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sgm803/sgm809/sgm810 microprocessor supervisory circuit in 3-pin sot-23 general description the sgm803/sgm809/sgm810 supervisory circuits monitor the power supply voltage in microprocessor and digital systems. they provide a reset output during power-up, power-down and brownout conditions. on power-up, an internal timer holds reset asserted for 240ms. this holds the microprocessor in a reset state until conditions have stabilized. the reset output remains operational with v cc as low as 1v. the sgm803/ sgm809 provides an active low reset signal ( reset ) while the sgm810 provides an active high signal (reset) output. the sgm809/sgm810 has push-pull outputs, whereas the sgm803 has an open-drain output, which requires an external pull-up resistor. eight reset threshold voltage options are available suitable for monitoring 1.8v, 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 13 a makes the sgm803/sgm809/sgm810 ideal for use in portable, battery operated equipment. all are specified over the extended -40 to +125 temperature range. typical operation circuit microprocessor system sgm803/sgm809 gnd reset reset gnd v cc v cc r pull-up sgm803 only features precision voltage monitor: 1.8v, 2.5v, 3v, 3.3v, 5v options superior upgrade for max803/max809/max810 and adm803/adm809/adm810 fully specified over temperature low power consumption (13 a typ) reset assertion down to 1v v cc 150ms min power-on reset open-drain reset output (sgm803) push-pull reset output (sgm809) push-pull reset output (sgm810) -40 to +125 operating temperature range small packaging sgm803 available in sot-23-3 and sot-23 sgm809 available in sot-23-3 and sot-23 sgm810 available in sot-23-3 and sot-23 applications microprocessor systems controllers intelligent instruments automotive systems safety systems portable instruments pin configurations (top view) 1 2 sot-23-3 / sot-23 gnd v cc 3 reset/reset sgm803 sgm809 sgm810 rev. e. 1 sg micro corp www.sg-micro.com
microprocessor supervisory circuit in 3-pin sot-23 2 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com package/ordering information model reset threshold (v) package description ordering number package marking package option 4.63 sot-23-3 sgm803-lxn3/tr 803l tape and reel, 3000 4.63 sot-23 sgm803-lxn3l/tr 803ll tape and reel, 3000 4.38 sot-23-3 sgm803-mxn3/tr 803m tape and reel, 3000 4.38 sot-23 sgm803-mxn3l/tr 803ml tape and reel, 3000 4.00 sot-23-3 sgm803-jxn3/tr 803j tape and reel, 3000 4.00 sot-23 sgm803-jxn3l/tr 803jl tape and reel, 3000 3.08 sot-23-3 sgm803-txn3/tr 803t tape and reel, 3000 3.08 sot-23 sgm803-txn3l/tr 803tl tape and reel, 3000 2.93 sot-23-3 sgm803-sxn3/tr 803s tape and reel, 3000 2.93 sot-23 sgm803-sxn3l/tr 803sl tape and reel, 3000 2.63 sot-23-3 sgm803-rxn3/tr 803r tape and reel, 3000 2.63 sot-23 sgm803-rxn3l/tr 803rl tape and reel, 3000 2.32 sot-23-3 sgm803-zxn3/tr 803z tape and reel, 3000 2.32 sot-23 sgm803-zxn3l/tr 803zl tape and reel, 3000 1.63 sot-23-3 sgm803-xxn3/tr 803x tape and reel, 3000 sgm803 1.63 sot-23 sgm803-xxn3l/tr 803xl tape and reel, 3000 4.63 sot-23-3 sgm809-lxn3/tr 809l tape and reel, 3000 4.63 sot-23 sgm809-lxn3l/tr 809ll tape and reel, 3000 4.38 sot-23-3 sgm809-mxn3/tr 809m tape and reel, 3000 4.38 sot-23 sgm809-mxn3l/tr 809ml tape and reel, 3000 4.00 sot-23-3 sgm809-jxn3/tr 809j tape and reel, 3000 4.00 sot-23 sgm809-jxn3l/tr 809jl tape and reel, 3000 3.08 sot-23-3 sgm809-txn3/tr 809t tape and reel, 3000 3.08 sot-23 sgm809-txn3l/tr 809tl tape and reel, 3000 2.93 sot-23-3 sgm809-sxn3/tr 809s tape and reel, 3000 2.93 sot-23 sgm809-sxn3l/tr 809sl tape and reel, 3000 2.63 sot-23-3 sgm809-rxn3/tr 809r tape and reel, 3000 2.63 sot-23 sgm809-rxn3l/tr 809rl tape and reel, 3000 2.32 sot-23-3 sgm809-zxn3/tr 809z tape and reel, 3000 2.32 sot-23 sgm809-zxn3l/tr 809zl tape and reel, 3000 1.63 sot-23-3 sgm809-xxn3/tr 809x tape and reel, 3000 sgm809 1.63 sot-23 sgm809-xxn3l/tr 809xl tape and reel, 3000
microprocessor supervisory circuit in 3-pin sot-23 3 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com package/ordering information (cont.) model reset threshold (v) package description ordering number package marking package option 4.63 sot-23-3 sgm810-lxn3/tr 810l tape and reel, 3000 4.63 sot-23 sgm810-lxn3l/tr 810ll tape and reel, 3000 4.38 sot-23-3 sgm810-mxn3/tr 810m tape and reel, 3000 4.38 sot-23 sgm810-mxn3l/tr 810ml tape and reel, 3000 4.00 sot-23-3 sgm810-jxn3/tr 810j tape and reel, 3000 4.00 sot-23 sgm810-jxn3l/tr 810jl tape and reel, 3000 3.08 sot-23-3 sgm810-txn3/tr 810t tape and reel, 3000 3.08 sot-23 sgm810-txn3l/tr 810tl tape and reel, 3000 2.93 sot-23-3 sgm810-sxn3/tr 810s tape and reel, 3000 2.93 sot-23 sgm810-sxn3l/tr 810sl tape and reel, 3000 2.63 sot-23-3 sgm810-rxn3/tr 810r tape and reel, 3000 2.63 sot-23 sgm810-rxn3l/tr 810rl tape and reel, 3000 2.32 sot-23-3 sgm810-zxn3/tr 810z tape and reel, 3000 2.32 sot-23 sgm810-zxn3l/tr 810zl tape and reel, 3000 1.63 sot-23-3 sgm810-xxn3/tr 810x tape and reel, 3000 sgm810 1.63 sot-23 sgm810-xxn3l/tr 810xl tape and reel, 3000
