SGM803 sgm809 sgm810 general description the SGM803/sgm809/sgm810 supervisory circuits monitor the power supply vo ltage in microprocessor and digital systems. they prov ide a reset output during power-up, power-down and brownout conditions. on power-up, an internal timer holds reset asserted for 240 ms. this holds the microprocessor in a reset state until conditions have stabilized. the reset output remains operational with v cc as low as 1 v. the SGM803/sgm809 provides an active low reset signal ( reset ) while the sgm810 provides an active high signal (reset) output. the sgm809/sgm810 have push-pull outputs, whereas the SGM803 has an open-drain output, which requires an external pull-up resistor. seven reset threshold voltage op tions are available suitable for monitoring 2.5v, 3v, 3.3v, and 5v supply voltages. the reset comparator features built-in glitch immunity, making it immune to fast transients on v cc . the low supply current of typically 17 a makes the SGM803/sgm809/sgm810 ideal for use in portable, battery operated equipment. they are available in the 3-pin sot23 package. applications microprocessor systems controllers intelligent instruments automotive systems safety systems portable instruments typical operation circuit microprocessor system SGM803/sgm809 gnd reset reset gnd v cc v cc r pull-up SGM803 only microprocessor supervisory circuit in 3-pin sot23 features ? precision voltage monitor: 2.5v,3 v, 3.3 v, 5 v options ? superior upgrade for max803/max809/max810 and SGM803/sgm809/sgm810 ? fully specified over temperature ? low power consumption (17 a typ) ? reset assertion down to 1 v v cc ? 160 ms min power-on reset open-drain reset output(SGM803) push-pull reset output (sgm809) push-pull reset output (sgm810) ? compact 3-pin sot23 package pin configurations top view SGM803 sgm809 sgm810 1 2 3 sot23-3 gnd v cc reset/reset sgm809- zxn3l (only) 1 2 3 sot23-3(l-type) gnd v cc reset rev. b shengbang microelectronics co, ltd tel: 86/451/84348461 www.sg-micro.com
SGM803/809/810 2 ordering information model reset threshold (v) specified temperature range ordering number package marking package option 4.63 - 40c to +125c SGM803-lxn3 803l tape and reel, 3000 4.38 - 40c to +125c SGM803-mxn3 803m tape and reel, 3000 3.08 - 40c to +125c SGM803-txn3 803t tape and reel, 3000 2.93 - 40c to +125c SGM803-sxn3 803s tape and reel, 3000 2.63 - 40c to +125c SGM803-rxn3 803r tape and reel, 3000 SGM803 2.32 - 40c to +125c SGM803-zxn3 803z tape and reel, 3000 4.63 - 40c to +125c sgm809-lxn3 809l tape and reel, 3000 4.38 - 40c to +125c sgm809-mxn3 809m tape and reel, 3000 4.00 - 40c to +125c sgm809-jxn3 809j tape and reel, 3000 3.08 - 40c to +125c sgm809-txn3 809t tape and reel, 3000 2.93 - 40c to +125c sgm809-sxn3 809s tape and reel, 3000 2.63 - 40c to +125c sgm809-rxn3 809r tape and reel, 3000 2.32 - 40c to +125c sgm809-zxn3 809z tape and reel, 3000 sgm809 2.32 - 40c to +125c sgm809-zxn3l 809zl tape and reel, 3000 4.63 - 40c to +125c sgm810-lxn3 810l tape and reel, 3000 4.38 - 40c to +125c sgm810-mxn3 810m tape and reel, 3000 4.00 - 40c to +125c sgm810-jxn3 810j tape and reel, 3000 3.08 - 40c to +125c sgm810-txn3 810t tape and reel, 3000 2.93 - 40c to +125c sgm810-sxn3 810s tape and reel, 3000 2.63 - 40c to +125c sgm810-rxn3 810r tape and reel, 3000 sgm810 2.32 - 40c to +125c sgm810-zxn3 810z tape and reel, 3000
SGM803/809/810 3 absolute maximum ratings (typical values are at t a = 25c, unless otherwise noted.) v cc ................................................................................?0.3 v to +6 v reset , reset ...............................................?0.3 v to v cc +0.3 v input current , v cc .................................................................20 ma output current, reset , reset ......................................... 20 ma rate of rise, v cc .................................................................100 v/s power dissipation, p d @ t a = 25 sot23-3 .....................................................................................0.4w package thermal resistance sot23-3, ja ....................................................................... 250 /w operating temperature range....... ........ ............- 40c to +125c junction temperature....... ............ ............ ........ ........... .........+150c storage temperature. ............ ............ ............ ........- 65c to +150c lead temperature (soldering, 10s)... ........... ........... ............+260c esd susceptibility hbm........... ................. ............ ........... .......... ........... .......... ........4000v mm..............................................................................................400v stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not imp lied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. pin description pin number name SGM803 sgm809 sgm809- zxn3l sgm810 function gnd 1 1 2 1 ground reset 2 2 1 ? active low reset. reset remains low while v cc is below the reset threshold, and remains low for 240 ms (typ) after v cc rises above the reset threshold. reset ? ? ? 2 active high reset. reset remains high while v cc is below the reset threshold, and remains high for 240 ms (typ) after v cc rises above the reset threshold. v cc 3 3 3 3 power supply voltage that is monitored.
