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2000 data sheet document no. en0495ej1v1ds00 date published april 2000 p printed in japan the information in this document is subject to change without notice. please confirm with the delivery specification before statting to design the system. tft color lcd module NL3224AC35-01, 13 14 cm (5.5 inches), 320 240 pixels, full color ntsc/pal mode, wide temperature range description NL3224AC35-01 and nl3224ac35-13 are tft (thin film transistor) active matrix color liquid crystal displays (lcd) comprising amorphous silicon tft attached to each signal electrode, a driving circuit and a backlight. both the products have a built-in backlight. their 14 cm diagonal display area contain 320 240 pixels and can display full-color simultaneously. the difference between NL3224AC35-01 and nl3224ac35-13 is as follows: ? NL3224AC35-01: antiglare polarizer surface ? nl3224ac35-13: smoth polarizer surface features ? high luminance ? ntsc/pal mode ? reversible horizontal and vertical scanning ? 234/240 line display ? wide temparature range ? analog rgb interface ? incorporated edge type backlight applications ? car navigations ? tv monitors ? video games ? monitors for process controller
NL3224AC35-01, 13 2 data sheet en0495ej1v1ds00 structure and functions a tft color lcd module comprised a tft lcd panel, lsis for driving liquid crystal, and a backlight. the tft lcd panel is composed of a tft array glass substrate superimposed on a color filter glass substrate with liquid crystal filled in the narrow gap between two substrates. the backlight apparatus is located on the backside of the lcd panel. rgb (red, green, blue) data signals are sent to lcd panel drivers after modulation into suitable forms for active matrix addressing through signal processor. each of the liquid crystal cells acts as an electro-optical switch that controls the light transmission from the backlight by a signal applied to a signal electrode through the tft switch. outline of characteristics (at room temperature) items description display area 111.36 (h) 83.52 (v) mm drive system a-si tft active matrix display colors full-color number of pixels 320 240 pixel arrangement rgb vertical stripe pixel pitch 0.348 (h) 0.348 (v) mm module size 134.0 (h) 110.0 (v) 23.0 max. (d) mm weight 315 g (typ.) contrast ratio 85:1 (typ.) ? horizontal: 45 (typ. left side, right side) ? vertical: 30 (typ. up side), 15 (typ. down side) designed viewing direction ? wider viewing angle with contrast ratio : up side (12 oclock) ? wider viewing angle without image reversal : down side (6 oclock) ? optimum grayscale ( g = 2.2) : perpendicular color gamut 50 % (typ. center, to ntsc) response time 16 ms (typ.), white to black luminance 250 cd/m 2 (typ.) signal system analog rgb signals, synchronous signals (clk, hs, vs) backlight edge light type, one fluorescent lamp (cold cathode type) back-light unit. (parts no.: 55lhs-1) supply voltage 9.5 v (lcd power supply), 9.5 v (backlight power supply) power consumption 6.6 w (typ.) viewing angle (more than the contrast ratio of 10:1)
NL3224AC35-01, 13 3 data sheet en0495ej1v1ds00 block diagram of basic structure dc clamp gamma correction amp dc shift h-driver analog rgb v-driver + controller panel mute video select clamp pulse hs vs com signal 234/240 select reversible select ?horizontal ?vertical ntsc/pal select inverter backlight luminance control v dcb v dc ic s drivers gnda gndd video circuit board analog sw dc/dc converter note 1. frame is contacted with both gnda and gndd
NL3224AC35-01, 13 4 data sheet en0495ej1v1ds00 general specifications items description unit module size 134.0 0.5 (h) 110.0 0.5 (v) 23.0 max. (d) mm display area 111.36 (h) 83.52 (v) mm number of dots 320 3 (h) 240 (v) dot dot pitch 0.116 (h) 0.348 (v) mm pixel pitch 0.348 (h) 0.348 (v) mm pixel arrangement rgb (red, green, blue) vertical stripe C display colors full-color color weight 330 (max.) g note an inverter is incorporated with the module. absolute maximum ratings parameters symbols ratings unit remarks supply voltage v dc C0.5 to 20.0 v t a = 25?c v dcb C0.5 to 20.0 v analog rgb v in1 C2.5 to 2.5 v t a = 25?c input signal v dc = 9.5 v logic input voltage v in2 C0.5 to 5.5 v storage temp. t st C40 to 95 ?c C operating temp. t op C30 to 85 ?c note 1 relative humidity (rh) < = 95 % t a < = 40?c no < = 85 % 40 < t a < = 50?c condensation absolute humidity absolute humidity shall not g/m 3 t a > 50?c exceed t a = 50?c, rh = 85% note 1. module surface: measured at the display center.
