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1 features ? dc characteristic adjustable transmit and receive gain adjustable symmetrical input of microphone amplifier anti-clipping in transmit direction automatic line-loss compensation built-in ear protection dtmf and mute input adjustable sidetone suppression independent of sending and receiving amplification integrated amplifier for loudhearing operation anti-clipping for loudspeaker amplifier improved acoustical feedback suppression selectable line impedance voice switch supply voltages for all functional blocks of a subscriber set operation possible from 10-ma line current filters against emi on critical i/o benefits complete system integration of analog signal processing on one chip very few external components less components for emi protection applications feature phones answering machines fax machines speaker phones description the telephone circuit u4089b-p is a linear integrated circuit for use in feature phones, answering machines and fax machines. it contains the speech circuit, sidetone equivalent and ear protection rectifiers. the circuit is line-powered and contains all components necessary for the amplification of signals and adaptation to the line. an integrated voice switch with loudspeaker amplifier enables loudhearing or hands- free operation. with an anti-feedback function, acoustical feedback during loud- hearing can be reduced significantly. the generated supply voltage is suitable for a wide range of peripheral circuits. electrostatic sensitive device. observe precautions for handling. monolithic integrated feature phone circuit u4089b-p rev. 4518a ? cord ? 05/02
2 u4089b-p 4518a ? cord ? 05/02 figure 1. simple block diagram figure 2. block diagram speech circuit audio amplifier voice switch dialer acoustical feedback suppression control 27 26 29 28 25 mic 4 3 1 tx acl 41 sacl 11 21 transmit mute control 23 txa aga control r- attenuation current supply power supply 13 10 9 6 30 7 32 44 supply 24 22 39 40 36 42 mic1 mic2 dtmf ttxa inldr inldt tldr tldt atafs sao tsacl sai gsa mutx reco gr sti recin v l sto gt aga ind sense v b v mp i ref gnd v m 600 ? 900 ? 20 impsel impedance control 31 8 33
3 u4089b-p 4518a ? cord ? 05/02 pin configuration figure 3. pinning sso44 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 iref aga tldr tldt inldr inldt vm sto atafs nc nc sti mutx sai reco nc nc ttxa gr recin nc gt dtmf nc mic2 mic1 nc ind vl gnd sense vb sao nc vmp nc nc nc nc nc nc impsel tsacl gsa pin description pin symbol function 1 dtmf input for dtmf signals. also used for the answering machine and hands-free input. 3 mic 2 non-inverting input of microphone amplifier. 4 mic 1 inverting input of microphone amplifier. 6ind the internal equivalent inductance of the circuit is proportional to the value of the capacitor at this pin. a resistor connected to ground may be used to reduce the dc line voltage. 7v l line voltage. 8 gnd reference point for dc and ac output signals. 9 sense a small resistor (fixed) connected from this pin to v l sets the slope of the dc characteristic and also affects the line-length equalization characteristics as well as the line current at which the loudspeaker amplifier is switched on. 10 v b unregulated supply voltage for peripheral circuits (voice switch); limited to typically 7 v. 11 sao output of loudspeaker amplifier. 13 v mp regulated supply voltage 3.3 v for peripheral circuits. the maximum output current is 2 ma. 20 impsel control input for selection of line impedance 1) 600 ? 2) 900 ? 3) mute of second transmit stage (txa); also used for indication of external supply (answering machine); last chosen impedance is stored. 21 tsacl time constant of anti-clipping of speaker amplifier. 22 gsa current input for setting the gain of the speaker amplifier. adjustment characteristic is logarithmical. for rgsa > 2 m ?, the speaker amplifier is switched off. 23 sa i speaker amplifier input (for loudspeaker, tone ringer and hands-free use). note: filters against electromagnetic interference (emi) are located at the pins mic1, mic2, recin and sti.
