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1/16 STA550 july 2003 n monochip bridge stereo amplifier for bash ? architecture n 55+55w output power @ r l = 4/8 w, thd = 0.5% n 70+70w output power @ r l = 4/8 w, thd = 10% n high dynamic preamplifier input stages n external programmable feedback type compressors n ac coupled input to class ab bridge output amplifier n precision rectifiers to drive the digital converter n on-off sequence/ timer with mute and standby n proportional over power output current to limit the digital converter n absolute power bridge output transistor power protection n absolute output current limit n integrated thermal protection n power supply over voltage protection n flexiwatt power package with 27 pin n bash? licence required description the STA550 is a fully integrated power module de- signed to implement a bash? amplifier when used in conjunction with stabp01 digital processor. flexiwatt27 70+70w stereo power amplifier block diagram absolute value block output bridge peak/2 detector voltage protection soa detector turn- on/off sequence thermal protection peak/2 detector compressor compressor d g +2 -1 d g + - v/l v/l s1 ict ict absolute value block + - s1 output bridge cd-2 cd+2 stby/mute prot. cd+ cd-1 out1- out1+ cd+1 in_pre1 att_rel1 trk_out thresh att_rel2 in_pre2 pwr_inp1 trk_1 out_ pre1 -vs gnd +vs pwr_inp2 d01au1263 trk_2 out_ pre2 out2- out2+ +2 -1 obsolete product(s) - obsolete product(s)
STA550 2/16 description (continued) notice that normally only one digital converter is needed to supply a stereo or multi-channel amplifier system, therefore most of the functions implemented in the circuit have summing outputs the signal circuits are biased by fixed negative and positive voltages referred to ground. instead the final stag- es of the output amplifiers are supplied by two external voltages that are following the audio signal . in this way the headroom for the output transistors is kept at minimum level to obtain a high efficiency power amplifier. the compressor circuits, one for each channel, performs a particular transfer behavior to avoid the dynamic restriction that an adaptive system like this requires. to have a high flexibility the attack / release time and the threshold levels are externally programmable. the tracking signal for the external digital converter is generated from the absolute value block that rectifies the audio signal present at the compressor output. the outputs of these blocks are decoupled by a diode to permit an easy sum of this signal for the multichannel application. the output power bridges have a dedicated input pin to perform an ac decoupling to cancel the compressor output dc offset. the gain of the stage is equal to 4 (+12db). a sophisticated circuit performs the output transistor pow- er detector that , with the digital converter, reduces the power supply voltage . moreover, a maximum current output limiting and the over temperature sensor have been added to protect the circuit itself. the external volt- age applied to the stby/mute pin forces the two amplifiers in the proper condition to guarantee a silent turn- on and turn-off. absolute maximum ratings note 1: v cd- must not be more negative than -vs and v cd+ must not be more positive than +v s note 2: all pins withstand 2kv esd but not pin 11 symbol parameter value unit +v s positive supply voltage referred to pin 13 (gnd) 30 v -v s negative supply voltage referred to pin 13 (gnd) -24 v v cd+ positive supply voltage tracking rail referred to pin 13 (gnd) 22 v v cd+ positive supply voltage operated to vs+ (1) 0.3 v v cd- negative supply voltage referred to -vs (1) -0.3 v v cd- negative supply voltage tracking rail referred to pin 13 (gnd) -22 v v att_rel1 v att_rel2 pin 3, 25 negative & positive maximum voltage referred to gnd (pin 13) -0.5 to +20 v v pwr_imp1 v pwr_imp2 v tr k _ 1 v tr k _ 2 pin 7, 21, 18, 10 negative & positive maximum voltage referred to gnd (pin 13) -20 to +20 v v in_pre1 v in_pre2 pin 8, 20 negative & positive maximum voltage referred to gnd (pin 13) -0.5 to +0.5 v v threshold pin 17 negative & positive maximum voltage referred to gnd (pin 13) -7 to +0.5 v i stb-max pin 11 maximum input current (internal voltage clamp at 5v) 500 m a v stbymute pin 11 negative maximum vol t age referred to gnd (pin 13) -0.5 v i out output current 7.0 a obsolete product(s) - obsolete product(s)