NL3224AC35-01, 13 5 data sheet en0495ej1v1ds00 electrical characteristics (1) power supply, logic input t a = 25?c parameters symbol min. typ. max. unit remarks supply voltage v dc 8.0 9.5 13.0 v for processor, controller and driver v dcb 8.0 9.5 13.0 v for backlight logic input l voltage v il 0 C 0.9 v C logic input h voltage v ih 3.15 C 5.0 v logic output l voltage v ol 0 C 0.3 v logic output h voltage v oh 4.5 C 5.0 v supply current i dc C 147 200 ma at dot-checkered pattern (v dc = 9.5 v) i dcb C 541 600 ma maximum luminance (v dcb = 9.5 v) (2) analog rgb signals t a = 25?c parameters min. typ. max. unit remarks analog rgb input voltage (white - black) 0 C 0.7 vp-p zi = 75 w dc input level (black level) C1.0 C 1.0 v supply voltage sequence v dcb note1 logic signals note2 v dc note3 0 < < 30 ms 0 < < 200 ms note4 0 < < 30 ms time 0 < < 200 ms note4 notes 1. apply v dcb within the lcd operation period. when the backlight turns on before lcd operation or the lcd operation turns off before the backlight turns off, the display may momentarily become white. 2. when the v dc is off, please keep whole logic signals at 0 v. in case of the signal more than 0.3 v, internal circuit may get damaged. 3. please turn off v dc when the signals are put off. if the signals are put off without keep v dc , the display may be un-uniformity. 4. reference value. 5. while the power is off, please keep whole signals (hs, vs, extclk) at low level or high impedance. 6. wrong power sequence may damage to the module.
NL3224AC35-01, 13 6 data sheet en0495ej1v1ds00 interface pin configuration (1) connector (cn1) part no. : 52610-3090 supplier : molex adaptable cable : sumi-card 1.0 mm pitch 30 wick 85 c quality supplier : sumitomo electric industries, ltd. pin no. symbol pin no. symbol pin no. symbol 1 gndd 11 extcsl 21 gndd 2 extclk 12 gndd 22 gndd 3 gndd 13 n/p 23 gndd 4 hs 14 mtsl 24 gnda 5 vs 15 u/d 25 r 6h out 16 r/l 26 gnda 7v out 17 gndd 27 g 8b pls 18 v dcb 28 gnda 9 gndd 19 v dcb 29 b 10 gndd 20 v dc 30 gnda cn1 upper side < rear view > 1 30 lower side
NL3224AC35-01, 13 7 data sheet en0495ej1v1ds00 pin description symbols in/out logics description extclk in note 1 C external clock extclk becomes active, when extcsl is h extcsl in note 1 positive clock select signal h: external clock default value is l l: internal clock hs in note 1 negative horizontal synchronous signal vs in note 1 negative vertical synchronous signal h out out note 1 negative horizontal synchronous signal output v out out note 1 negative vertical synchronous signal output r in C analog red signal 0.7 vp-p zi = 75 w g in C analog green signal 0.7 vp-p zi = 75 w b in C analog blue signal 0.7 vp-p zi = 75 w r/l in note 1 C horizontal scanning select signal h: right scanning default value is l l: left scanning u/d in note 1 C vertical scanning select signal h: down scanning default value is l l: up scanning n/p in note 1 C display mode select h: pal mode default value is l l: ntsc mode mtsl in note 1 C vertical display area select signal h: 240 lines default value is l l: 234 lines b pls in note 1 C luminance control signal (pulse input) luminance is controlled by the pulse width. duty 100%: luminance max. refer to p17 (note 8). v dc in C power supply for processor, controller and driver (+9.5 v) v dcb in C power supply for backlight (+9.5 v) gnda C note 2 C ground for analog rgb signal gndd C note 2 C ground for logic (v dc ) and backlight (v dcb ) notes 1. cmos level 2. gnda should be separated from gndd to aboid display noise.
