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TA8874Z 2001-01-15 1/14 toshiba bipolar linear integrated circuit silicon monolithic TA8874Z sound multiplex broadcast demodulator ic for domestic tv / vtr the TA8874Z stores a function necessary for demodulating domestic tv sound multiplex broadcast and trap for eliminating facsimile broadcasting signals that superimpose within the sound multiplex broadcast bandwidth. furthermore no adjustment other than separation is necessary by using a 32f h oscillation. using an i 2 c bus it switches an output mode and performs separation adjustment and broadcast mode read out. features band pass filter for sub audio signal fm demodulator for sub audio signal stereo matrix main / sub de-emphasis output for stereo / bilingual indication trap for facsimile broadcast (4.5f h , 6f h ) various controls by i 2 c bus weight: 1.0 g (typ.) ? toshiba is continually working to improve the quality and reliability of its products. nevertheless, semiconductor devices in g eneral can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. it is the responsibi lity of the buyer, when utilizing toshiba products, to comply with the standards of safety in making a safe design for the entire system, a nd to avoid situations in which a malfunction or failure of such toshiba products could cause loss of human life, bodily injury o r damage to property. in developing your designs, please ensure that toshiba products are used within specified operating ranges as set forth in the most recent toshiba products specifications. also, please keep in mind the precautions and conditions set forth in the ?handlin g guide for semiconductor devices,? or ?toshiba semiconductor reliability handbook? etc.. ? the toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). these toshiba products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfun ction o r failure of which may cause loss of human life or bodily injury (?unintended usage?). unintended usage include atomic energ y control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion cont rol instruments, medical instruments, all types of safety devices, etc.. unintended usage of toshiba products listed in this docume n t shall be made at the customer?s own risk. ? the products described in this document are subject to the foreign exchange and foreign trade laws. ? the information contained herein is presented only as a guide for the applications of our products. no responsibility is assume d b y toshiba corporation for any infringements of intellectual property or other rights of the third parties which may result from i ts use. no license is granted by implication or otherwise under any intellectual property or other rights of toshiba corporation o r others. ? the information contained herein is subject to change without notice. 000707 eba1
TA8874Z 2001-01-15 2/14 block diagram
TA8874Z 2001-01-15 3/14 terminal interface circuit
TA8874Z 2001-01-15 4/14
TA8874Z 2001-01-15 5/14
TA8874Z 2001-01-15 6/14 i 2 c bus address map slave address write 84 (hex) read 85 (hex) characteristic sub address data msb lsb default note write mode select ?? led ste led bil lde ext mono set mute f mono mode sub mode main 8 (10) separation adjustment ?? t1 (*) 6 bit 22 (10) read ident of broad cast mode mode output b1 b0 chag flag ???? *: this bit is for testing mode. this bit must be ?0? at any time. data format write mode s slave address 0 a mode select a separation adjustment a p or s slave address 0 a mode select a p read mode s slave address 1 a data a p
TA8874Z 2001-01-15 7/14 control bit map output signal output signal broad cast mode led ste led bil led ext mono set mute f mono mode sub mode main l r l l+r l+r mono h mute mute l l l l r l h l+r l+r h mute mute stereo h l l+r l+r l l l l main main l l l h main main l l h l sub sub l l h h main sub h mute mute bil h l main main led mode led broad cast mode led ste led bil led ext mono set mute f mono mode sub mode main ste bil l ? ? l l h ? ? l h h ? o h l h o ? mono h h h ? ? l l l o ? l l h ? ? l h ? ? l l h ? ? l h h ? o h l h o ? stereo h h h ? ? l l ? o l h ? ? l l h ? ? l h h ? o h l h o ? bil h h h ? ? mode output ident of broad cast mode broad cast mode led ste led bil led ext mono set mute f mono mode sub mode main b1 b0 mono l h stereo l l bil h l
TA8874Z 2001-01-15 8/14 i 2 c bus controlled format summary (1) start and stop condition (2) bit transfer (3) acknowledge (4) slave address a6 a5 a4 a3 a2 a1 a0 w / r 1 0 0 0 0 1 0 1 / 0 purchase of toshiba i 2 c components conveys a license under the philips i 2 c patent rights to use these components in an i 2 c system, provided that the system conforms to the i 2 c standard specification as defined by philips.