4 u4089b-p 4518a ? cord ? 05/02 24 mutx three-state input of transmit mute: 1) speech condition; inputs mic1/mic2 active. 2) dtmf condition; input dtmf active. a part of the input signal is passed to the receiving amplifier as a confidence signal during dialing. 3) input dtmf used for answering machine and hands-free use; receive branch is not affected. 25 atafs attenuation of acoustical feedback suppression. maximum attenuation of afs circuit is set by a resistor at this pin. without the resistor, afs is switched off. 26 inldt input of transmit level detector. 27 inldr input of receive level detector. 28 tldt time constant of transmit level detector. 29 tldr time constant of receive level detector. 30 aga automatic gain adjustment with line current. a resistor connected from this pin to gnd sets the starting point. maximum gain change is 6 db. 31 iref internal reference current generation; rref = 62 k ? ; iref = 20 a 32 sto side-tone reduction output. output resistance is approximately 300 ? . maximum load impedance is 10 k ?. 33 v m reference node for microphone-earphone and loudspeaker amplifier. supply for electret microphone (im 300 ma). 36 sti input for side-tone network. 39 reco output of receiving amplifier. 40 g r a resistor connected from this pin to gnd sets the receiving amplification of the circuit; amplifier ra1 can be muted by applying v mp to g r . 41 ttxa time constant of anti-clipping in transmit path. 42 recin input of receiving path; input impedance is typically 80 k ?. 44 g t a resistor from this pin to gnd sets the amplification of microphone and dtmf signals; the input amplifier can be muted by applying v mp to g t . pin description pin symbol function note: filters against electromagnetic interference (emi) are located at the pins mic1, mic2, recin and sti.
5 u4089b-p 4518a ? cord ? 05/02 dc line interface and supply-voltage generation the dc line interface consists of an electronic inductance and an output stage which charges the capacitor at v b . the value of the equivalent inductance is given by: l = r sense c ind (r dc r 30 ) / (r dc + r 30 ) in order to improve the supply during worst-case operating conditions, the pnp current source (i bopt ) supplies an extra amount of current to the supply voltages when the npn in parallel is unable to conduct current. the u4089b-p contains a series regulator which provides a supply voltage v mp of 3.3 v at 2 ma suitable for a microprocessor. figure 4. dc line interface with electronic inductance and generation of regulated and unregulated supply figure 5. functional blocks for power supply - + i bopt < 5 ma 30 k r 30 v offs sense ind r sense 10 10 f r dc c ind v l - + 3.3 v 7 v v mp v b 3.3 v/ 2 ma 47 f 220 f 7v v b mic, dtmf aga, ra tx mute mut rec, stbal recatt afs sal, sa sacl offsa comp txa txacl lidet voltage regulator power supply v l v lon v mp imped contr impsel es