NL3224AC35-01, 13 8 data sheet en0495ej1v1ds00 signals no. functions description 1 reversible horizontal scanning r/l signal is able to reverse scanning direction. (right ? left or left ? right) 2 reversible vertical scanning u/d signal is able to reverse scanning direction. (up ? down or down ? up) 3 ntsc/pal mode n/p signal is able to change operating mode. (ntsc ? pal or pal ? ntsc) scanning line is thinned out at the rate of seven to six lines in the pal mode. 4 234/240 line display mtsl signal is able to change scanning line. (234 lines ? 240 lines or 240 lines ? 234 lines)
NL3224AC35-01, 13 9 data sheet en0495ej1v1ds00 input signal timing (1) mode (a) ntsc, internal clk parameters symbols min. typ. max. unit remarks internal-clk frequency 1/tc C 6.36 C mhz C C 157.32 C ns rise/fall tcrf C C 70 ns C duty tch/tc 0.4 0.5 0.6 C C hs frequency th 60.38 63.56 66.74 m s 15.734 khz C 404 C clk (typ.) display thd C 50.34 C m sC C 320 C clk pulse-width thp 1.0 4.7 C m sC C 30 C clk pulse-width thpb C 11.01 C m s 234 line +back-porch C 70 C clk C 12.11 C m s 240 line C 77 C clk clk-hsync timing thch 10.0 C C ns C hold/setup time thcs 10.0 C C ns C v-hsync timing thvh 1 C C clk C hold/setup time thvs 10.0 C C ns C rise/fall thrf C C 10.0 ns C vs frequency tv 15.85 16.68 17.51 ms 59.94 hz C 262.5 C h (typ.) display tvd C 14.87 C ms 234 line C 234 C h C 15.25 C ms 240 line C 240 C h pulse-width tvp 158.89 190.67 C m sC C3Ch pulse-width tvpb C 1.33 C ms C +back-porch C 21 C h rise/fall tvrf C C 10.0 ns C note in the display start period (pulse-width + back-porch), analog rgb signals should be blanking level.
NL3224AC35-01, 13 10 data sheet en0495ej1v1ds00 (b) pal, internal clk parameters symbols min. typ. max. unit remarks internal-clk frequency 1/tc C 6.45 C mhz C C 154.96 C ns rise/fall tcrf C C 70 ns C duty tch/tc 0.4 0.5 0.6 C C hs frequency th 60.80 64.00 67.20 m s 15.625 khz C 413 C clk (typ.) display thd C 49.60 C m sC C 320 C clk pulse-width thp 1.0 4.7 C m sC C 30 C clk pulse-width thpb C 11.93 C m s 234 line +back-porch C 77 C clk C 12.71 C m s 240 line C 82 C clk clk-hsync timing thch 10.0 C C ns C hold/setup time thcs 10.0 C C ns C v-hsync timing thvh 1 C C clk C hold/setup time thvs 10.0 C C ns C rise/fall thrf C C 10.0 ns C vs frequency tv 19.00 20.00 21.00 ms 50.00 hz C 312.5 C h (typ.) display tvd C 17.47 C ms 234 line C 273 C h C 17.92 C ms 240 line C 280 C h pulse-width tvp 153.60 192.00 C m sC C 2.5 C h pulse-width tvpb C 1.86 C ms 234 line +back-porch C 29 C h C 1.66 C ms 240 line C26C h rise/fall tvrf C C 10.0 ns C note in the display start period (pulse-width + back-porch), analog rgb signals should be blanking level.