TA8874Z 2001-01-15 9/14 maximum ratings (ta = 25c) characteristic symbol rating unit power supply voltage v cc 15 v power dissipation p d (note 1) 890 mw operating temperature t opr ? 20~65 c storage temperature t stg ? 55~150 c note 1: when using the device at above ta = 25c decrease the power dissipation by 7.2mw for each increase of 1c. note 2: these in refards to this, please handle with care. recommended supply voltage pin no. pin name min typ. max unit 14 v cc9v 8.1 9.0 9.9 v 18 v cc5v 5.0 5.6 6.2 v electrical characteristics (unless otherwise specified, v cc = 9v, ta = 25c) dc characteristics characteristic symbol test cir- cuit test condition min typ. max unit i cc14 ? ? 22 32 42 power supply and current i cc18 ? ? 12 18 25 ma v 1 ? ? 3.5 4.5 5.5 v 5 ? ? 3.5 4.5 5.5 v 6 ? ? 3.5 4.5 5.5 v 8 ? ? 2.1 3.1 4.1 v 9 ? ? 2.1 3.1 4.1 v 10 ? ? 1.4 2.4 3.4 v 12 ? ? 3.5 4.5 5.5 v 13 ? ? 2.8 3.8 4.8 v 19 ? ? 3.5 4.5 5.5 v 20 ? ? 3.5 4.5 5.5 terminal voltage v 21 ? ? 4.2 5.2 6.2 v
TA8874Z 2001-01-15 10/14 ac characteristics characteristic symbol test cir- cuit test condition min typ. max unit 2f h (31.5khz) a 2fh ? (note 1) 90 130 170 mv p-p f h (15.7khz) a fh ? (note 2) ? ? ? 14 db 3f h (47.2khz) a 3fh ? (note 3) ? ? ? 6 db 3.5f h (55.07khz) a 3.5fh ? (note 4) ? ? ? 24 db 4.5f h (70.8khz) a 4.5fh ? ? (note 5) ? ? ? 20 db 6f h (94.4khz) a 6fh ? (note 6) ? ? ? 26 db output (l, r) mono sub v tv ? 500 650 800 mv rms output level discrepancy (l, r) ? v tv ? (note 7) sub : v 4 = 5v ? 1.5 0 1.5 db output frequency characteristicl, r (m, s) 100hz a tv .l ? (note 8) sub : v 4 = 5v 0 0.9 2.5 db output frequency characteristicl, r (mono) 10khz a tv.h.m ? (note 9) ? ? 16 ? 13 ? 10 db output frequency characteristicl, r (sub) 10khz a tv.h.s ? (note 10) v 4 = 5v ? 16 ? 13 ? 10 db distortion factor output mono (l, r) thd tv-m ? (note 11) ? 0.2 1.1 % distortion factor output sub (l, r) thd tv-s ? (note 12) v 4 = 5v ? 1.5 3.5 % s / n mono (l, r) s / n tv-m ? (note 13) 60 70 ? db s / n sub (l, r) s / n tv-s ? (note 14) v 4 = 5v 60 65 ? db cross talk m s cr tv.ms ? (note 15) v 4 = 5v 60 70 ? db cross talk s m cr tv.sm ? (note 16) v 4 = 0v 60 70 ? db remaining carrier main v sub.m ? (note 17) v 4 = 0v ? 40 70 mv p-p remaining carrier sub v sub.s ? (note 18) v 4 = 5v ? 130 160 mv p-p stereo separation se tv ? (note 19) 34 ? ? db q signal am detection v q ? (note 20) 300 ? ? mv p-p q signal sensitivity s q ? (note 21) 14 ? ? db mute after sound output v tv mut ? (note 22) v 7 = 5v ? ? 1.5 mv p-p mute dc offset output v off tv mut ? (note 23) v 7 = 0 5v ? 5 100 mv mute on voltage v mut on ? (note 24) v 7 = 0~5v ? 1.75 2.0 v input impedance mpx r in ? input resistance of pin 12 5 10 15 k ? output impedance r out ? output resistance of pins 8 and 9 ? 500 ? ? q signal interference elimination efficiency av q ? (note 25) 5 10 ? db
