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the information in this document is subject to change without notice. before using this document, please confirm that this is the latest version. not all devices/types available in every country. please check with local nec representative for availability and additional information. bipolar analog integrated circuits m m m m pc2791tb, m m m m pc2792tb 5 v, super minimold silicon mmic vhf-uhf wideband amplifier 1996, 2000 document no. p11863ej2v0ds00 (2nd edition) date published february 2000 n cp(k) printed in japan data sheet the mark shows major revised points. description the m pc2791tb and m pc2792tb are silicon monolithic integrated circuits designed as 2nd if buffer amplifier for dbs tuners. these ics are packaged in super minimold package which is smaller than conventional minimold. so, in the case of reducing your system size, m pc2791tb and m pc2792tb are suitable. among the 6-pin mini/super- minimold amplifiers, m pc2791tb and m pc2792tb have unique pin locations taken over from conventional 4-pin minimold m pc1675g, m pc1676g and m pc1688g. these ics are manufactured using necs 10ghz f t nesat? ii al silicon bipolar process. this process uses silicon nitride passivation film. the material can protect chip surface from external pollution and prevent corrosion/migration. thus, these ic have excellent performance, uniformity and reliability. features ? high-density surface mounting : 6-pin super minimold package (2.0 1.25 0.9 mm) ? supply voltage : v cc = 4.5 to 5.5 v ? wideband response : m pc2791tb; f u = 1.9 ghz typ. @3 db bandwidth m pc2792tb; f u = 1.2 ghz typ. @3 db bandwidth ? power gain : m pc2791tb; g p = 12 db typ. @f = 500 mhz m pc2792tb; g p = 22 db typ. @f = 500 mhz application ? 400 mhz band 2nd if buffer amplifiers in dbs tuners (2nd frequecy converter block), etc. ordering information part number package marking supplying form m pc2791tb-e3 c2s m pc2792tb-e3 6-pin super minimold c2t embossed tape 8 mm wide. 1, 2, 3 pins face to perforation side of the tape. qty 3kpcs/reel. remark to order evaluation samples, please contact your local nec sales office. (part number for sample order: m pc2791tb, m pc2792tb) caution electro-static sensitive devices
data sheet p11863ej2v0ds00 2 m m m m pc2791tb , m m m m pc2792tb pin connections 4 5 6 3 2 1 (top view) c2s 3 2 1 4 5 6 (bottom view) marking is an example of m pc2791tb caution m m m m pc2791tb, m m m m pc2792tb pin locations are different from the other 6-pin mini/super-minimold amplifiers. product line-up (t a = +25 c, v cc = 5.0 v, z s = z l = 50 w w w w ) part number f u (ghz) p o(sat) (dbm) g p (db) nf (db) i cc (ma) package marking m pc1675g 1.9 +4.0 12 5.5 17 4-pin minimold c1a m pc2791tb 6-pin super minimold c2s m pc1688g 1.1 +4.0 21 4.0 19 4-pin minimold c1c m pc1676g 1.2 +5.0 22 4.5 19 4-pin minimold c1b m pc2792tb 20 3.5 6-pin super minimold c2t remarks typical performance. please refer to electrical characteristics in detail. caution this document is to specified for m m m m pc2791tb and m m m m pc2792tb. for the other part numbers mentioned in this document, the data sheet of each part number should be referred. system application example example of dbs tuners (2nd frequecy converter block) 1st if input from dbs converter pc2712tb m m m m m pc2711tb pc2711tb pc2791tb pc2792tb bpf saw lpf agc amp. pll synth. prescaler fm demo. baseband output osc mix pin no. pin name 1gnd 2gnd 3output 4v cc 5gnd 6 input