6 u4089b-p 4518a ? cord ? 05/02 1. in speech condition, the system is supplied by the line current. if the lidet-block detects a line voltage above the fixed threshold (1.9 v), the internal signal vlon is activated, thus switching on all blocks of the chip. for line voltages below 1.9 v, the switches remain in their quiescent state as shown in figure 5. offsacomp disables the group listening feature (sai, sa, sacl, afs) below line currents of approximately 10 ma. 2. selecting impsel = high impedance activates all switches at the es line. acoustic feedback suppression acoustical feedback from the loudspeaker to the handset microphone may cause insta- bility in the system. the u4089b-p offers a very efficient feedback suppression circuit which uses a modified voice switch topology. figure 6 shows the basic system configuration. two attenuators (tx att and rx att) reduce the critical loop gain by introducing an externally adjustable amount of loss either in the transmit or in the receive path. the sliding control in block att contr determines whether the tx or the rx signal has to be attenuated. the overall loop gain remains constant under all operating conditions. selection of the active channel is made by comparison of the logarithmically com- pressed tx and rx envelope curves. the system configuration for group listening, which is realized in the u4089b-p, is illus- trated in figure 7. txa and sai represent the two attenuators; the logarithmic envelope detectors are shown in a simplified way (operational amplifiers with two diodes). figure 6. basic voice-switch system handset microphone tx attenuation attenuation control logarithmic hybrid line loud speaker logarithmic rx attenuation
7 u4089b-p 4518a ? cord ? 05/02 figure 7. integration of the acoustic feedback-suppression circuit into the speech circuit environment figure 8. acoustic feedback suppression by alternative control of transmit- and speaker amplifier gain + - vbg afs control inldt tldt max att. aga sto vl + - vbg sai inldr zint reco gt sao tldr sai gr sti gsa z l v l v b recin stn sto txa sai iatgsa aga iagafs igsa tldt inldt inldr rldt rldr atafs gsa tldr ratafs aga
8 u4089b-p 4518a ? cord ? 05/02 a detailed diagram of the afs (acoustic feedback suppression) is given in figure 8. receive and transmit signals are first processed by logarithmic rectifiers in order to pro- duce the speech envelopes at tldt and rldt. after amplification, a decision is made by the differential pair which direction should be transmitted. the attenuation of the controlled amplifiers txa and sai is determined by the emitter current iat which is comprised of three parts: i atafs sets maximum attenuation i atgsa decreases the attenuation when speaker amplifier gain is reduced i agafs decreases the attenuation according to the loop-gain reduction caused by the aga function i at = i atafs - i atgsa - i agafs ? g = i at 0.67 db/ a figure 9 illustrates the principal relationship between speaker amplifier gain (gsa) and attenuation of afs (atafs). both parameters can be adjusted independently, but the internal coupling between them has to be considered. the maximum gsa value to be used is 36 db. the shape of the characteristic is moved in the x-direction by adjusting resistor ratafs, thus changing atafs m . the actual value of the attenuation (atafs a ), however, can be determined by reading the value which belongs to the actual gain gsa a . if the speaker amplifier gain is reduced, the attenuation of afs is automati- cally reduced by the same amount in order to achieve a constant loop gain. zero attenuation is set for speaker gains gsa gsa0 = 36 db - atafs m . figure 9. reducing speaker amplifier gain results in an equal reduction of afs attenuation operating range of speaker amplifier the basic behavior is illustrated in figure 10. actual values of ilon/iloff vary slightly with the adjustment of the dc characteristics and the selection of the internal line impedance. atafs (db) 36 db atafs m atafs a gsa o gsa a gsa (db) not usable ratafs ratafs