NL3224AC35-01, 13 11 data sheet en0495ej1v1ds00 (c) ntsc, external clk parameters symbols min. typ. max. unit remarks extclk frequency 1/tc C 8.0 C mhz C 118.75 125.00 131.25 ns rise/fall tcrf C C 10 ns C duty tch/tc 0.4 0.5 0.6 C C hs frequency th 60.38 63.56 66.74 m s 15.734 khz C 508 C clk (typ.) display thd C 40.00 C m sC C 320 C clk pulse-width thp 1.0 4.7 C m sC C 38 C clk pulse-width thpb C 8.75 C m s 234 line +back-porch C 70 C clk C 9.63 C m s 240 line C 77 C clk clk-hsync timing thch 10.0 C C ns C hold/setup time thcs 10.0 C C ns C v-hsync timing thvh 1 C C clk C hold/setup time thvs 10.0 C C ns C rise/fall thrf C C 10.0 ns C vs frequency tv 15.85 16.68 17.51 ms 59.94 hz C 262.5 C h (typ.) display tvd C 14.87 C ms 234 line C 234 C h C 15.25 C ms 240 line C 240 C h pulse-width tvp 158.89 190.67 C m sC C3Ch pulse-width tvpb C 1.33 C ms C +back-porch C 21 C h rise/fall tvrf C C 10.0 ns C analog setup time tdas 10.0 C C ns C r, g, b hold time tdah 10.0 C C ns C note in the display start period (pulse-width + back-porch), analog rgb signals should be blanking level.
NL3224AC35-01, 13 12 data sheet en0495ej1v1ds00 (d) pal, external clk parameters symbols min. typ. max. unit remarks extclk frequency 1/tc C 8.0 C mhz C 118.75 125.00 131.25 ns rise/fall tcrf C C 10 ns C duty tch/tc 0.4 0.5 0.6 C C hs frequency th 60.80 64.00 67.20 m s 15.625 khz C 512 C clk (typ.) display thd C 40.00 C m sC C 320 C clk pulse-width thp 1.0 4.7 C m sC C 38 C clk pulse-width thpb C 9.63 C m s 234 line +back-porch C 77 C clk C 10.25 C m s 240 line C 82 C clk clk-hsync timing thch 10.0 C C ns C hold/setup time thcs 10.0 C C ns C v-hsync timing thvh 1 C C clk C hold/setup time thvs 10.0 C C ns C rise/fall thrf C C 10.0 ns C vs frequency tv 19.00 20.00 21.00 ms 50.00 hz C 312.5 C h (typ.) display tvd C 17.47 C ms 234 line C 273 C h C 17.92 C ms 240 line C 280 C h pulse-width tvp 153.60 192.00 C m sC C 2.5 C h pulse-width tvpb C 1.86 C ms 234 line +back-porch C 29 C h C 1.66 C ms 240 line C26C h rise/fall tvrf C C 10.0 ns C analog setup time tdas 10.0 C C ns C r, g, b hold time tdah 10.0 C C ns C note in the display start period (pulse-width + back-porch), analog rgb signals should be blanking level.
NL3224AC35-01, 13 13 data sheet en0495ej1v1ds00 (2) definition of input signal timing clk v ih * 1.5 v v il * r g b hs v ih * 1.5 v v il * vs v ih * 1.5 v v il * thrf tvrf v ih * 1.5 v v il * v ih * 1.5 v v il * hs tc tch tcrf tdas tdah thch thcs thvh thvs * v ih = 3.15 v (min.) to 5.00 v (max.) v il = 0.00 v (min.) to 0.90 v (max.)
NL3224AC35-01, 13 14 data sheet en0495ej1v1ds00 vs display period hs tv tvp tvb tvpb tvd display period th thp thb thpb thd
NL3224AC35-01, 13 15 data sheet en0495ej1v1ds00 optical characteristics (t a = 25 c, v dc = 12 v, v dc b = 12 v) note 1 item symbol condition min. typ. max. unit remark contrast ratio cr note 2 70 85 C C note 3 luminance lvmax note 2 200 250 C cd/m 2 note 4 luminance uniformity C max./min. C C 1.5 C note 5 reference data (t a = 25 c, v dc = 12 v, v dc b = 12 v) item symbol condition min. typ. max. unit remark contrast ratio cr q x = 0 , q y = C5 80 100 C C note 3 viewing angle range q x+ cr > 10, q y= C5 40 45 55 deg. note 6 q xC white/black 40 45 55 deg. q y + cr > 10, q x = 30 18 30 35 deg. q y C white/black 10 15 25 deg. color gamut c q x = 0 , q y = 0 to ntsc 40 50 C % C response time ton white to black C 16 30 ms note 7 toff black to white C 44 60 ms note 7 luminance control range C max. = 100% 10 C 100 % note 8 notes 1. t a = 25 c, v dc = 9.5 v, v dcb = 9.5 v 2. viewing angle is q x = 0 , q y = 0 . at center. 3. the contrast ratio is calculated by using the following formula. contrast ratio (cr) = luminance with all pixels in white luminance with all pixels in black the luminance is measured in a darkroom. 4. the luminance is measured after 20 minutes from the module works, with all pixels in white. the typical value is measured after luminance saturation. 50cm 1 photo-detector(topcon bm-5a) lcd module