data sheet p11863ej2v0ds00 3 m m m m pc2791tb , m m m m pc2792tb pin explanation pin no. pin name applied voltage (v) pin voltage (v) note function and applications internal equivalent circuit 1 2 5 gnd 0 ? ground pin. this pin should be connected to system gr ound with minimum inductance. ground pattern on the board should be formed as wide as possible. all the ground pins must be connected together with wide ground pattern to decrease impedance difference. m m m m pc2791tb 3output ? 3.92 3.96 signal output pin. a internal matching circuit, configured with resistors, enables 50 w connection over a wide band. this pin must be coupled to next stage with capacitor for dc cut. 4v cc 4.5 to 5.5 ? power supply pin. this pin should be externally equipped with bypass capacity to minimize ground impedance. m m m m pc2792tb 6 input ? 1.11 0.92 signal input pin. a internal matching circuit, configured with resistors, enables 50 w connection over a wide band. a multi-feedback circuit is designed to cancel the deviations of h fe and resistance. this pin must be coupled to front stage with capacitor for dc cut. note pin voltage is measured at v cc = 5.0 v. above: m pc2791tb, below: m pc2792tb out gnd gnd in v cc 2 5 4 3 1 6 out gnd gnd in v cc 2 5 4 3 1 6
data sheet p11863ej2v0ds00 4 m m m m pc2791tb , m m m m pc2792tb absolute maximum ratings parameter symbol conditions ratings unit supply voltage v cc t a = +25 c6v power dissipation p d mounted on doublesided copper clad 50 50 1.6 mm epoxy glass pwb (t a = +85 c) 200 mw operating ambient temperature t a - 40 to +85 c storage temperature t stg - 55 to +150 c input power p in t a = +25 c +10 dbm recommended operating conditions parameter symbol min. typ. max. unit supply voltage v cc 4.5 5.0 5.5 v operating ambient temperature t a - 40 +25 +85 c electrical characteristics (t a = +25 c, v cc = 5.0 v, z s = z l = 50 w w w w ) m pc2791tb m pc2792tb parameter symbol test conditions min. typ. max. min. typ. max. unit circuit current i cc no signal 12 17 22 14 19 24 ma power gain g p f = 500 mhz 10 12 14 17 20 22 db noise figure nf f = 500 mhz ? 5.5 7.0 ? 3.5 6.0 db upper limit operating frequency f u 3 db down from flat gain 1.6 1.9 ? 1.0 1.2 ? ghz isolation isl f = 500 mhz 20 24 ? 24 28 ? db input return loss rl in f = 500 mhz 9 12 ? 12 15 ? db output return loss rl out f = 500 mhz 8 11 ? 912 ? db saturated output power p o(sat) f = 500 mhz, p in = 0 dbm +2.0 +4.0 ? +3.0 +5.0 ? dbm
data sheet p11863ej2v0ds00 5 m m m m pc2791tb , m m m m pc2792tb test circuit 1 000 pf 1 000 pf 1 000 pf in out 50 w 50 w c 3 c1 c2 v cc 4 3 6 1, 2, 5 example of application circuit 1 000 pf c 6 1 000 pf 1 000 pf 1 000 pf 1 000 pf in out 50 w 50 w c 3 c 1 c 4 c 5 r 1 50 to 200 w 1 000 pf c 2 v cc to stabilize operation, please connect r 1 , c 5 4 3 6 1, 2, 5 4 3 6 1, 2, 5 the application circuits and their parameters are for reference only and are not intended for use in actual design-ins. capacitors for the v cc , input and output pins 1 000 pf capacitors are recommendable as bypass capacitor for v cc pin and coupling capacitors for input/output pins. bypass capacitor for v cc pin is intended to minimize v cc pins ground impedance. therefore, stable bias can be supplied against v cc fluctuation. coupling capacitors for input/output pins are intended to minimize rf serial impedance and cut dc. to get flat gain from 100 mhz up, 1 000 pf capacitors are assembled on the test circuit. [actually, 1 000 pf capacitors give flat gain at least 10 mhz. in the case of under 10 mhz operation, increase the value of coupling capacitor such as 2 200 pf. because the coupling capacitors are determined by the equation of c = 1/(2 p fzs).]