3/16 STA550 figure 1. connection diagram between STA550 and stabp01 absolute value block output bridge peak/2 detector voltage protection soa detector turn- on/off sequence thermal protection peak/2 detector compressor compressor d g +2 -1 d g + - v/l v/l s1 ict ict absolute value block + - s1 output bridge cd-2 cd+2 stby/mute prot. protection cd+ cd-1 out1- out1+ cd+1 in_pre1 att_rel1 trk_out thresh att_rel2 in_pre2 pwr_inp1 trk_1 out_ pre1 -vs gnd +vs pwr_inp2 d02au1391 trk_2 out_ pre2 out2- out2+ +2 -1 + - + + - - - - + + + - r 1v 1v 10v 1v cd+ gate 10pf 2200pf 680pf 2.67k 10k 4.99k 2k 499k 680pf other sta575 trk-out 100k 1k output ground1 soft sw reset s 1v 10v 2r r 1v comp/3 1v 1v - + - + - + buffer r17 - - + + current sense comparator one shot signal open drain output discharge (reset) transistor fast attack control error amp comp current_sense v fb v+ power supply1 clock 250hz 1v q q s q r q reset clk q d q reset clk d q q r s q q internal circuit on uvlo: 7v = on 5v = off soft switch pwm latch vref buffer out rec_out buffer in fa in 1v 10v dead time 10v 100pf gnd-audio gnd output ground2 one shot delay power_vs2 - + one shot duty accel +10v emi barrier optional emi barrier optional isense cd+ cd- 6.82k 490 1k i sense r sense r sense 2k 490 protection gate +25v 1v 1v r +10v +25v other sta575 protection 1000pf 2.55k 2.43k 15k 95k stabp01 sta575 10 4 3 19 20 8 3 16 25 20 19 18 21 26 23 24 22 11 12 15 2 4 5 6 13 7 10 9 27 14 17 1 18 15 9 8 7 6 11 12 13 14 16 17 2 5 obsolete product(s) - obsolete product(s)
STA550 4/16 thermal data operating range pin connection symbol parameter value unit t j max junction temperature 150 c r th j_case thermal resistance junction to case .............................. .. max 1 c/w symbol parameter value unit +v s positive supply voltage +20 to +30 v -v s negative supply voltage -10 to -22 v d v s+ delta positive supply voltage 5v (vs+ - vcd+) 10v v v cd+ positive supply voltage tracking rail +3 to 17 v v cd- negative supply voltage tracking rail -17 to -3 v i in_max current at pin in_pre1, in_pre2, related to compressor behaviour -1 to +1 ma peak v trheshold voltage at pin threshold -5 to 0 v t amb ambient temperature range 0 to 70 c i sb_max pin 11 maximum input current (internal voltage clmp at 5v) 200 m a d01au1251 cd-1 -v s att-rel1 out1+ out1- cd+1 pwr_inp1 in_pre1 out_pre1 trk_1 stby/mute protection gnd +v s cd+ trk_out threshold trk_2 out_pre2 in_pre2 pwr_inp2 cd+2 out2- out2+ att_rel2 cd-2 -vs 1 27 obsolete product(s) - obsolete product(s)
5/16 STA550 pin function n name description 1 -vs negative bias supply 2 cd-1 channel 1 time varying tracking rail negative power supply 3 att_rel1 attack release rate for channel 1 4 out1+ channel 1 speaker positive output 5 out1- channel 1 speaker negative output 6 cd+1 channel 1 positive power supply 7 pwr_inp1 input to channel 1 power stage 8 in_pre1 pre-amp input for channel 1 (virtual ground) 9 out_pre1 output channel 1 pre-amp 10 trk_1 absolute value block input for channel 1 11 stby/mute standby/mute input voltage control 12 protection protection signal for stabp01 digital processor 13 gnd analog ground 14 +vs positive bias supply 15 cd+ time varying tracking rail positive power supply 16 trk_out reference output for stabp01 digital processor 17 threshold compressor threshold input 18 trk_2 absolute value block input for channel 2 19 out_pre2 output channel 2 pre-amp 20 in_pre2 pre-amp input for channel 2 (virtual ground) 21 pwr_inp2 input to channel 2 power stage 22 cd+2 channel 2 positive power supply 23 out2- channel 2 speaker negative output 24 out2+ channel 2 speaker positive output 25 att_rel2 attack release rate for channel 2 26 cd-2 channel 2 time varying tracking rail negative power supply 27 -vs negative bias supply obsolete product(s) - obsolete product(s)