SGM803/809/810 electrical characteristics (v cc typ = 5 v for l/m/j models, 3.3 v for t/s models, 3 v fo r r models, 2.5 v for z models; unless otherwise noted.) parameter conditions min typ max units supply t a = 0c to 70c 1.0 5.5 v voltage t a = - 40c to +125c 1.2 5.5 v v cc < 5.5 v, sgm8_l/m/j, t a = 25c 20 30 a v cc < 5.5 v, sgm8_l/m/j, t a = - 40c to +125c 50 a v cc < 3.6 v, sgm8_r/s/t/z, t a = 25c 17 25 a current v cc < 3.6 v, sgm8_r/s/t/z, t a = - 40c to +125c 45 a reset voltage threshold t a = 25c 4.537 4.63 4.723 v sgm8_l t a = - 40c to +125c 4.40 4.86 v t a = 25c 4.292 4.38 4.468 v sgm8_m t a = - 40c to +125c 4.16 4.56 v t a = 25c 3.92 4.00 4.08 v sgm809j/sgm810j t a = - 40c to +125c 3.8 4.2 v t a = 25c 3.003 3.08 3.157 v sgm8_t t a = - 40c to +125c 2.92 3.23 v t a = 25c 2.857 2.93 3.003 v sgm8_s t a = - 40c to +125c 2.78 3.08 v t a = 25c 2.564 2.63 2.696 v sgm8_r t a = - 40c to +125c 2.50 2.76 v t a = 25c 2.262 2.32 2.378 v sgm8_z t a = - 40c to +125c 2.22 2.42 v reset threshold temperature coefficient 30 ppm/c v cc to reset/ reset delay v cc = v th to (v th ?100 mv) 20 s t a = - 40c to +85c 160 240 560 ms reset active timeout period t a = - 40c to +125c 100 840 ms reset/ reset output voltage low (SGM803r/s/t/z) low (sgm809r/s/t/z) v cc = v th(min) , i sink = 1.2ma 0.3 v low (SGM803l/m/j) low (sgm809l/m/j) v cc = v th(min) , i sink = 3.2ma 0.4 v low (SGM803r/s/t/l/m/j/z) low (sgm809r/s/t/l/m/j/z) v cc > 1.0 v, i sin k = 50a 0.3 v high (sgm809r/s/t/z) v cc > v th(max) , i source = 500a 0.8v cc v high (sgm809l/m/j) v cc > v th(max) , i source = 800a v cc ? 1.5 v low (sgm810r/s/t/z) v cc = v th(max) , i sink = 1.2ma 0.3 v low (sgm810l/m/j) v cc = v th(max) , i sink = 3.2ma 0.4 v high (sgm810 r/s/t/l/m/j) 1.8 v < v cc < v th(min) , i source = 150a 0.8v cc v reset open-drain output leakage current (SGM803) v cc > v th , reset de-asserted 1 a specifications subject to change without notice.