data sheet p11863ej2v0ds00 6 m m m m pc2791tb , m m m m pc2792tb illustration of the test circuit assembled on evaluation board top view mounting direction (marking is an example for pc2791tb) m 1 2 3 6 5 4 in out v cc amp-3 c c c c2s component list notes value c 1 000 pf for more information on the use of this ic, refer to the following application note: usage and applications of 6-pin mini-mold, 6-pin super mini-mold silicon high-frequency wideband amplifier mmic (p11976e). 1. 30 30 0.4 mm double sided copper clad polyimide board. 2. back side : gnd pattern 3. solder plated on pattern 4. : through holes
data sheet p11863ej2v0ds00 7 m m m m pc2791tb , m m m m pc2792tb typical characteristics (unless otherwise specified, t a = +25 c) - - - - m m m m pc2791tb - - - - no signal v cc = 5.0 v v cc = 5.0 v circuit current vs. supply voltage circuit current vs. operating ambient temperature noise figure, insertion power gain vs. frequency insertion power gain vs. frequency circuit current i cc (ma) circuit current i cc (ma) insertion power gain g p (db) insertion power gain g p (db) noise figure nf (db) supply voltage v cc (v) operating ambient temperature t a ( c) frequency f (ghz) isolation vs. frequency 0.1 0.3 1.0 3.0 isolation isl (db) frequency f (ghz) frequency f (ghz) 30 25 20 15 10 5 0 9 8 7 6 5 4 30 25 20 15 10 5 0 0123456 - 60 - 40 - 20 0 + 20 + 40 + 60 + 80 + 100 15 10 5 0 0 - 10 - 20 - 30 - 40 - 50 15 10 5 0 0.1 0.3 1.0 3.0 0.3 1.0 3.0 0.1 v cc = 5.0 v v cc = 5.0 v v cc = 4.5 v v cc = 4.5 v v cc = 5.5 v v cc = 5.5 v no signal nf g p t a = - 40 c t a = + 25 c t a = + 85 c v cc = 5.0 v input return loss, output return loss vs. frequency 0.1 0.3 1.0 3.0 input return loss rl in (db) output return loss rl out (db) frequency f (ghz) 0 - 10 - 20 - 30 - 40 - 50 v cc = 5.0 v rl in rl out
data sheet p11863ej2v0ds00 8 m m m m pc2791tb , m m m m pc2792tb - - - - m m m m pc2791tb - - - - f 1 = 500 mhz f 2 = 504 mhz output power vs. input power output power vs. input power saturated output power vs. frequency third order intermodulation distortion vs. output power of each tone output power p out (dbm) output power p out (dbm) saturated output power p o (sat) (dbm) third order intermodulation distortion im 3 (dbc) input power p in (dbm) input power p in (dbm) frequency f (ghz) output power of each tone p o (each) (dbm) + 10 + 5 0 - 5 - 10 - 15 - 20 - 25 + 10 + 5 0 - 5 - 10 - 15 - 20 - 25 - 35 - 30 - 25 - 20 - 15 - 10 - 50 - 35 - 30 - 25 - 20 - 15 - 10 - 50 + 8 + 6 + 4 + 2 0 - 2 - 4 - 6 - 60 - 50 - 40 - 30 - 20 - 10 0 0.1 0.3 1.0 3.0 + 2 - 14 - 10 - 6 - 2 - 12 - 8 - 40 v cc = 5.0 v v cc = 5.0 v f = 500 mhz v cc = 5.5 v v cc = 5.0 v v cc = 4.5 v f = 500 mhz v cc = 5.0 v t a = + 85 c t a = + 25 c t a = - 40 c v cc = 5.5 v v cc = 5.5 v v cc = 4.5 v v cc = 4.5 v f = 500 mhz
data sheet p11863ej2v0ds00 9 m m m m pc2791tb , m m m m pc2792tb s-parameter (t a = +25 c, v cc = 5.0 v) - - - - m m m m pc2791tb - - - - s 11 -frequency 1.0 g 0.1 g 3.0 g 2.0 g s 22 -frequency 1.0 g 0.1 g 2.0 g
data sheet p11863ej2v0ds00 10 m m m m pc2791tb , m m m m pc2792tb typical s-parameter values (t a = +25 c) - - - - m m m m pc2791tb - - - - v cc = 5.0 v, i cc = 17.0 ma frequency s 11 s 21 s 12 s 22 k mhz mag.ang.mag.ang.mag.ang.mag.ang. 100.0000 0.155 11.8 4.157 C8.1 0.085 C4.4 0.211 174.9 1.53 200.0000 0.191 21.7 4.179 C16.4 0.081 C7.2 0.203 168.6 1.56 300.0000 0.240 25.3 4.193 C24.6 0.079 C11.0 0.192 163.1 1.56 400.0000 0.290 25.6 4.245 C33.2 0.075 C11.1 0.179 156.8 1.59 500.0000 0.337 22.9 4.288 C42.4 0.068 C13.2 0.161 152.3 1.65 600.0000 0.383 18.1 4.320 C51.7 0.064 C13.3 0.140 149.8 1.69 700.0000 0.418 11.0 4.316 C61.9 0.059 C13.2 0.115 149.8 1.74 800.0000 0.459 3.2 4.316 C72.0 