? semiconductor components industries, llc, 2008 september, 2008 ? rev. 1 1 publication order number: ncp304a/d ncp304a voltage detector series the ncp304a is a second generation ultra ? low current voltage detector. this device is specifically designed for use as a reset controller in portable microprocessor based systems where extended battery life is paramount. this device features a highly accurate undervoltage detector with hysteresis which prevents erratic system reset operation as the comparator threshold is crossed. the ncp304a consists of complementary output devices that are available with either an active high or active low reset output. the ncp304a is available in the sc ? 82ab package with standard undervoltage thresholds. additional thresholds that range from 0.9 v to 4.9 v in 100 mv steps can be manufactured. features ? quiescent current of 1.0 a typical ? high accuracy undervoltage threshold of 2.0% ? wide operating voltage range of 0.8 v to 10 v ? complementary output ? active low or active high reset output ? this is a pb ? free device typical applications ? microprocessor reset controller ? low battery detection ? power fail indicator ? battery backup detection ncp304alsqxxt1 complementary output configuration v ref input reset output gnd 2 3 4 * *the representative block diagram depicts active low reset output ?l? suffix devices. the comparator input is interchanged for the active high output ?h? suffix devices. this device contains 38 active transistors. figure 1. representative block diagrams see detailed ordering and shipping information in the ordering information section on page 5 of this data sheet. ordering information sc ? 82ab sq suffix case 419c pin connections and marking diagram 4 1 nc reset output (top view) sud = specific device code m = date code = pb ? free package http://onsemi.com 1 2 43 v in gnd sud m (note: microdot may be in either location)
ncp304a http://onsemi.com 2 maximum ratings (note 1) rating symbol value unit input power supply voltage (pin 4) v in 12 v output voltage (pin 3) complementary, ncp304a v out ? 0.3 to v in +0.3 v output current (pin 3) (note 2) i out 70 ma thermal resistance, junction ? to ? air r ja 285 c/w maximum junction temperature t j +125 c storage temperature range t stg ? 55 to +150 c latchup performance (note 3) positive negative i latchup 500 170 ma stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. 1. this device series contains esd protection and exceeds the following tests: human body model 2000 v per mil ? std ? 883, method 3015. machine model method 200 v. 2. the maximum package power dissipation limit must not be exceeded. p d t j(max) ? t a r ja 3. maximum ratings per jedec standard jesd78. electrical characteristics (for all values t a = 25 c, unless otherwise noted.) characteristic symbol min typ max unit ncp304a ? 4.3 detector threshold (pin 4, v in decreasing) v det ? 4.214 4.3 4.386 v detector threshold hysteresis (pin 4, v in increasing) v hys 0.129 0.225 0.301 v supply current (pin 4) (v in = 4.14 v) (v in = 6.3 v) i in ? ? ? ? 3.0 3.9 a maximum operating voltage (pin 4) v in(max) ? ? 10 v minimum operating voltage (pin 4) (t a = ? 40 c to 85 c) v in(min) ? ? 0.55 0.65 0.70 0.80 v reset output current (pin 3, active low ?l? suffix devices) i out ma n ? channel sink current, ncp304a (v out = 0.05 v, v in = 0.70 v) (v out = 0.50 v, v in = 1.5 v) 0.01 1.0 0.05 2.0 ? ? p ? channel source current, ncp304a (v out = 5.9 v, v in = 8.0 v) 1.5 3.0 ? reset output current (pin 3, active high ?h? suffix devices) i out ma n ? channel sink current, ncp304a (v out = 0.5 v, v in = 5.0 v) 6.3 11 ? p ? channel source current, ncp304a (v out = 0.4 v, v in = 0.7 v) (v out = gnd, v in = 1.5 v) 0.011 0.525 0.04 0.6 ? ? propagation delay input to output (figure 2) s ncp304a series output transition, high to low (note 4) output transition, low to high (note 4) t phl t plh ? ? 10 21 ? 60 4. the time interval between the rising edge of v dd input pulse from 0.7 v to (+v det ) +2.0 v and output voltage level becoming to v dd /2.