STA550 6/16 electrical characteristcs (test condition: vs+ = 26v, vs- = -22v, v cd+ = 17v, v cd- = -17v, r l = 8 w , external components at the nominal value f = 1khz, tamb = 25c unless otherwise specified symbol parameter test condition min. typ. max. unit preamplifier and compressor v out clamp maximum voltage at out_pre pin 10 11 12 vpeak i in audio input current 0.8 ma v control voltage at attack_release pin attenuation = 0db attenuation = 6db attenuation = 26db 0.35 6 0 0.5 9 0.65 12 v v v vc omp_ th input voltage range for the compression -5 -1 v z th input impedance of threshold pin 100 k w voffset output offset at out_pre pin with: v crt = 0v; attenuation = 0db v crt = 0.5v; attenuation = 6db v crt = 9v; attenuation = 26db -10 -250 -450 10 250 450 mv mv mv thd distortion at out_pre: v crt = 0v; attenuation = 0db v crt = 0.5v; attenuation = 6db v crt = 9v; attenuation = 26db 0.01 5 5 % % % en noise at out_pre pin : v crt = 0v; attenuation = 0db v crt = 0.5v; attenuation = 6db v crt = 9v; attenuation = 26db 10 (2) 50 60 m v m v m v i ct attack time current at pin attack_release 1.5 ma 1. this value is due to the thermal noise of the external resistors r r and r i . tracking parameters g trk tracking reference voltage gain 13 14 15 v v trk_out tracking ref. output voltage 0 20 v i trk_out current capability 5 6 7 ma z trk_in input impedance (t rk1/2 )1m w output bridge g out half output bridge gain 5.5 6 6.5 db g ch output bridge differential gain 11 12 13 db d g ch output bridges gain mismatch -1 1 db p out continuous output power thd = 0.5% thd = 10% 50 64 55 70 w w thd = 10%; r l = 4 w ; v cd+ = 13v; v cd- = -13v; v s+ = 20v; v s- = -20v 64 70 w thd total harmonic distortion of the output bridge po = 5w 0.01 % f = 20hz to 20khz; po = 30w 0.1 % v off output bridge d.c. offset 50 mv obsolete product(s) - obsolete product(s)
7/16 STA550 en noise at output bridge pins f = 20hz to 20khz; rg = 50 w 12 m v z br_in input impedance 100 140 180 k w r dson output power rdson i o = 1a 200 400 m w olg open loop voltage gain 100 db gb unity gain bandwidth 1.4 mhz sr slew rate 7v/ m s protection v stby stby voltage range 0 0.8 v v mute mute voltage range 1.6 3 v v play play voltage range 4 5 v t h1 first over temperature threshold 130 c t h2 second over temperature threshold 150 c unbal. ground upper unbalancing ground threshold referred to (cd + - cd - )/2 5v unbal. ground lower unbalancing ground threshold referred to (cd + - cd - )/2 -5 v uv th under voltage threshold |vs+| + |vs-| 20 v p d_reg. power dissipation threshold for system regulation i prot = 50 m a; @ vds = 10v 25 31 w p d_max switch off power dissipation threshold @ vds = 10v 48 w i prot protection current slope for pd > pd reg 400 m a/w i lct limiting current threshold 5.5 6 6.5 a i+vs positive supply current stby (vstby/mute pin = 0v) mute (vstby/mute pin = 2.5v) play (vstby/mute pin = 5v no signal) 4 35 35 ma ma ma i-vs negative supply current stby (vstby/mute pin = 0v) mute (vstby/mute pin = 2.5v) play (vstby/mute pin = 5v no signal) 4 35 35 ma ma ma icd+ positive traking rail supply current stby (vstby/mute pin = 0v) mute (vstby/mute pin = 2.5v) play (vstby/mute pin = 5v no signal) 100 110 110 m a ma ma icd- negative traking rail supply current stby (vstby/mute pin = 0v) mute (vstby/mute pin = 2.5v) play (vstby/mute pin = 5v no signal) 100 110 110 m a ma ma symbol parameter test condition min. typ. max. unit electrical characteristcs (continued) obsolete product(s) - obsolete product(s)
STA550 8/16 functional description the circuit contains all the blocks to build a stereo amplifier. each single channel is based on the output bridge power amplifier, and its protection circuit. moreover, the compression function and a signal rectifier are added to complete the circuit. the operation modes are driven by the turn-on/off sequence block. in fact the ic can be set in three states by the stby/mute pin: standby ( v pin < 0.8v), mute (1.6v < v pin < 3v), and play (v pin > 4v). in the standby mode all the circuits involved in the signal path are in off condition, instead in mute mode the circuits are biased but the speakers outputs are forced to ground potential. these voltages can be get by the external rc network connected to stby/mute pin. the same block is used to force quickly the i.c. in standby mode or in mute mode when the i.c. dangerous condition has been