9 u4089b-p 4518a ? cord ? 05/02 figure 10. threshold of speaker amplifier figure 11. comparator thresholds depend on dc mask and line impedance il sa on sa off il off il on 3 4 5 6 7 10.0 12.0 14.0 16.0 18.0 20.0 i l ( ma ) rdc = 68 k rdc = rdc = 130 k v l ( v ) = ilon at line impedance = 600 ohm = iloff at line impedance = 600 ohm = ilon at line impedance = 900 ohm = iloff at line impedance = 900 ohm absolute maximum ratings parameters symbol value unit line current i l 140 ma dc line voltage v l 12 v junction temperature t j 125 c ambient temperature t amb - 25 to + 75 c storage temperature t stg - 55 to + 150 c total power dissipation, t amb = 60 c, sso44 p tot 0.9 w esd (human body model), esd s 5.1 standard v esd 1.5 kv esd (machine model), jedec a115a v esd 150 v thermal resistance parameters symbol value unit junction ambient r thja 70 k/w
10 u4089b-p 4518a ? cord ? 05/02 electrical characteristics f = 1 khz, 0 dbm = 775 mv rms , i m = 0.3 ma, i mp = 2 ma, rdc = 130 k ? , t amb = 25 c, rgsa = 560 k, z ear = 68 nf + 100 ? , z m = 68 nf, pin 30 open (aga), v mutx = gnd, see figure 22 (ac tests), unless otherwise specified. parameters test conditions pin symbol min. typ. max. unit dc characteristics (see figure 19) dc voltage drop over circuit i l = 2 ma i l = 14 ma i l = 60 ma i l = 100 ma v l 4.6 8.8 2.4 5.0 7.5 9.4 5.4 10.0 v v v v transmission amplifier, i l = 14 ma, v mic = 2 mv, rgt = 27 k, unless otherwise specified adjustment range of transmit gain g t 40 45 50 db transmitting amplification rgt = 12 k rgt = 27 k g t 47 39.8 48 49 41.8 db frequency response i l 14 ma, f = 300 to 3400 hz ? g t 0.5 db gain change with current pin 30 open (aga), i l = 14 to 100 ma ? g t 0.5 db gain deviation t amb = -10 to +60 c ? g t 0.5 db cmrr of microphone amplifier cmrr 60 80 db input resistance of mic amplifier rgt = 12 k rgt = 27 k r i 45 50 75 110 k ? distortion at line i l > 14 ma v l = 700 mv rms d t 2% maximum output voltage i l > 19 ma, d < 5% v mic = 25 mv ctxa = 1 f v lmax 1.8 3 4.2 dbm noise at line psopho- metrically weighted i l > 14 ma g t = 48 db n o -80 -72 dbmp anti-clipping attack time release time ctxa = 1 f each 3 db overdrive 0.5 9 ms ms gain at low operating current i l = 10 ma i mp = 1 ma rdc = 68 k ? v mic = 1 mv i m = 300 a g t 40 42.5 db distortion at low operating current i l = 10 ma i m = 300 a i mp = 1 ma rdc = 68 k ? v mic = 10 mv d t 5% line-loss compensation i l = 100 ma, raga = 20 k ? ? g ti -6.4 -5.8 -5.2 db mute suppression a) mic muted (microphone preamplifier) i l 14 ma mutx = open g tm 60 80 db
