revision 7/28/2009 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2007. ? www.seawardinc.com.cn 1 SE810 3-pin microprocessor reset monitor (preliminary) description the SE810 is a cost-effective system supervisor integrated circuit (ic) designed to monitor vcc in digital and mixed signal systems and provide a warning signal when the system power supply is out of working range, and a reset signal to the host processor when necessary. no external components are required. the reset output is driven active within 20 sec of vcc falling through the reset voltage threshold. reset is maintained active for a 150msec(typ) after vcc rises above the reset threshold. the SE810 has an active-high reset output. the SE810 is characterized for operation from -40oc to 125oc, junction temperature. the SE810 is optimized to reject fast transient glitches on the vcc line. low supply current of 7 a (v cc =3.3v) makes these devices suitable for battery powered applications. the output voltages range from 1.7v to 4.5v in 100mv increments. standard voltage versions are 2.30, 2.63, 2.93, 3.08, 4.0, 4.38, and 4.63v. features ? precision v cc monitor for 2.8v, 3.0v, 3.3v, and 5.0v supplies ? 150msec typical reset output delay. ? low 7 a supply current typical. ? v cc transient immunity ? small sot-23 package and to-92 package ? no external components ? esd rating is 7kv(hbm). ? wide operating temperature: -40c to 125c ? 100% lead (pb)-free pin configuration application ? computers ? embedded systems ? battery powered equipment ? critical p power supply monitoring application diagram gnd gnd vcc vcc v cc c=0. 1u f SE810 reset reset input processor
revision 7/28/2009 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2007. ? www.seawardinc.com.cn 2 SE810 3-pin microprocessor reset monitor (preliminary) absolute maximum ratings (1) parameter symbol value units input voltage v cc 5.5 v output voltage reset -0.3 to (v cc + 0.3) v input current 20 ma output current i out 20 ma power dissipation p d internally limited (3) output short circuit duration infinite thermal resistance, junction-to-ambient ja 230 c/w operating temperature range t a -40~+125 lead temperature (soldering, 10 sec.) 260 c junction temperature t j -40 to +125 c storage temperature t s -60 to +150 c operating rating (2) parameter symbol value units supply input voltage v cc +2.0v to +5.5 v junction temperature t j -40 to +125 c ordering/marking information (sot23) ordering information marking information SE810xs s810xa ? suffix reset v cc threshold(v) l 4.63 m 4.38 j 4.00 t 3.08 s 2.93 r 2.63 the ?x? denotes a suffix for v cc threshold. the last character is the batch number. a dot on top right corner is for lead-free process. ordering/marking information (to92) ordering information marking information SE810z SE810z xxxx-lf suffix reset v cc threshold(v) z 2.30 xxxx is the batch number. lead-free package is indicated by lf after xxxx.
revision 7/28/2009 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2007. ? www.seawardinc.com.cn 3 SE810 3-pin microprocessor reset monitor (preliminary) electrical characteristics vcc=5v for l/m/j ;3.3v for t/s ;3.0v for r ,t a = 25c, unless otherwise specified. symbol parameter condition min typ max unit v cc input voltage 2.0 5.5 v i cc supply current -- 7 10 a v th reset threshold SE810l-4.63v SE810m-4.38v SE810j-4.00v SE810t-3.08v SE810s-2.93v SE810r-2.63v SE810r-2.30v 4.51 4.27 3.90 3.00 2.85 2.56 2.18 4.63 4.38 4.00 3.08 2.93 2.63 2.25 4.75 4.49 4.10 3.16 3.00 2.70 2.33 v reset threshold temperature coefficient (4) -- 30 -- ppm/c v cc to reset delay v cc = v th to (v th ? 100mv) -- 20 -- sec reset active timeout period -- 150 msec v ol reset output voltage low i sink = 1.2ma -- -- 0.4 v v oh reset output voltage high i source = 800 a 0.8v cc -- -- v note 1: exceeding the absolute maximum rating may damage the device. note 2: the device is not guaranteed to f unction outside its operating rating. note 3: the maximum allowable power dissipation at any t a (ambient temperature) is calculated using: p d(max) = (t j(max) ? t a )/ ja . exceeding the maximum allowable power dissipati on will result in excessive die temperature, and the regulator will go into thermal shutdown. see ?thermal consideration? section for details note 4: reset threshold temperature coefficient is the worst case voltage change divided by the total temperature range. pin description: pin no. symbol description 1 gnd ground 2 reset reset output remains high wh ile vcc is below the reset voltage threshold and for 150msec(typ) after vcc rises above reset threshold 3 vcc supply voltage (typ.)
revision 7/28/2009 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2007. ? www.seawardinc.com.cn 4 SE810 3-pin microprocessor reset monitor (preliminary) typical performance characteristics t-delay vs temperature 0 50 100 150 200 250 300 350 400 -50 -25 0 25 50 75 100 125 150 temperature( ) reset active timeou t period (ms) vth vs temperature 2.90 2.92 2.94 2.96 2.98 3.00 3.02 -50 -25 0 25 50 75 100 125 150 temperature( ) rset threshold(v )
revision 7/28/2009 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2007. ? www.seawardinc.com.cn 5 SE810 3-pin microprocessor reset monitor (preliminary) outline drawing sot-23 b c a d e f j g h k l mi n max mi n max a 0.110 0.120 2.80 3.04 b 0.047 0.055 1.20 1.40 c 0.083 0.104 2.10 2.64 d 0.035 0.040 0.8 9 1.03 e 0.070 0.080 1.7 8 2.0 5 f 0.018 0.024 0.4 5 0.60 g 0.015 0.020 0.3 7 0.51 h 0.000 5 0.004 0.013 0.10 j 0.034 0.040 0.887 1.0 2 k 0.003 0.007 0.085 0.1 8 l - 0.027 - 0.6 9 dim n inches mm dimensions outline drawing to-92 a b d e g f h k j minmaxminmax a 0.175 0.205 4.445 5.207 b 0.170 0.210 4.318 5.334 e 0.500 0.610 12.70 15.50 f 0.016 0.021 0.407 0.533 g 0.045 0.055 1.143 1.397 h 0.095 0.105 2.413 2.667 j 0.080 0.105 2.032 2.667 k 0.125 0.165 3.175 4.191 dim n inches mm dimensions
revision 7/28/2009 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2007. ? www.seawardinc.com.cn 6 SE810 3-pin microprocessor reset monitor (preliminary) contact information seaward electronics incorporated ? china section b, 2nd floor, shangdi scientific office complex,#22 shangdi xinxi rd haidian district, beijing 100085, china tel: 86-10-8289-5700/01/05 fax: 86-10-8289-5706 email: sales@seawardinc.com.cn seaward electronics corporation ? taiwan 2f, #181, sec. 3, minquan east rd, ta i p e i , ta i w a n r . o . c tel: 886-2-2712-0307 fax: 886-2-2712-0191 email: sales@seawardinc.com.tw seaward electronics incorporated ? north america 1512 centre pointe dr. milpitas, ca95035, usa tel: 1-408-821-6600 last updated - 7/28/2009
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