unisonic technologies co., ltd 88nxx preliminary cmos ic www.unisonic.com.tw 1 of 5 copyright ? 2010 unisonic technologies co., ltd qw-r502-368.b built-in delay circuit high-precision voltage detector ? description the utc 88nxx is a high-precision voltage detector developed basing on cmos technology. the detection voltage is fixed internally. a time delayed reset can be accomplished with an external capacitor. n-ch open-drain output form is available . the utc 88nxx is generally used for power supply monitor of portable equipment such as notebook pcs, digital still cameras, pdas, and mobile phones, constant voltage power monitor of cameras, video equipment and communication equipment, and power monitor or reset of cpus and microcomputers. ? features * extremely low current dissipation : 1.2 a typ. (detection voltage 1.5 v @ v dd =3.5 v) * 2.0 % accuracy detection voltage * hysteresis characteristics: 5% typ * detection voltage varies from 1.5v to 6.0v with 0.1v step * output forms: n-ch open-drain output (when it is in active-low) ? ordering information ordering number package packing 88NXXG-AF5-R sot-25 tape reel note: xx: output voltage, re fer to marking information.
88nxx preliminary cmos ic unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r502-368.b ? marking information package voltage code marking sot-25 21:2.1v 29:2.9v ? pin configuration ? pin description pin no pin name description 1 v out voltage detection output pin 2 v dd voltage input pin 3 v ss gnd pin 4 nc no connection (note) 5 cd connection pin for delay capacitor note: the nc pin is electrically open and can be connected to v dd or v ss .
88nxx preliminary cmos ic unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r502-368.b ? block diagram v dd v ss v ref delay circuit cd v out + -
88nxx preliminary cmos ic unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r502-368.b ? absolute maximum rating (ta=25c, unless otherwise specified) parameter symbol ratings unit power supply voltage v dd - v ss 12 v cd pin input voltage v cd v ss -0.3 ~ v dd +0.3 v output voltage v out v ss -0.3 ~ v ss +12 v output current i out 50 ma power dissipation p d 250 mw operating temperature t opr -40 ~ +85 c storage temperature t stg -40 ~ +125 c note: absolute maximum ratings are those values be yond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? electrical characteristics (ta=25c unless otherwise specified) detection voltage: 2.1v parameter symbol test circuit test conditions min typ max unit detection voltage (note 1) -v det 1 -v det(s) 0.98 -v det(s) -v det(s) 1.02 v hysteresis width v hys 1 -v det 0.03 -v det 0.05 -v det 0.08 v current consumption i ss 2 v dd =3.5 v 1.2 5 a operating voltage v dd 1 0.95 10.0 v output current i out 3 output transistor nch, v ds =0.5v, v dd =1.2v 0.59 1.36 ma leakage current i leak 3 output transistor nch, v ds =10v, v dd =10v 0.1 a detection voltage temperature coefficient (note 2) det det v - ta v - 1 ta=-40c ~ +85c 100 350 ppm/c delay time t d 4 v dd =3.5v, c d =4.7 nf 20 30 34 ms detection voltage: 2.9v parameter symbol test circuit test conditions min typ max unit detection voltage (note 1) -v det 1 -v det(s) 0.98 -v det(s) -v det(s) 1.02 v hysteresis width v hys 1 -v det 0.03 -v det 0.05 -v det 0.08 v current consumption i ss 2 v dd =4.5 v 1.3 5 a operating voltage v dd 1 0.95 10.0 v output current i out 3 output transistor nch, v ds =0.5v, v dd =2.4v 2.88 4.98 ma leakage current i leak 3 output transistor nch, v ds =10v, v dd =10v 0.1 a detection voltage temperature coefficient (note 2) det det v - ta v - 1 ta=-40c ~ +85c 100 350 ppm/c delay time t d 4 v dd =4.5v, c d =4.7 nf 20 27 34 ms note: 1. -v det : actual detection voltage -v det(s) : specified detection voltage 2. the temperature change ratio in t he detection voltage [mv/c] is calcul ated by using the following equation: 1000 ] c / ppm [ -v ta v - ] v .)[ typ ( -v = c] [mv/ ta v - ) 3 ( det det ) 2 ( det (1) det (1) temperature change ra tio of the detection voltage (2) specified detection voltage (3) detection voltage temperature coefficient
88nxx preliminary cmos ic unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r502-368.b ? test circuits 88nxx series v dd v out cd v ss v dd v v 100k figure 1 figure 2 88nxx series v dd v out cd v ss v dd v ds v a v 88nxx series v dd v out v ss oscilloscope p.p. 100k ? cd figure 3 figure 4 utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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