11 u4089b-p 4518a ? cord ? 05/02 receiving amplifier, i l = 14 ma, rgr = 62 k ? , unless otherwise specified, v gen = 300 mv adjustment range of receiving gain i l 14 ma, single-ended g r -8 +2 db receiving amplification rgr = 62 k ? rgr = 22 k ? g r -7.75 -7 1.5 -6.25 db amplification of dtmf signal from dtmf in to reco i l 14 ma v mutx = v mp g rm 147db frequency response i l > 14 ma, f = 300 hz to 3400 hz ? g rf 0.5 db gain change with current i l = 14 to 100 ma ? g r 0.5 db gain deviation t amb = -10 to +60 c ? g r 0.5 db ear protection i l 14 ma v gen = 11 v rms ep 1.1 vrms mute suppression dtmf operation i l 14 ma v mutx = v mp ? g r 60 db output voltage d 2% i l = 14 ma z ear = 68 nf 0.5 v rms maximum output current d 2% z ear = 100 ? 4 ma (peak) receiving noise psophometrically weighted z ear = 68 nf + 100 ? i l 14 ma n i -80 -77 dbmp output resistance output against gnd r o 10 ? line-loss compensation raga = 20 k ? , i l = 100 ma ? g ri -7.0 -6.0 -5.0 db ac impedance z imp 840 900 960 ? gain at low operating current i l = 10 ma i mp = 1 ma i m = 300 a v gen = 560 mv rdc = 68 k ? g r -8 -7 -6 db distortion at low operating current i l = 10 ma i mp = 1 ma v gen = 560 mv rdc = 68 k ? d r 5% speaker amplifier minimum line current for operation no ac signal i lmin 15 ma input resistance 23 14 22 k ? gain from sai to sao v sai = 3 mv, i l = 15 ma, rgsa = 560 k ? rgsa = 20 k ? g sa 35.5 36.5 -3 37.5 db db electrical characteristics (continued) f = 1 khz, 0 dbm = 775 mv rms , i m = 0.3 ma, i mp = 2 ma, rdc = 130 k ? , t amb = 25 c, rgsa = 560 k, z ear = 68 nf + 100 ? , z m = 68 nf, pin 30 open (aga), v mutx = gnd, see figure 22 (ac tests), unless otherwise specified. parameters test conditions pin symbol min. typ. max. unit
12 u4089b-p 4518a ? cord ? 05/02 output power load resistance r l = 50 ? , d < 5% v sai = 20 mv i l = 15 ma i l = 20 ma p sa p sa 37 20 mw mw output noise (input sai open) psopho-metrically weighted i l > 15 ma n sa 200 v psoph gain deviation i l = 15 ma t amb = -10 to +60 c ? g sa 1 db mute suppression i l = 15 ma, v l = 0 dbm, v sai = 4 mv pin 23 open v sao -60 dbm gain change with current i l = 15 to 100 ma ? g sa 1 db resistor for turning off speaker amplifier i l = 15 to 100 ma rg sa 0.8 1.3 2 m ? gain change with frequency i l = 15 ma f = 300 to 3400 hz ? g sa 0.5 db attack time of anti-clipping 20 db over drive t r 5ms release time of anti-clipping t f 80 ms tmf amplifier test conditions: imp = 2 ma, im = 0.3 ma, v mutx = vmp adjustment range of dtmf gain i l = 15 ma mute active g d 40 50 db dtmf amplification i l = 15 ma, vdtmf = 8 mv mute active: mutx = vmp g d 40.7 41.7 42.7 db gain deviaton i l = 15 ma t amb = -10 to +60 c g d 0.5 db input resistance rgt = 27 k ? , rgt = 15 k ? r i 60 26 180 70 300 130 k ? distortion of dtmf signal i l 15 ma v l = 0 dbm d d 2% gain deviation with current i l = 15 to 100 ma ? gd 0.5 db afs acousting feedback suppression range of attenuation i l 15 ma 0 50 db attenuation of transmit gain i l 15 ma, i inldt = 0 a r atafs = 30 k ? i inldr = 10 a ? g t 45 db attenuation of speaker amplifier i l 15 ma i inldp = 0 r atafs = 30 k ? i inldr = 10 ? g sa 50 db afs disable i l 15 ma v atafs 1.5 v electrical characteristics (continued) f = 1 khz, 0 dbm = 775 mv rms , i m = 0.3 ma, i mp = 2 ma, rdc = 130 k ? , t amb = 25 c, rgsa = 560 k, z ear = 68 nf + 100 ? , z m = 68 nf, pin 30 open (aga), v mutx = gnd, see figure 22 (ac tests), unless otherwise specified. parameters test conditions pin symbol min. typ. max. unit