0.054 C11.4 0.087 156.4 1.81 900.0000 0.499 C4.9 4.268 C82.3 0.049 C8.3 0.067 175.9 1.90 1000.0000 0.553 C12.7 4.243 C91.9 0.045 C1.1 0.069 C155.3 1.88 1100.0000 0.604 C19.5 4.218 C102.2 0.045 4.7 0.097 C138.9 1.72 1200.0000 0.647 C26.4 4.140 C113.2 0.041 13.4 0.133 C137.3 1.71 1300.0000 0.670 C33.9 3.981 C124.8 0.045 20.2 0.175 C140.2 1.53 1400.0000 0.672 C42.4 3.753 C136.1 0.049 27.7 0.214 C145.4 1.50 1500.0000 0.665 C50.1 3.473 C146.3 0.054 28.4 0.251 C152.7 1.47 1600.0000 0.659 C57.4 3.169 C155.5 0.058 33.3 0.279 C159.6 1.53 1700.0000 0.653 C65.1 2.924 C164.3 0.063 32.8 0.302 C166.3 1.55 1800.0000 0.645 C71.8 2.680 C172.6 0.067 33.0 0.320 C172.9 1.60 1900.0000 0.642 C77.8 2.490 C179.7 0.071 31.2 0.328 C178.8 1.63 2000.0000 0.621 C83.3 2.302 173.0 0.071 31.0 0.336 175.6 1.84 2100.0000 0.605 C89.3 2.137 166.6 0.072 30.6 0.340 170.4 1.98 2200.0000 0.577 C94.9 1.977 160.2 0.074 30.3 0.344 165.3 2.19 2300.0000 0.561 C101.0 1.838 154.2 0.076 31.4 0.343 161.7 2.35 2400.0000 0.536 C106.7 1.714 148.2 0.075 30.8 0.345 158.1 2.62 2500.0000 0.521 C111.7 1.596 142.9 0.078 31.2 0.343 154.9 2.77 2600.0000 0.509 C116.1 1.499 137.1 0.078 31.4 0.342 151.7 2.98 2700.0000 0.493 C120.9 1.416 132.2 0.080 32.1 0.340 149.4 3.12 2800.0000 0.482 C125.0 1.353 126.6 0.080 34.2 0.336 146.9 3.33 2900.0000 0.467 C128.6 1.283 122.6 0.082 33.8 0.341 144.6 3.45 3000.0000 0.453 C132.3 1.222 116.8 0.085 34.0 0.341 142.5 3.55 3100.0000 0.441 C137.2 1.172 113.1 0.087 34.2 0.341 140.4 3.68
data sheet p11863ej2v0ds00 11 m m m m pc2791tb , m m m m pc2792tb typical characteristics (unless otherwise specified, t a = +25 c) - - - - m m m m pc2792tb - - - - v cc = 5.0 v circuit current vs. supply voltage circuit current vs. operating ambient temperature noise figure, insertion power gain vs. frequency insertion power gain vs. frequency circuit current i cc (ma) circuit current i cc (ma) insertion power gain g p (db) insertion power gain g p (db) noise figure nf (db) supply voltage v cc (v) operating ambient temperature t a ( c) frequency f (ghz) isolation vs. frequency 0.1 0.3 1.0 3.0 isolation isl (db) frequency f (ghz) frequency f (ghz) 35 30 25 20 15 10 5 0 7 6 5 4 3 35 30 25 20 15 10 5 0 0123456 - 60 - 40 - 20 0 + 20 + 40 + 60 + 80 + 100 25 20 15 10 5 0 0 - 10 - 20 - 30 - 40 - 50 25 20 15 10 5 0 0.1 0.3 1.0 3.0 0.3 1.0 3.0 0.1 v cc = 5.0 v v cc = 5.0 v v cc = 4.5 v v cc = 4.5 v v cc = 5.5 v v cc = 5.5 v no signal nf t a = + 25 c v cc = 5.0 v input return loss, output return loss vs. frequency 0.1 0.3 1.0 3.0 input return loss rl in (db) output return loss rl out (db) frequency f (ghz) 0 - 10 - 20 - 30 - 40 - 50 v cc = 5.0 v rl in rl out no signal v cc = 5.0 v g p t a = - 40 c t a = + 85 c
data sheet p11863ej2v0ds00 12 m m m m pc2791tb , m m m m pc2792tb - - - - m m m m pc2792tb - - - - f 1 = 500 mhz f 2 = 504 mhz output power vs. input power output power vs. input power saturated output power vs. frequency third order intermodulation distortion vs. output power of each tone output power p out (dbm) output power p out (dbm) saturated output power p o (sat) (dbm) third order intermodulation distortion im 3 (dbc) input power p in (dbm) input power p in (dbm) frequency f (ghz) output power of each tone p o (each) (dbm) + 10 + 5 0 - 5 - 10 - 15 - 20 - 25 + 10 + 5 0 - 5 - 10 - 15 - 20 - 25 - 40 - 35 - 30 - 25 - 20 - 15 - 10 - 5 - 40 - 35 - 30 - 25 - 20 - 15 - 10 - 5 + 10 + 8 + 6 + 4 + 2 0 - 2 - 4 - 60 - 50 - 40 - 30 - 20 - 10 0 0.1 0.3 1.0 3.0 + 4 - 12 - 8 - 40 - 10 - 16 - 14 - 6 - 2 + 2 v cc = 5.0 v v cc = 5.0 v f = 500 mhz v cc = 5.5 v v cc = 5.0 v v cc = 4.5 v f = 500 mhz v cc = 5.0 v t a = + 85 c t a = + 25 c t a = - 40 c v cc = 5.5 v v cc = 5.5 v v cc = 4.5 v v cc = 4.5 v f = 500 mhz