microprocessor supervisory circuit in 3-pin sot-23 4 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com absolute maximum ratings (typical values are at t a = 25c, unless otherwise noted.) v cc ............................................................................-0.3v to 6v reset , reset ............................................-0.3v to v cc + 0.3v input current, v cc ...................... ............... ............... .........20ma output current, reset , reset ???????????..20ma rate of rise, v cc ...........................................................100v/ s power dissipation, p d @ t a = 25 sot-23-3 ............................................................................0.4w package thermal resistance sot-23-3, ja ............................................................... 250 /w operating temperature range..........................-40c to +125c junction temperature................. ........................ ...............150c storage temperature....... ................ .................-65 c to +150c lead temperature (soldering, 10s)...................................260c esd susceptibility hbm.............. ......................... ................ ................... ........4000v mm......................................................................................400v note: 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 thos e indicated in the operational sections of the specifications is not implied. exposure to absolute ma ximum rating conditions for extended periods may affect device rel iability. caution this integrated circuit can be damaged by esd if you don?t pa y attention to esd protection. sg micro recommends that all this integrated circuit can be damaged by esd if you don?t pay atte ntion to esd protecti on. sgmicro recommends that all integrated circuits be handled with appropriate precautions. failure to obse rve proper handling and installation procedures can cause dama ge. esd damage can range from subtle performance degradation to comple te device failure. precision integrated circuits may be more susceptible to damage because very small parametric changes co uld cause the device not to meet its published specifications. sgmicro reserves the right to make any chan ge in circuit design, specification or other related things if necessary without not ice at any time. please contact sgmicro sales office to get the last datasheet. pin description pin number name sgm803 sgm809 sgm810 function gnd 1 1 1 ground reset 2 2 ? active low reset. reset remains low while v cc is below the reset threshold, and remains low for 240ms (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 240ms (typ) after v cc rises above the reset threshold. v cc 3 3 3 power supply voltage that is monitored.
microprocessor supervisory circuit in 3-pin sot-23 5 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com electrical characteristics (v cc typ = 5v for l/m/j models, 3.3v for t/s models, 3v for r model s, 2.5v for z models, 1.8v for x models; unless otherwise noted. ) parameter conditions min typ max units supply t a = 0 to +70 1.0 5.5 v voltage t a = -40 to +125 1.2 5.5 v v cc < 5.5v, sgm8_l/m/j, t a = +25 17 30 a v cc < 5.5v, sgm8_l/m/j, t a = -40 to +125 50 a v cc < 3.6v, sgm8_r/s/t/z/x, t a = +25 13 25 a current v cc < 3.6v, sgm8_r/s/t/z/x, t a = -40 to +125 45 a reset voltage threshold t a = +25 4.537 4.63 4.723 v sgm8_l t a = -40 to +125 4.40 4.86 v t a = +25 4.292 4.38 4.468 v sgm8_m t a = -40 to +125 4.16 4.56 v t a = +25 3.92 4.00 4.08 v sgm8_j t a = -40 to +125 3.8 4.2 v t a = +25 3.003 3.08 3.157 v sgm8_t t a = -40 to +125 2.92 3.23 v t a = +25 2.857 2.93 3.003 v sgm8_s t a = -40 to +125 2.78 3.08 v t a = +25 2.564 2.63 2.696 v sgm8_r t a = -40 to +125 2.50 2.76 v t a = +25 2.262 2.32 2.378 v sgm8_z t a = -40 to +125 2.22 2.42 v t a = +25 1.589 1.63 1.671 v sgm8_x t a = -40 to +125 1.55 1.71 v reset threshold temperature coefficient 30 ppm/ v cc to reset/ reset delay v cc = v th to (v th ? 100mv) 20 s t a = -40 to +85 150 240 560 ms reset active timeout period t a = -40 to +125 100 840 ms reset/ reset output voltage low (sgm803r/s/t/z/x) low (sgm809r/s/t/z/x) 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/x) low (sgm809r/s/t/l/m/j/z/x) v cc > 1.0v, i sink = 50 a 0.3 v high (sgm809r/s/t/z/x) v cc > v th(max) , i source = 500 a 0.8 v cc v high (sgm809l/m/j) v cc > v th(max) , i source = 800 a v cc - 1.5 v low (sgm810r/s/t/z/x) 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 (sgm810r/s/t/l/ m/j) 1.8v < v cc < v th(min) , i source = 150 a 0.8 v cc v reset open-drain output leakage current (sgm803) v cc > v th , reset de-asserted 1 a
