrms typical.) 12.10 test pattern generator a simple test pattern is generated on the ic which can be switched in under bus control to permit a tv receiver to easily tune in to the modulator output. the pattern consists of two white vertical bars on a black background and a 976hz audio test signal. figure 11. test pattern generator?(time in seconds) 12.11 pll section the reference divider is a fixed divide-by-128, resulting in a reference frequency of 31 . 25khz with a 4 . 0mhz crystal. the 31 . 25khz reference frequency is used for both uhf and sound plls. the prescaler is a fixed divide by 8 and is permanently engaged. the programmable divider?s division ratio is controlled by the state of control bits n0 to n11. the divider ratio n for a desired frequency f (in mhz) is provided by the following formulas: with: 12.12 uhf oscillator?vhf range the uhf oscillator is fully integrated and does not require any external components. for low frequency testing or vhf range operation (test mode 1, states 1 . bto1 . c), the uhf oscillator can be internally divided by 2, 4, 8, or 16. 10 20 30 40 50 60 0 64 te1 24 28 44 time in s. 7/10 3/10 te2 n f 8 -- - 128 4 -------- - = n 2048 n11 1024 n10 4n2 2n1 n0 + ++++ =
high-speed i 2 c compatible bus motorola MC44BC373/3b/4/4b technical data 19 13 high-speed i 2 c compatible bus 13.1 specification conditions unless otherwise specified, the vcc1=5.0v and the ambient temperature (ta) =25 o c. 13.2 timing definitions electrical characteristics min typ max unit type sda/scl output current at 0 v ? ? 10 aa sda/scl low input level ? ? 1.5 v b sda/scl high input level 3.0 ? ? v b sda/scl input current for input level from 0 . 4v to 0 . 3vcc ?5 ? 5 ac sda/scl input level 0 ? vcc+0,3 v d sda/scl capacitance ? ? 10 pf c ack low output level (sinking 3ma) ? 0,3 1 v a ack low output level (sinking 15ma) ? ? 1.5 v c timing characteristics min typ max unit type bus clock frequency 0 ? 800 khz c bus free time between stop and start 200 ? ? ns c setup time for start condition 500 ? ? ns c hold time for start condition 500 ? ? ns c data setup time 0 ? ? ns c data hold time 0 ? ? ns c setup time for stop condition 500 ? ? ns c hold time for stop condition 500 ? ? ns c acknowledge propagation delay ? ? 300 ns c sda fall time at 3ma sink i and 130pf load ? ? 50 ns c sda fall time at 3ma sink i and 400pf load ? ? 80 ns c sda rise time scl fall/rise time ? ? ? ? 300 300 ns ns c c pulse width of spikes suppressed by the input filter ? ? 50 ns c tbuf ssda ... ... ack thd;dat tsu;dat tsu;sto thd;sta tack:low start stop sscl scl sda tsu;sta chip address scl sda thd;sto start stop
20 MC44BC373/3b/4/4b technical data motorola high-speed i 2 c compatible bus 13.3 levels definition 13.4 high-speed i 2 c compatible bus format 13.5 i 2 c write mode format and bus receiver the bus receiver operates the i 2 c compatible data format. the chip address (i 2 c bus) is: in write mode, each ninth data bit (bits 9, 18, 27, 36, and 45) is an acknowledge bit (ack) during which the mcu sends a logic 1 and the modulator circuit answers on the data line by pulling it low. besides the chip address, the circuit needs two or four data bytes for operation. the following data byte sequences are the permitted incoming information: after the chip address, two or four data bytes may be received. if three (3) data bytes are received, the third one is ignored. if five (5) or more data bytes are received, the fifth and following ones are ignored, and the last ack pulse is sent at the end of the fourth data byte. 11001010 (ack)=$ca(hex)inwritemode example 1 sta ca c1 c0 sto example 2 sta ca fm fl sto example 3 sta ca c1 c0 fm fl sto example 4 sta ca fm fl c1 c0 sto with: sta = start condition ca = chip address fm = frequency information, high order bits fl = frequency information, low order bits c1 = control information, high order bits co = control information, low order bits sto = stop condition sda ... 0v vcc vih vil dead band 1 2 3 4 5 6 7 8 9 10 14 11 12 13 45 44 15 19 16 17 18 sta chip address ($ca) ack ack first data byte (c1 or fm) data ack stop scl sda
high-speed i 2 c compatible bus motorola MC44BC373/3b/4/4b technical data 21 the first and third data bytes contain a function bit which lets the ic distinguish between frequency information and control information. if the function bit is a logic 1, the two following bytes contain control information. the first data byte after the chip address may be byte co or byte fm. the two bytes of frequency information are preceded by a logic 0. 13.6 i 2 c read mode format the chip address (i 2 c) is: the incoming information consists of the read mode chip address byte. the device then answers with an ack followed by one byte containing three bits of status information. no acknowledge is answered by the modulator after this byte. 11001011 (ack)=$cb(hex)inreadmode