data sheet p11863ej2v0ds00 13 m m m m pc2791tb , m m m m pc2792tb s-parameter (t a = +25 c, v cc = 5.0 v) - - - - m m m m pc2792tb - - - - s 11 -frequency 1.0 g 0.1 g 2.0 g s 22 -frequency 1.0 g 0.1 g 2.0 g
data sheet p11863ej2v0ds00 14 m m m m pc2791tb , m m m m pc2792tb typical s-parameter values (t a = +25 c) - - - - m m m m pc2792tb - - - - v cc = 5.0 v, i cc = 19.0 ma frequency s 11 s 21 s 12 s 22 k mhz mag.ang.mag.ang.mag.ang.mag.ang. 100.0000 0.029 C8.4 11.334 C11.1 0.038 0.4 0.205 169.7 1.34 200.0000 0.040 12.5 11.414 C22.4 0.038 1.8 0.194 157.6 1.34 300.0000 0.056 16.9 11.459 C34.1 0.036 2.7 0.180 145.4 1.37 400.0000 0.076 17.9 11.525 C46.2 0.036 3.7 0.160 130.1 1.39 500.0000 0.090 10.7 11.506 C58.9 0.035 5.3 0.137 113.0 1.42 600.0000 0.103 0.3 11.394 C72.0 0.034 8.9 0.110 91.0 1.47 700.0000 0.122 C14.9 11.159 C85.6 0.034 11.6 0.090 56.4 1.48 800.0000 0.148 C28.8 10.840 C99.5 0.034 13.9 0.094 8.9 1.50 900.0000 0.181 C40.4 10.239 C113.7 0.032 19.9 0.127 C26.9 1.58 1000.0000 0.219 C48.0 9.577 C127.1 0.031 22.9 0.174 C51.7 1.68 1100.0000 0.248 C54.0 8.783 C140.5 0.031 27.1 0.222 C71.0 1.71 1200.0000 0.271 C60.3 7.883 C153.0 0.032 32.3 0.264 C86.7 1.76 1300.0000 0.277 C67.2 6.929 C164.4 0.034 39.4 0.299 C101.0 1.87 1400.0000 0.286 C77.3 6.074 C174.3 0.035 44.0 0.322 C112.8 1.99 1500.0000 0.298 C86.0 5.338 177.3 0.038 49.1 0.341 C123.3 2.04 1600.0000 0.311 C93.2 4.709 169.7 0.040 54.9 0.350 C131.9 2.20 1700.0000 0.328 C99.6 4.206 162.6 0.046 56.5 0.358 C139.2 2.11 1800.0000 0.338 C105.2 3.793 156.0 0.048 58.3 0.360 C145.8 2.24 1900.0000 0.347 C110.0 3.474 150.4 0.053 60.5 0.356 C151.1 2.22 2000.0000 0.345 C115.4 3.179 144.6 0.055 60.4 0.355 C156.0 2.33 2100.0000 0.349 C121.1 2.926 138.7 0.059 60.3 0.350 C160.4 2.37 2200.0000 0.353 C126.8 2.704 133.6 0.063 60.5 0.346 C164.6 2.42 2300.0000 0.365 C131.5 2.513 128.2 0.069 61.7 0.339 C166.9 2.37 2400.0000 0.371 C136.3 2.345 122.8 0.072 60.7 0.335 C169.0 2.42 2500.0000 0.377 C139.3 2.192 118.0 0.077 60.6 0.329 C170.9 2.42 2600.0000 0.378 C142.3 2.059 112.6 0.082 61.3 0.324 C172.3 2.44 2700.0000 0.380 C146.4 1.931 108.2 0.083 59.9 0.316 C173.1 2.56 2800.0000 0.382 C150.0 1.827 102.7 0.091 59.9 0.314 C174.0 2.48 2900.0000 0.381 C153.4 1.727 99.0 0.094 59.4 0.317 C174.5 2.52 3000.0000 0.380 C157.0 1.633 93.7 0.098 57.4 0.318 C175.1 2.56 3100.0000 0.390 C160.4 1.557 90.1 0.102 58.2 0.318 C175.2 2.54
data sheet p11863ej2v0ds00 15 m m m m pc2791tb , m m m m pc2792tb package dimensions 6 pin super minimold (unit: mm) 1.25 0.1 2.1 0.1 0.65 0.65 1.3 2.0 0.2 0.1 min. 0.7 0.9 0.1 0 to 0.1 0.2 0.15 +0.1 ?.05 +0.1 ?.05
data sheet p11863ej2v0ds00 16 m m m m pc2791tb , m m m m pc2792tb notes on correct use (1) observe precautions for handiling because of electro-static sensitive devices. (2) form a ground pattern as wide as possible to minimize ground impedance (to prevent undesired oscillation). all the ground pins must be connected together with wide ground pattern to decrease impedance difference. (3) the bypass capacitor should be attached to v cc line. (4) the dc cut capacitor must be each attached to input and output pin. recommended soldering conditions this product should be soldered under the following recommended conditions. for soldering methods and conditions other than those recommended below, contact your nec sales representative. soldering method soldering conditions recommended condition symbol infrared reflow package peak temperature: 235c or below time: 30 seconds or less (at 210c) count: 3, exposure limit: none note ir35-00-3 vps package peak temperature: 215c or below time: 40 seconds or less (at 200c) count: 3, exposure limit: none note vp15-00-3 partial heating pin temperature: 300c time: 3 seconds or less (per side of device) exposure limit: none note C note after opening the dry pack, keep it in a place below 25c and 65% rh for the allowable storage period. caution do not use different soldering methods together (except for partial heating). for details of recommended soldering conditions for surface mounting, refer to information document semiconductor device mounting technology manual (c10535e) .