detected. the rc network in these cases is used to delay the normal operation restore. the protection of the i.c. are implemented by the over temperature, unbalance ground, output short circuit, under voltage, and output transistor power sensing as shown in the following table: table 1. protection implementation see the power protection paragraph for the details compression an other important function implemented, to avoid high power dissipation and clipping distortion, is the com- pression of the signal input. in fact the preamplifier stage performs a voltage gain equal to 5, fixed by ri and rr external resistor, but in case of high input signal or low power supply voltage, its gain could be reduced of 26db. this function is obtained with a feedback type compressor that , in practice, reduces the impedance of the ex- ternal feedback network. the behavior of compression it's internally fixed but depends from the audio input volt- age signal level, and from the threshold voltage applied to the threshold pin. the attack and release time are programmable by the external rc network connected to the att_rel pins. the constraints of the circuit in the typical application are the following: vthreshold range = -5 to 0 vin peak max = 8v vout peak max = 10v fault type condition protection strategy action time release time chip over temperature tj > 130 c mute fast slow related to turn_on sequence chip over temperature tj > 150 c standby fast slow, related to turn_on sequence unbalancing ground |vgnd| > ((cd+) - (cd-))/2 + 5v standby fast slow, related to turn_on sequence short circuit iout > 6a standby fast slow, related to turn_on sequence under voltage |vs+| + |vs-|< 20v standby fast slow, related to turn_on sequence extra power dissipation at output transistor pd tr. >25w reducing digital converter output voltage. related to the digital converter related to the digital converter maximum power dissipation at output transistor pd tr. > 48w standby fast slow, related to turn_on sequence obsolete product(s) - obsolete product(s)
9/16 STA550 gain without compression (g) = 5 max attenuation ratio = 26 db the following graph gives the representation of the compressor activation status related to the vthreshold and the input voltage. the delimitation line between the two fields, compression or not, is expressed by the formula : where g is the preamplifier gain without compression. in the compression region the gain of the preamplifier will be reduced (g = 2vthreshold/vin) to maintain at steady state the output voltage equal 2*|vthreshold| . instead in the other region the compressor will be off (g = 5). the delimitation line between the two fields can be related to the output voltage of the preamplifier: in this case the formula is : figure 2. compressor activation field the relative attenuation introduced by the variable gain cell is the following : the total gain of the stage will be: gdb = 20log5 + attenuation the maximum input swing is related to the value of input resistor, to guarantee that the input current remain under iin_max value (1 ma). v in 2vthreshold g ------------------------------------------ - = v out 2vthreshold = 1 2 4 6 8 2345 g = 5 |vthreshold| v in peak compression g < 5 d01au1264 attenuation 20 2 5 -- - log v th v in_peak --------------------- - = r i v in_peak i in_max --------------------- - > obsolete product(s) - obsolete product(s)
STA550 10/16 figure 3. compressor attenuation vs. input amplitude absolute value block the absolute value block rectifies the signal after the compression to extract the control voltage for the external digital converter. the output voltage swing is internally limited, the gain is internally fixed to 14. the input impedance of the rectifier is very high , to allow the appropriate filtering of the audio signal before the rectification (between out_pre and trk pins). output bridge the output bridge amplifier makes the single-ended to differential conversion of the audio signal using two power amplifiers, one in non-inverting configuration with gain equal to 2 and the other in inverting configuration with unity gain. to guarantee the high input impedance at the input pins, pwr_inp1 and pwr_inp2, the second