22 MC44BC373/3b/4/4b technical data motorola application and case diagrams 14 application and case diagrams proposed bicmos modulator and booster/splitter application figure 12. proposed bicmos modulator and booster/splitter application 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 11 12 14 13 scl sda 4mhz vcc tvout vcrtu auxin pre-em antin oo o o o o o gndd vccd pllflt vcrvcc gnd vcrtu tvovcc gnd audio ant2 ant1 gnd xtal sda scl lop preem tvout gnd vcca auxin spllflt vcci video audio o video o lop o 1nf 10nf 100nf 15k 220nf 1nf 1nf 1nf 10nf 100nf note 1 22nf 10nf 470pf vcc o 1nf 75 this document contains information on a new product under development. motorola reserves the right to change or discontinue this product without notice. note 1: cx value depends on crystal characteristics; cx = 27pf on motorola application board. cx note 2: loop filter components must be as close as possible to pins 22 and 23. 22nf 2.2k 47nf note 2
application and case diagrams motorola MC44BC373/3b/4/4b technical data 23 figure 13. so24 package dim millimeters inches min max min max a 15.25 15.54 0.601 0.612 b 7.40 7.60 0.292 0.299 c 2.35 2.65 0.093 0.104 d 0.35 0.49 0.014 0.019 f 0.41 0.90 0.16 0.035 g 1.27 bsc 0.050 bsc j 0.23 0.32 0.009 0.013 k 0.13 0.29 0.005 0.011 m 0 o 8 o 0 o 8 o p 10.05 10.55 0.395 0.415 r 0.25 0.75 0.010 0.029 note: 1. dimensioning and tolerancing per ansi y14.5m, 1982. note: 2. controlling dimension: millimeters. note: 3. dimensions a and b do not include mold protrusions. note: 4. maximum mold protrusion is 0.15 (0.006) per side. note: 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.13 (0.005) total in excess of d dimension at maximum material condition. case 751e-04 issue e
24 MC44BC373/3b/4/4b technical data motorola application and case diagrams dim millimeters inches min max min max a 7.70 7.90 0.303 0.311 b 4.30 4.48 0.169 0.176 c ? 0.95 ? 0.037 d 0.05 0.15 0.002 0.006 f 0.51 0.71 0.020 0.028 g 0.65 bsc 0.026 bsc h 0.27 0.37 0.011 0.015 j 0.09 0.18 0.003 0.007 j1 0.09 0.13 0.003 0.005 k 0.19 0.30 0.007 0.012 k1 0.19 0.25 0.007 0.010 l 6.25 6.50 0.246 0.256 m 0 o 8 o 0 o 8 o note: 1. dimensioning and tolerancing per ansi y14.5m, 1982. note: 2. controlling dimension: millimeters. note: 3. dimensions a and b do not include mold flash or protrusions and are measured at the parting line. mold flash or protrusions shall not exceed 0.15 (0.006) per side. note: 4. dimension is the length of terminal for soldering to a substrate. note: 5. terminal positions are shown for reference only. note: 6. the lead width dimension does not include dambar protrusion. allowable dambar protrusion shall be 0.08 (0.003) total in excess of the lead width dimension at maximum material condition. dambar can not be located on the lower radius or the foot. minimum space between protrusions and adjacent lead to be 0.14 (0.006). case 940h-02 issue a
application and case diagrams motorola MC44BC373/3b/4/4b technical data 25
MC44BC373/d how to reach us: usa/europe/locations not listed: motorola literature distribution; p.o. box 5405, denver, colorado 80217 1-303-675-2140 or 1-800-441-2447 japan: motorola japan ltd.; sps, technical information center, 3-20-1, minami-azabu minato-ku, tokyo 106-8573 japan 81-3-3440-3569 asia/pacific: motorola semiconductors h.k. ltd.; silicon harbour centre, 2 dai king street, tai po industrial estate, tai po, n.t., hong kong 852-26668334 technical information center: 1-800-521-6274 home page: http://www.motorola.com/semiconductors information in this document is provided solely to enable system and software implementers to use motorola products. there are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits or integrated circuits based on the information in this document. motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. ?typical? parameters which may be provided in motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s technical experts. motorola does not convey any license under its patent rights nor the rights of others. motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the motorola product could create a situation where personal injury or death may occur. should buyer purchase or use motorola products for any such unintended or unauthorized application, buyer shall indemnify and hold motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that motorola was negligent regarding the design or manufacture of the part. motorola and the stylized m logo are registered in the u.s. patent and trademark office. all other product or service names are the property of their respective owners. motorola, inc. is an equal opportunity/affirmative action employer. ? motorola, inc. 2002

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