13 u4089b-p 4518a ? cord ? 05/02 supply voltages, v mic = 25 mv, t amb = -10 to +60 c v mp i l = 14 ma, rdc = 68 k ? i mp = 2 ma v mp 3.1 3.3 3.5 v v m i l w 14 ma, i m = 300 a rdc = 130 k ? v m 1.4 3.3 v v b i b = + 20 ma, i l = 0 ma v b 77.6v mutx input (see figure 20) input current v mutx = v mp v mutx = gnd i mutx i mutx +20 -20 +30 -30 a a input voltage input high v mutx v mp - 0.3 v v input low v mutx 0.3 v electrical characteristics (continued) f = 1 khz, 0 dbm = 775 mv rms , i m = 0.3 ma, i mp = 2 ma, rdc = 130 k ? , t amb = 25 c, rgsa = 560 k, z ear = 68 nf + 100 ? , z m = 68 nf, pin 30 open (aga), v mutx = gnd, see figure 22 (ac tests), unless otherwise specified. parameters test conditions pin symbol min. typ. max. unit
14 u4089b-p 4518a ? cord ? 05/02 u4089b-p control afs = acoustical feedback-suppression control aga = automatic gain adjustment txacl = transmit anti-clipping control es = external supply mutx mode 0 mic 1/2 transmit enabled receive enable afs = on aga = on txacl = on speech z dtmf transmit enabled receive enable afs = on aga = on txacl = on for answering machine 1 dtmf transmit enabled dtmf to receive enable afs = off aga = off txacl = off dtmf dialling impsel mode 0 line impedance = 600 ? txa = on es = off speech 0 to z line impedance = 600 ? txa = off es = on transmit mute 1 to z line impedance = 900 ? txa = off es = on transmit mute 1 line impedance = 900 ? txa = on es = off speech logic-level 0 = < (0.3 v) z = > (1 v) < (v mp - 1 v) or (open input) 1 = > (v mp - 0.3 v)
15 u4089b-p 4518a ? cord ? 05/02 figure 12. typical dc characteristic figure 13. typical adjustment range of the transmit gain g t (db) rgt (kohm)
16 u4089b-p 4518a ? cord ? 05/02 figure 14. typical adjustment range of the receive gain figure 15. typical aga characteristic
17 u4089b-p 4518a ? cord ? 05/02 figure 16. typical load characteristic of v b for a maximum (rdc = infinity) dc characteristic and a 3-mw loudspeaker output figure 17. typical load characteristic of v b for a medium dc characteristic (rdc = 130 k ? ) and a 3-mw loudspeaker output
18 u4089b-p 4518a ? cord ? 05/02 figure 18. typical load characteristic of v b for a minimum dc characteristic (rdc = 68 k ? ) and a 3-mw loudspeaker output
19 u4089b-p 4518a ? cord ? 05/02 figure 19. dc voltage absolute gt 44 gt dtmf 1 mic2 mic1 3 4 open idio cmic 68n ind vl gnd sense gsa sao vmp impsel tsacl recin ttxa gr reco sti vm sto iref aga tldr tldt inldr inldt atafs mutx sai vb 6 7 rdc s4 s1 10u cind 8 9 10 10 vb dc ib c b s2a 11 100k 13 rgs rsense rsao rvmp 1.65k 20 dc + vimpsel 21 csacl 1u 42 41 crin 47n ctxa 1u 40 rgr 39 rh 100 ch 68n vl 36 rnw2 3k vm 33 cm 100u im open 32 rref 62k 31 30 raga 29 28 cldr cldt 1n 1n 27 26 2.2n 2.2n 2meg 2meg on adapter cause of stability 25 ratafs 24 vmu tx + dc 23 open 22 rgsa cmp 4.7u s5 il cb
20 u4089b-p 4518a ? cord ? 05/02 figure 20. dc voltage current test gt 44 gt u7 dtmf 1 mic2 mic1 3 4 open cmic 68n ind vl gnd sense gsa sao vmp impsel tsacl recin ttxa gr reco sti vm sto iref aga tldr tldt inldr inldt atafs mutx sai vb 6 7 rdc s1 10u cind 8 9 10 10 vb dc s2 b a 11 100k 13 rgs rsense rsao rvmp 1.65k 20 21 csacl 1u 42 41 crin 47n ctxa 1u 40 rgr 39 rh 100 ch 68n vl 36 rnw2 3k vm 33 cm 100u im 32 rref 62k 31 30 raga 29 28 cldr cldt 1n 1n 27 26 2.2n 2.2n 2meg 2meg on adapter cause of stability 25 ratafs 24 vmu tx + dc 23 open 22 rgsa cmp 4.7u il cb + dc v sacl + isacl s4 dc vtxa itxa s10 + vm s6 s8 istihs dc vsto id c isto s12 dc vaga + + iaga s5