data sheet p11863ej2v0ds00 17 m m m m pc2791tb , m m m m pc2792tb [memo]
data sheet p11863ej2v0ds00 18 m m m m pc2791tb , m m m m pc2792tb [memo]
data sheet p11863ej2v0ds00 19 m m m m pc2791tb , m m m m pc2792tb [memo]
m m m m pc2791tb , m m m m pc2792tb attention observe precautions for handling electrostatic sensitive devices nesat (nec silicon advanced technology) is a trademark of nec corporation. the information in this document is subject to change without notice. before using this document, please confirm that this is the latest version. no part of this document may be copied or reproduced in any form or by any means without the prior written consent of nec corporation. nec corporation assumes no responsibility for any errors which may appear in this document. nec corporation does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from use of a device described herein or any other liability arising from use of such device. no license, either express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of nec corporation or others. descriptions of circuits, software, and other related information in this document are provided for illustrative purposes in semiconductor product operation and application examples. the incorporation of these circuits, software, and information in the design of the customer's equipment shall be done under the full responsibility of the customer. nec corporation assumes no responsibility for any losses incurred by the customer or third parties arising from the use of these circuits, software, and information. while nec corporation has been making continuous effort to enhance the reliability of its semiconductor devices, the possibility of defects cannot be eliminated entirely. to minimize risks of damage or injury to persons or property arising from a defect in an nec semiconductor device, customers must incorporate sufficient safety measures in its design, such as redundancy, fire-containment, and anti-failure features. nec devices are classified into the following three quality grades: "standard", "special", and "specific". the specific quality grade applies only to devices developed based on a customer designated "quality assurance program" for a specific application. the recommended applications of a device depend on its quality grade, as indicated below. customers must check the quality grade of each device before using it in a particular application. standard: computers, office equipment, communications equipment, test and measurement equipment, audio and visual equipment, home electronic appliances, machine tools, personal electronic equipment and industrial robots special: transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster systems, anti-crime systems, safety equipment and medical equipment (not specifically designed for life support) specific: aircraft, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support systems or medical equipment for life support, etc. the quality grade of nec devices is "standard" unless otherwise specified in nec's data sheets or data books. if customers intend to use nec devices for applications other than those specified for standard quality grade, they should contact an nec sales representative in advance. m7 98. 8

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