NL3224AC35-01, 13 16 data sheet en0495ej1v1ds00 notes 5. the measurement-point of brightness (luminance) uniformity. 2 3 5 4 1 column 80 160 240 line 60 180 120 6. definitions of viewing angle are as follows. perpendicular q x - q y + q y - - x - y + y q x + + x 12 o?lock 7. definitions of response time is as follows. photo-detector output signal is measured when the luminance changes white to black and black to white. response time are ton and toff of the photo-detector output amplitude. ton is the time between 100% and 10%. toff is the time between 0% and 90%. 100% white black 0% luminance 10% ton toff 90%
NL3224AC35-01, 13 17 data sheet en0495ej1v1ds00 8. the pulse signal for luminous control needs to feed b pls -pin in the white-color data. (cmos level) (a) (b) 3.5 to 5.0 v (h level) 0 to 0.5 v (l level) recommendation: (a) = 500 s to 3.7 ms (b) = 3.7 ms 10% m pulse (a) duty 100%: relative luminance is 100% pulse (a) duty 20%: relative luminance is 10% (reference value) the luminance control function works more than 10 c luminance control returns default (factory set) for the stability of the lamp operation when the lcd is less than 10 c.
NL3224AC35-01, 13 18 data sheet en0495ej1v1ds00 reliability test specifications no. test item test condition judgement 1 high temperature (operation) <1> 85 2 c at the display area note 1 <2> 192 houres <3> others are based on jaso-d001-94. 2 low temperature (operation) <1> C30 c 4 c at the display area note 1 <2> 192 houres <3> others are based on jaso-d001-94. 3 high temperature (non-operation) <1> 95 c 2 c note 1 <2> 192 houres <3> others are based on jaso-d001-94. 4 low temperature (non-operation) <1> C40 c 4 c note 1 <2> 192 houres <3> others are based on jaso-d001-94. 5 high temperature/humidity <1> 60 c 2 c, 90% relative humidity note 1 (operation) <2> 192 houres <3> others are based on jaso-d001-94. 6 heat - humidity cycle <1> first step : 23 2 c, 65% relative humidity, note 1 (operation) 4 hours second step : 55 2 c, 97% relative humidity, 10 hours third step : C40 4 c, 2 hours no-humidity arrangement fourth step : 85 2 c, 2 hours no-humidity arrangement <2> 10 cycles, 24 hours/cycle (note 2) <3> others are based on jaso-d001-94. 7 heat cycle (operation) <1> first step : 75 2 c, 2 hours note 1 second step : C30 4 c, 2 hours <2> 35 cycles, 8 hours/cycle (note 3) <3> others are based on jaso-d001-94. 8 thermal shock (non-operation) <1> first step : 95 2 c, 2 hours note 1 second step : C40 4 c, 2 hours 1 cycle <2> 50 cycles <3> others are based on jaso-d001. 9 vibration (non-operation) <1> 5 to 200 hz, 29.4 m/s 2 (3g) note 1 <2> 10 min/sweep note 4 <3> x and y direction : 2 hours z direction : 4 hours <4> others are based on jaso-d001. jaso: japanese automobile standards organization
NL3224AC35-01, 13 19 data sheet en0495ej1v1ds00 no. test item test condition judgement 10 mechanical shock (non-operation) <1> 980 m/s 2 (100g), 11ms note 1 <2> x, y and z direction: 3 times each direction <3> others are based on jaso-d001. 11 esd (operation) <1> 150 pf, 150 w , 10 kv note 1 <2> 9 points on a panel note 4 <3> 10 times/point, at an interval of 1 second 12 dust (operation) <1> 15 kinds of dust (jis-z 8901) note 1 <2> 15 s/stir, 8 times jis: japanese industrial standards notes 1. display function is checked by the same condition of the out-going inspection. 2. refer to heat/humidity cycle pattern (see the next page). 3. refer to heat cycle pattern (see the next page). 4. discharge points are shown as follow.