SGM803/809/810 typical performance characteristics power-down reset delay vs.temperature 0 50 100 150 200 250 -50 -30 -10 10 30 50 70 90 110 130 temperature( ) power-down reset (s) sgm8_l/m/j v od = v th - v cc v od = 10mv v od = 20mv v od = 100mv v od = 200mv power-down reset delay vs.temperature 0 50 100 150 200 250 300 -50 -30 -10 10 30 50 70 90 110 130 temperature( ) power-down reset (s) sgm8_t/s/r/z v od = v th - v cc v od = 10mv v od = 20mv v od = 100mv v od = 200mv power-up reset delay vs.temperature 248 250 252 254 256 258 260 262 264 -50 -30 -10 10 30 50 70 90 110 130 temperature( ) power-down reset (ms) sgm809s supply current vs. temperature (no load) 0 5 10 15 20 25 30 -50 -30 -10 10 30 50 70 90 110 130 temperature( ) supply current ( a) v cc = 5.5v v cc = 3.6v normalized reset voltage threshold vs. temperature 0.988 0.99 0.992 0.994 0.996 0.998 1 1.002 1.004 1.006 1.008 -50 -30 -10 10 30 50 70 90 110 130 temperature( ) normalized reset threshold 0 50 100 150 200 250 300 350 400 1 10 100 1000 maximum transient duration (s) sgm8_l/m/j sgm8_r/s/t/z maximum transient duration without causing a reset pulse vs. reset comparator overdrive reset comparator overdrive , v th - v cc (mv)
SGM803/809/810 typical performance characteristics reset output voltage vs. supply voltage 200ms/div 2v/div supply voltage reset output 5v p-p voltage sgm809s sgm809r
SGM803/809/810 application notes benefits of an accurate reset threshold in other microprocessor supervisory circuits, tolerances in supply voltages lead to an overall increase in reset tolerance levels due to the deterioration of the microprocessor reset circuit?s power supply. the possibi lity of a malfunction during a power failure is greatly reduced because the SGM803/ sgm809/sgm810 series can operate effectively even when there are large degradations of the supply voltages. another advantage of the SGM803/ sgm809/sgm810 series is its very accurate internal voltage reference circuit. these benefits combine to produce an exceptionally reliable voltage monitor circuit. interfacing to microprocessors with multiple interrupts in a number of cases, it is necessary to interface many interrupts from different devices (for example, thermal, altitude, and velocity sensors). the SGM803/sgm809/sgm810 can easily be integrated into existing interrupt-handling circuits, as shown in figure 1, or can be used as a standalone device. sgm809 gnd reset v cc v cc other sensing devices priority encoder 74ls147 4-line bcd to microprocessor figure 1. interfacing to microprocessors with multiple interrupts interfacing to other devices? output the SGM803/sgm809/sgm810 series is designed to integrate with as many devices as possible and, therefore, has a standard output dependent on v cc . this enables the parts to be used in both 3 v and 5 v, or any nominal voltage within the minimum and maximum specifications for v cc . this design simplifies interfacing this device to other devices. ensuring a valid reset output down to v cc = 0 v when v cc falls below 1.0 v, the SGM803/sgm809 reset no longer sinks current. a high impedance cmos logic input connected to reset may, therefore, drift to undetermined logic levels. to eliminate this problem, a 100k ? ? ? resistor should be connected from reset to ground. sgm809 gnd reset v cc v cc figure 2. ensuring a valid reset output down to v cc = 0v
SGM803/809/810 package outline dimensions sot23-3 d e1 b a2 a a1 e l l c e1 0 0.20 e dimensions in millimeters dimensions in inches symbol min max min max a 1.050 1.250 0.041 0.049 a1 0.000 0.100 0.000 0.004 a2 1.050 1.150 0.041 0.045 b 0.300 0.400 0.012 0.016 c 0.100 0.200 0.004 0.008 d 2.820 3.020 0.111 0.119 e 1.500 1.700 0.059 0.067 e1 2.650 2.950 0.104 0.116 e 0.950typ 0.037typ e1 1.800 2.000 0.071 0.079 l 0.700ref 0.028ref l1 0.300 0.600 0.012 0.024 0 8 0 8
SGM803/809/810 revision history location page 11/06? data sheet changed from rev. a to rev. b changes to absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 shengbang microelectronics co, ltd unit 3, chuangye plaza no.5, taihu northern street, yingbin road centralized industrial park harbin development zone harbin, heilongjiang 150078 p.r. china tel.: 86-451-84348461 fax: 86-451-84308461 www.sg-micro.com
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