ncp304a http://onsemi.com 3 figure 2. propagation delay measurement conditions ncp304a is measured with a 10 pf capacitive load. the reset output voltage waveforms are shown for the active low ?l ? devices. the upper detector threshold, v det+ is the sum of the lower detector threshold, v det ? plus the input hysteresis, v hys . input voltage, pin 2 reset output voltage, pin 1 0.7 0 v 5 v 0 v 0.5 v 2.5 v ncp304al complementary ncp305l open drain t plh t phl 0.1 v reset output voltage, pin 1 0 v v det+ + 2 v det+ + 2 v det+ + 2 2 table 1. ncp304a series electrical characteristic table for 0.9 ? 4.9 v part number detector threshold detector threshold hysteresis supply current n ? channel sink cur- rent p ? channel source current v in low v in high v in low v in high v det ? (v) v hys (v) i in ( a) (note 5) i in ( a) (note 6) i out (ma) (note 7) i out (ma) (note 8) i out (ma) (note 9) min typ max min typ max typ typ typ typ typ ncp304alsq43t1 4.214 4.3 4.386 0.129 0.215 0.301 1.1 1.3 3.0 5. v in = v det ? ? 0.16 v 6. condition 2: v in = v det ? + 2.0 v 7. condition 3: v in = 0.7 v, v out = 0.05 v, active low ?l? suffix devices 8. condition 4: v in = 1.5 v, v out = 0.5 v, active low ?l? suffix devices 9. condition 5: v in = 8.0 v, v out = 5.9 v, active low ?l? suffix devices
ncp304a http://onsemi.com 4 ? 50 4.9 t a , ambient temperature ( c) 4.8 4.7 4.6 4.4 ? 25 0 25 50 75 100 4.5 4.3 figure 3. ncp304a series 4.5 v detector threshold voltage vs. temperature 0 1.0 2.0 3.0 4.0 5.0 4.0 3.0 2.0 1.0 0 5.0 6.0 7.0 6.0 v in , input voltage (v) figure 4. ncp304al series 4.5 v reset output voltage vs. input voltage v out , output output (v) v det , detector threshold voltage (v) v det+ v det ? t a = ? 30 c t a = 25 c t a = 85 c v in , input voltage (v) 0 1.0 2.0 3.0 4.0 5.0 12 6.0 4.0 0 2.0 8.0 10 i out , output sink current (ma) t a = 85 c t a = 25 c t a = ? 30 c 2.0 0 2.0 6.0 8.0 1.5 1.0 0.5 0 v in , input voltage (v) 4.0 10 i in , input current ( a) figure 5. ncp304a series 4.5 v input current vs. input voltage figure 6. ncp304ah series 4.5 v reset output sink current vs. input voltage t a = 25 c operating description the ncp304a is a second generation ultra ? low current voltage detectors. figures 7 and 8 show a timing diagram and a typical application. initially consider that input voltage v in is at a nominal level and it is greater than the voltage detector upper threshold (v det+ ), and the reset output (pin 3) will be in the high state for active low devices, or in the low state for active high devices. if there is a power interruption and v in becomes significantly deficient, it will fall below the lower detector threshold (v det ? ). this sequence of events causes the reset output to be in the low state for active low devices, or in the high state for active high devices. after completion of the power interruption, v in will again return to its nominal level and become greater than the v det+ . the voltage detector has built ? in hysteresis to prevent erratic reset operation as the comparator threshold is crossed. although this device is specifically designed for use as a reset controller in portable microprocessor based systems, it offers a cost ? effective solution in numerous applications where precise voltage monitoring is required.
ncp304a http://onsemi.com 5 figure 7. timing waveforms v in v det + v det ? input voltage, pin 2 v in 0 v reset output (active low), pin 1 reset output (active high), pin 1 v in 0 v v det + v det ? v det + v det ? application circuit information figure 8. microprocessor reset circuit 4 input 3 reset output gn d gnd v dd reset v dd ncp304a series 2 microprocessor * required for ncp305 * ordering information device threshold voltage output type reset marking package shipping ? NCP304ALSQ43T1G 4.3 cmos active low sud sc ? 82ab (pb ? free) 3000 / tape & reel note: additi onal active low threshold devices, ranging from 0.9 v to 4.9 v in 100 mv increments and ncp304a active high output devices, ranging from 0.9 v to 4.9 v in 100 mv increments can be manufac tured. contact your on semiconductor representative for availabi lity. ?for information on tape and reel specifications, includin g part orientation and tap e sizes, please refer to our tape and reel packaging spe- cifications brochure, brd8011/d.
ncp304a http://onsemi.com 6 package dimensions sc ? 82ab sq suffix case 419c ? 02 issue e notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. 419c ? 01 obsolete. new standard is 419c ? 02. 4. dimensions a and b do not include mold flash, protrusions, or gate burrs. 12 3 a g s n j k 4 d 3 pl b f l c h 0.05 (0.002) dim min max min max inches millimeters a 1.8 2.2 0.071 0.087 b 1.15 1.35 0.045 0.053 c 0.8 1.1 0.031 0.043 d 0.2 0.4 0.008 0.016 f 0.3 0.5 0.012 0.020 g 1.1 1.5 0.043 0.059 h 0.0 0.1 0.000 0.004 j 0.10 0.26 0.004 0.010 k 0.1 ??? 0.004 ??? l 0.05 bsc 0.002 bsc n 0.2 ref 0.008 ref s 1.8 2.4 0.07 0.09 *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* 1.30 0.0512 mm inches scale 10:1 0.65 0.026 1.90 0.075 0.90 0.035 0.70 0.028 0.95 0.037 on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its of ficers, employees, subsidiaries, af filiates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5773 ? 3850 ncp304a/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative
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