NL3224AC35-01, 13 20 data sheet en0495ej1v1ds00 temp. 0 4 4.5 14.5 17 19 22.5 24 20.5 85?c 55?c ?0?c 23?c [h] relative humidity 0 4 4.5 14.5 17 19 22.5 24 20.5 65% 97% [h] operation (black display) operation (black display) non- operation one cycle non- operation one cycle no humidity arrangement note 2 heat/humidity cycle pattern note 3 heat cycle pattern 1h 2h 1h 1h 2h 2h ?0?c 75?c operation (black display) operation (black display)
NL3224AC35-01, 13 21 data sheet en0495ej1v1ds00 caution general cautions next figures and sentence are very important, please understand these contents as follows. this figure is a mark that you will get hurt and/or the module will have damages when you make a mistake to operate. this figure is a mark that you will get an electric shock when you make a mistake to operate. this figure is a mark that you will get hurt when you make a mistake to operate caution do not touch an inverter, on which is stuck a caution label while the lcd module is under the operation, because of dangerous high voltage. (1) caution when taking out the module a) pick the pouch only, when taking out the module from a slipping box. (2) cautions for handling the module a) as the electrostatic discharges may break the lcd module, handle the lcd module with care against electrostatic discharges. b) as the lcd panel and backlight element are made from fragile glass material, impulse and pressure to the lcd module should be avoided. c) as the surface of polarizer is very soft and easily scratched, use a soft dry cloth without chemicals for cleaning. d) do not pull the interface connectors in or out while the lcd module is operating. e) put the module display side down on a flat horizontal plane. f) handle connectors and cables with care. g) when the module is operating, do not lose extclk, hs, or vs signal. if any one of these signals is lost, the lcd panel would be damaged. (3) cautions for the atmosphere a) dew drop atmosphere should be avoided. b) do not store and/or operate the lcd module in a high temperature and/or high humidity atmosphere. storage in an electro-conductive polymer packing pouch and under relatively low temperature atmosphere is recommended. c) this module uses a cold cathod fluorescent lamp. therefore, the life time of the lamp becomes short conspicuously at low temperature. d) do not operate the lcd module in high magnetic field. (4) caution for the module characteristics a) do not apply the fixed patterns data signal to the lcd module at product aging. in order to avoid image sticking, do not display with fixed pattern. periodic change of display pattern is recommended.
NL3224AC35-01, 13 22 data sheet en0495ej1v1ds00 (5) other cautions a) do not disassemble and/or reassemble lcd module. b) do not readjust variable resistors nor switches, etc. c) when returning the module for repair etc., pack the module not to be broken. we recommend the original shipping packages. liquid crystal display has the following specific characteristics. there are not defects or malfunctions. the display condition of the lcd module may be affected by the ambient temperature. the module has cold cathode tube for backlighting. optical characteristics, like luminance or uniformity, will change during time. uneven brightness and/or small spots may be noticed depending on different display patterns.
NL3224AC35-01, 13 23 data sheet en0495ej1v1ds00 outline drawing (unit in mm) front view 23 max. nl3224ac35-** name plate (active area : 111.36) (2.25) (active area : 83.52) (89.5) 110.0 0.5 (118.0) 134.0 0.5 active area center module center
NL3224AC35-01, 13 24 data sheet en0495ej1v1ds00 outline drawing (unit in mm) rear view 86.0 ?.1 111.0 ?.1 (54.4) 86.0 ?.1 (13) 130 high voltage caution label disposal method label bar code label 4-m3.0 mounting holes depth 4 mm
NL3224AC35-01, 13 25 data sheet en0495ej1v1ds00
NL3224AC35-01, 13 26 data sheet en0495ej1v1ds00
NL3224AC35-01, 13 27 data sheet en0495ej1v1ds00
2 NL3224AC35-01, 13 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 of others. while nec corporation has been making continuous effort to enhance the reliability of its electronic components, 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 electronic components, 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 quanlity grades: "standard", "special", and "specific". the specific quanlity 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: aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support system 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 speci fied for standard quality grade, they should contact an nec sales representative in advance. anti-radioactive design is not implemented in this product.

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