amplifier stages are driven by the output of the first stages respectively. power protection to protect the output transistors of the power bridge a power detector is implemented (fig 3). the current flowing in the power bridge and trough the series resistor rsense is measured reading the voltage drop between cd+1 and cd+. in the same time the voltage drop on the relevant power (vds) is internally mea- sured. these two voltages are converted in current and multiplied: the resulting current , ipd, is proportional to the instantaneous dissipated power on the relevant output transistor. the current ipd is compared with the ref- erence current ipda, if bigger (dissipated power > 25w) a current, iprot, is supplied to the protection pin. the aim of the current iprot is to reduce the reference voltage for the digital converter supplying the power stage of the chip, and than to reduce the dissipated power. the response time of the system must be less than 200 m sec to have an effective protection. as further protection, when ipd reaches an higher threshold (when the dissipated value is higher then 48w) the chip is shut down, forcing low the stby/mute pin, and the turn on sequence is restarted. 1 -24 -18 -12 -6 0 2345 6 7 8 |vinpk| attenuation(db) d01au1265 |vth=1| |vth=2.5| |vth=5| obsolete product(s) - obsolete product(s)
11/16 STA550 figure 4. power protection block diagram in fig. 4 there is the power protection strategy pictures. under the curve of the 25w power, the chip is in normal operation, over 48w the chip is forced in standby. this last status would be reached if the digital converter does not respond quikly enough reducing the stress to less than 48w. the fig.5 gives the protection current, iprot, behavior. the current sourced by the pin prot follows the formula: for p d < p d_av_th the i prot = 0 independently of the output voltage, the chip is also shut down in the folowing conditions: when the currentthrough the sensing resistor, r sense , reaches 6a (voltage drop (cd+) - (cd+1) = 700mv). when the average junction temperature of the chip reaches 150c. when the ground potential differ from more than 5v from the half of the power supply voltage, ((cd+)-(cd-))/2 when the sum of the supply voltage | vs+ | + |vs-| <20v the output bridge is muted when the average junction temperature reaches 130c. x v/i iload i_pd r sense multiplier ilim current comp current comp oc1 pdp1 iprot to turn-on/off sequence to turn-on/off sequence to prot pad d01au1266 ipdp ipda ipd ipd v/i opa out1- out1+ opa cd- cd+ cd+1 i prot p d p d_av_th ) C ( 510 4 C 1.25v ----------------------------------------------------------------- - o obsolete product(s) - obsolete product(s)
STA550 12/16 figure 5. power protection threshold figure 6. protection current behaviour 4 10 20 30 40 vds ( v ) ids ( ma ) 6 pd_re g = 25w pd_max = 48w ilim = 6a standb y buck limitation normal operation 2 10 10 20 20 30 40 50 60 pd(w) iprot(ma) d01au1306 iprot slope=0.4ma/w figure 7. test and application circuit input1 in_pre1 out_pre1 out1+ out1- stby/ mute trk_1 pwr_inp1 att_rel1 cd+1 cd+ cd+ cd+2 r1 r5 r16 r17 r24 c3 c12 c7 c17 c1 r14 r13 5v r15 mute stby c9 c5 r3 r9 r7 r11 input2 in_pre2 out_pre2 trk_2 pwr_inp2 att_rel2 r2 r6 c4 c8 c16 c2 c6 r4 r10 r8 r12 +v s +v s -v s -v s -v s gnd r22 r20 c13 d1 c14 c15 c10 c11 cd-1 trk-out prot thresh prot thresh trk-out cd-2 cd- r19 r18 out2+ out2- d01au1267 8 9107 4 5 24 11 23 25 20 19 18 21 3 6 15 22 14 13 27 1 26 2 16 12 17 obsolete product(s) - obsolete product(s)
13/16 STA550 external components note: vcontrol is the voltage at att_rel pin. name function value formula ri r1 = r2 input resistor 10k w (|g| = 5, rr = 50k w ) rr r3 = r4 feedback resistor 50k w (|g| = 5, ri = 10k w cac c1 = c2 ac decoupling capacitor 100nf (fp = 16hz, rac =100k w ) cct c3 = c4 capacitor for the attack time 2.2 m f (tattack = 13msec, vcontrol = 9v, ict = 1.5ma) r5 = r6 release constant time resistor 470k w ( t = 1 sec. , cct = 2.2 m f ) r7 = r8 resistor for tracking input voltage filter 10k w r9 = r10 resistor for tracking input voltage filter 56k w r11 = r12 resistor for tracking input voltage filter 10k w c5 = c6 capacitor for tracking input voltage filter 