21 u4089b-p 4518a ? cord ? 05/02 figure 21. dc ramps gt 44 gt dtmf 1 mic2 mic1 3 4 open cmic 68n ind vl gnd sense gsa sao vmp impsel tsacl recin ttxa gr reco sti vm sto iref aga tldr tldt inldr inldt atafs mutx sai vb 6 7 rdc s4 10u cind 8 9 10 10 vb dc b a 11 100k 13 rgs rsense rsao vmp 1.65k 20 dc + vimpsel 21 csacl 1u 42 41 crin 47n ctxa 1u 40 rgr 39 rh 100 ch 68n vl 36 rnw2 3k vm 33 cm 100u im offen 32 rref 62k 31 30 raga 29 28 cldr cldt 1n 1n 27 26 2.2n 2.2n 2meg 2meg on adapter cause of stability 25 ratafs 24 vmu tx + dc 23 offen 22 rgsa cmp 4.7u il cb vl dc s2 + + + 4.7u dc s5 a b s4 dc + ilcur s1
22 u4089b-p 4518a ? cord ? 05/02 figure 22. ac tests gt 44 gt dtmf 1 mic2 mic1 3 4 open cmic 68n ind vl gnd sense gsa sao vmp impsel tsacl recin ttxa gr reco sti vm sto iref aga tldr tldt inldr inldt atafs mutx sai vb 6 7 rdc s4 10u cind 8 9 10 10 vb dc b a 11 100k 13 rgs rsense rsao vmp 1.65k 20 dc + vimpsel 21 csacl 1u 42 41 crin 47n ctxa 1u 40 rgr 39 rh 100 ch 68n vl 36 rnw2 3k vm 33 cm 100u im idc open 32 rref 62k 31 30 raga 29 28 cldr cldt 1n 1n 27 26 2.2n 2.2n 2meg 2meg on adapter cause of stability 25 ratafs 24 vmu tx + dc 23 open 22 rgsa il cb vl dc s2 + + + 4.7u dc s5 a b s4 dc + ilcur s1
23 u4089b-p 4518a ? cord ? 05/02 table 1. typical values of external components (see figure 23) name value name value name value name value c 2 4.7 nf c 16 47 f r 3 >68 k ? r 16 1 k ? c 3 10 f c 17 10 f r 4 10 k ? r 17 1.2 k ? c 4 220 f c 18 10 f r 6 62 k ? r 18 30 k ? c 5 47 f c 21 1 f r 8 22 k ? r 21 15 k ? c 7 1 f c 23 6.8 nf r 9 330 k ? r 22 330 k ? c 8 100 f c 24 10 nf r 10 3 k ? r 23 220 k ? c 10 150 nf c 25 100 nf r 11 62 k ? r 24 68 k ? c 11 68 nf c 26 470 nf r 12 30 k ? r 25 2 k ? c 12 33 nf c 27 33 nf r 13 62 k ? r 26 3.3 k ? c 14 100 nf c 28 10 f r 14 120 k ? r 29 1 k ? c 15 1 f r 2 20 k ? r 15 47 k ? r 30 12 k ?
24 u4089b-p 4518a ? cord ? 05/02 figure 23. application for hands-free operation 4 3 m i c r o - p h o n e 1 6 c 3 3 0 4 4 r 1 r 2 6 c 2 4 c 2 5 h f - m i c r 2 4 r 2 5 d t m f c 2 3 v m r 2 3 r 2 2 4 1 c 2 1 2 9 c 1 8 r 3 0 c 2 7 2 7 2 6 r 2 9 r e c o l o g t x 2 8 c 1 7 2 5 c 2 6 r 1 8 1 1 c 1 6 2 1 c 1 5 2 3 c 1 4 2 2 r 1 3 r 1 2 r 1 4 r 1 5 r 1 7 r 1 6 v m p l o u d s p e a k e r 2 4 r 2 r 4 r 3 9 1 0 c 4 3 c 5 1 3 v 7 3 2 3 3 c 8 v m 8 3 1 r 6 c 2 r 1 1 4 0 3 6 r 8 c 1 1 r 9 c 1 2 v m t o p i n 3 2 v m r 1 0 c 2 8 e a r p i e c e 4 2 c 1 0 3 9 v l l o g t x r 2 1 b c 1 7 7 v b h o o k s w i t c h t i p r i n g c 7 u 4 0 8 9 b - p 2 9 m i c r o c o n t r o l l e r v m
25 u4089b-p 4518a ? cord ? 05/02 package information ordering information extended type number package remarks U4089B-PFN sso44 tubes U4089B-PFNg3 sso44 taped and reeled technical drawings according to din specifications package sso44 dimensions in mm 0.25 0.10 0.3 0.8 18.05 17.80 16.8 2.35 9.15 8.65 7.50 7.30 10.50 10.20 0.25 44 23 1 22
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