microprocessor supervisory circuit in 3-pin sot-23 6 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com 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-up reset delay vs. temperature 220 225 230 235 240 245 250 255 260 265 270 -50 -30 -10 10 30 50 70 90 110 130 temperature () power-down reset (ms) sgm8_s 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 power-down reset delay vs. temperature 0 50 100 150 200 250 300 -50-30-101030507090110130 temperature () power-down r eset (s) sgm8_t/s/r/z v od = v th - v cc v od = 10mv v od = 20mv v od = 100mv v od = 200mv 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 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)
microprocessor supervisory circuit in 3-pin sot-23 7 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com typical performance characteristics reset output voltage vs. supply voltage 200ms/div 2v/div supply voltage reset output 5v p-p voltage sgm809s sgm809r
microprocessor supervisory circuit in 3-pin sot-23 8 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com 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 possibility 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 seri es 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 3v and 5v, 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 = 0v when v cc falls below 1.0v, the sgm803/sgm809 reset no longer sinks current. a high impedance cmos logic input connected to reset may, therefore, drif t 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 preventing the high voltage spike and low power design to prevent the high voltage spike damage or input v cc current limitation low power design, it is always to connect a resistor r1(0 ? to 1k ? ) in series to v cc , for such application, one capacitance c1(0.1f to 4.7f) should be connected between v cc pin and gnd. the schematic is shown in figure 3. the input resistor will affect output driving capability. sgm809 gnd reset v cc output in r1 0 ~ 1k c1 0.1f ~ 4.7f figure 3. preventing the high voltage spike and low power design .
microprocessor supervisory circuit in 3-pin sot-23 9 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com detailed descriptions reset timing the reset signal is asserted low for the sgm809 and high for the sgm810 when the power supply voltage falls below the threshold trip voltage and remains asserted for at least 150ms after the power supply voltage has risen above the threshold. power supply voltage 5v 0v 5v 0v 5v 0v reset threshold voltage 150ms minimum reset timeout period sgm809 sgm810 reset figure 4. reset timing diagram
microprocessor supervisory circuit in 3-pin sot-23 10 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com package outline dimensions sot-23-3 e e1 e1 e b d a a2 a1 c l 0.2 0.95 0.69 0.99 2.59 1.90 recommended land pattern (unit: mm) 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 0.500 0.012 0.020 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 0.950 bsc 0.037 bsc e1 1.900 bsc 0.075 bsc l 0.300 0.600 0.012 0.024 0 8 0 8
microprocessor supervisory circuit in 3-pin sot-23 11 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com package outline dimensions sot-23 e e1 e1 e b d a a2 a1 c l1 0.25 l 2.29 0.76 0.76 0.95 recommended land pattern (unit: mm) dimensions in millimeters dimensions in inches symbol min max min max a 0.900 1.150 0.035 0.045 a1 0.000 0.100 0.000 0.004 a2 0.900 1.050 0.035 0.041 b 0.300 0.500 0.012 0.020 c 0.080 0.150 0.003 0.006 d 2.800 3.000 0.110 0.118 e 1.200 1.400 0.047 0.055 e1 2.250 2.550 0.089 0.100 e 0.950 bsc 0.037 bsc e1 1.900 bsc 0.075 bsc l 0.550 ref 0.022 ref l1 0.300 0.500 0.012 0.020 0 8 0 8
microprocessor supervisory circuit in 3-pin sot-23 12 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com tape and reel information note: the picture is only for reference. please make the object as the standard. key parameter list of tape and reel package type reel diameter reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p0 (mm) p1 (mm) p2 (mm) w (mm) pin1 quadrant sot-23-3 7 9.0 3.2 3.3 1.3 4.0 4.0 2.0 8.0 q3 sot-23 7 9.5 3.15 2.77 1.22 4.0 4.0 2.0 8.0 q3 reel width (w1) reel diameter reel dimensions tape dimensions direction of feed p2 p0 w p1 a0 k0 b0 q1 q2 q4 q3 q3 q4 q2 q1 q3 q4 q2 q1
microprocessor supervisory circuit in 3-pin sot-23 13 sgm803/sgm809/sgm810 sg micro corp www.sg-micro.com carton box dimensions note: the picture is only for reference. please make the object as the standard. key parameter list of carton box reel type length (mm) width (mm) height (mm) pizza/carton 7 (option) 368 227 224 8 7 442 410 224 18

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