1nf c7 = c8 dc decoupling capacitor 1 m f r13 bias resistor for stby/mute function 10k w r14 stby/mute constant time resistor 30k w r15 mute resistor 30k w c9 capacitor for stby/mute resistor 2.2 m f r16 = r17 sensing resistor for soa detector 120m w 5% 4w r18 conversion resistor for threshold voltage 100k w c10 = c11 power supply filter capacitor 100nf r22 = r24 centering resistor 400 w , 1w c12 = c13 tracking rail power supply filter 680nf r19 protection 1k w r20 trk_out 40k w c14 = c15 power supply filter capacitor 470 m f , 63v c16 = c17 feedback capacitor 100pf d1 schottky diode sb360 r i rr g ------- = rr g rr = cac 1 2 p fp rac -------------------------------- - = cct attack ict vcontrol ------------------------ - = rct t cct --------- = obsolete product(s) - obsolete product(s)
STA550 14/16 application hints preamplifier and compressor in the application circuit showed in figure 7, r 1 /r 3 (or r 2 /r 4 ) ratio fix the gain of the preamplifier. if the input signal is very low, is possible to increase the gain fixing the product vin * g = cost. in that case is possible to increase g decreasing r 1,2 from 10k w until 2k w without relevant effetcs on the cir- cuitbehavior and remaining in the operating range i in_max = v in_max /r 1(2) ,<1ma. so it is possible to increase the preamplifier gain until 25. if no compression is present (equivalnt compressor gm=0), the effects are: C the output voltage offset increase C the snr decrease the following table shows these variations: r 3(4) = 50k w and all the other external components are the same attenuation = 0 db if the compression is active the circuit behaviour is the same. its also possible to eliminate the compressor. in this case the att_rel (1,2) pin must be connected to gnd. stby-mute circuit in the suggested application circuit (figure 7), the resistor for standby/mute function (r 13 ) is connected between the standby/mute switches and 5v supply. it is possible to connect the resistor to another supply voltage level v l , but in that case also the resistor value (r 13,14 ) must be changed according to the following formula (fixing v stby/mute = 2.5v and r 15 = 10k w ): headroom in the suggested application circuit the supply voltage to obtain 75w (power output) on 8 w (r load ) is: it is also possible to increase the systems efficiency forcing the headroom to follow the output signal (variable drop insteadof a constant drop). in that case: r 1,2 v in max g v offset en 10k w 8v 5 15mv 10 m v 5k w 4v 10 30mv 13 m v 2k w 1.6v 25 75mv 20 m v r 13 4v l 10 C () k w = r 14 4v l 10 + () k w = v supply d vi lmax , r dson + = v supply d vi l v () r dson + = obsolete product(s) - obsolete product(s)
15/16 STA550 outline and mechanical data dim. mm inch min. typ. max. min. typ. max. a 4.45 4.50 4.65 0.175 0.177 0.183 b 1.80 1.90 2.00 0.070 0.074 0.079 c 1.40 0.055 d 0.75 0.90 1.05 0.029 0.035 0.041 e 0.37 0.39 0.42 0.014 0.015 0.016 f (1) 0.57 0.022 g 0.80 1.00 1.20 0.031 0.040 0.047 g1 25.75 26.00 26.25 1.014 1.023 1.033 h (2) 28.90 29.23 29.30 1.139 1.150 1.153 h1 17.00 0.669 h2 12.80 0.503 h3 0.80 0.031 l (2) 22.07 22.47 22.87 0.869 0.884 0.904 l1 18.57 18.97 19.37 0.731 0.747 0.762 l2 (2) 15.50 15.70 15.90 0.610 0.618 0.626 l3 7.70 7.85 7.95 0.303 0.309 0.313 l4 5 0.197 l5 3.5 0.138 m 3.70 4.00 4.30 0.145 0.157 0.169 m1 3.60 4.00 4.40 0.142 0.157 0.173 n 2.20 0.086 o 2 0.079 r 1.70 0.067 r1 0.5 0.02 r2 0.3 0.12 r3 1.25 0.049 r4 0.50 0.019 v 5? (typ.) v1 3? (typ.) v2 20? (typ.) v3 45? (typ.) (1): dam-bar protusion not included (2): molding protusion included flexiwatt27 (vertical) h3 r4 g v v g1 l2 h1 h f m1 l flex27me v3 o l3 l4 h2 r3 n v2 r r2 r2 c b l1 m r1 l5 r1 r1 e d a v1 v1 7139011 pin 1 obsolete product(s) - obsolete product(s)
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics a 2003 stmicroelectronics - all rights reserved is the registered trademark and patented technology of indigo manufacturing inc. stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malt a - morocco - singapore - spain - sweden - switzerland - united kingdom - united states.. http://www.st.com 16/16 STA550 obsolete product(s) - obsolete product(s)

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