TA8874Z 2001-01-15 11/14 measurement condition note input signal filter applied voltage measure- ment pin measurement method 1 31.5khz, 50mv p-p cw ? ? v 13 measure output signal amplitude exclusive of pin 13 external capacitance. 2 15.75khz, 50mv p-p cw 3 47.2khz, 50mv p-p cw 4 55.07khz, 50mv p-p cw 5 70.8khz, 50mv p-p cw 6 94.4khz, 50mv p-p cw ? ? v 13 set 2f h level to 0db reference. 7 mono : 400hz, 250mv rms sub : 400hz, 150mv rms , 100% modulation bil.q signal 15khz lpf sub : v 4 = 5v v 8 , v 9 output : measure v 8 and 9 output level. output level difference : 20 og l (v 8 / v 9 ) 8 mono : 100hz, 250mv rms sub : 100hz, 150mv rms 100% modulation bil.q signal sub : v 4 = 5v 9 mono : 10khz, 250mv rms ? 10 sub : 10khz, 150mv rms , 100% modulation bil.q signal 15khz lpf v 4 = 5v v 8 , v 9 measure level at 1khz first and compare to its level. 11 mono : 1khz, 250mv rms ? v 8 , v 9 measure distortion factor of output. 12 sub : 1khz, 150mv rms , 100% modulation 15khz lpf v 4 = 5v v 8 , v 9 measure distortion factor of output. 13 mono : 1khz, 250mv rms ? v 8 , v 9 compare when no signal. 14 sub : 1khz, 150mv rms , 100% modulation 15khz lpe v 4 = 5v v 8 , v 9 compare when no signal. 15 mono : 1khz, 250mv rms v 4 = 5v v 8 , v 9 measure output leakage signal in sub mode. 16 sub : 1khz, 150mv rms , 100% modulation 1khz bpf v 4 = 0v v 8 , v 9 measure output leakage signal in main mode. 17 sub carrier, bil.q signal ? v 4 = 0v v 8 , v 9 measure residual carrier (31.5khz) 18 sub carrier, bil.q signal ? v 4 = 5v v 8 , v 9 measure residual carrier (63.0khz) 19 only r-ch 100% modulation, ste.q signal 1khz bpf ? v 8 , v 9 measure comparison with signal outputted to l when r is 1. 20 bil.q signal ? ? v 1 measure 922.5hz detection output. 21 bil.q signal ? ? 18pin led measure level difference until pin 18 led lamp extinguishes, lowering level from 56.6mvp-p.
TA8874Z 2001-01-15 12/14 note input signal filter applied voltage measure- ment pin measurement method 22 mono : 1khz, 250mv rms 1khz bpf v 7 = 5v v 8 , v 9 measure signal outputted when muting. 23 ? ? v 7 = 0 5v v 8 , v 9 measure voltage change of output when v 7 = 0 is changed to 5v. 24 mono : 1khz, 250mv rms ? v 7 = 0 ~ 5v v 8 , v 9 measure voltage that v 8 and 9 output signal is lower than 1mv p-p , raising v 7 gradually from 0v. 25 sub : 1khz, 150mv rms , 100% modulation bil.q signal ? ? v 1 compare level when only sub signal to level when only bil.q signal. (input signal) bil.q signal : carrier 55.07khz, modulation frequency 922.5hz, 60% am modulation, 56.6mv p-p ste.q signal : carrier 55.07khz, modulation frequency 982.5hz, 60% am modulation, 56.6mv p-p sub signal : carrier 31.5khz, fm modulation, 150mv rms (filter) l.p.f . : biquadratic batterworth 15khz b.p.f. : quadratic 1khz, bandwidth 200hz ? : through unless otherwise specified.
TA8874Z 2001-01-15 13/14 test circuit ceramic resonator : csb503-e7 (murata mfg. co., ltd.)
TA8874Z 2001-01-15 14/14 package dimensions weight: 1.0 g (typ.)

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