1 www.fairchildsemi.com fm809/810 3-pin c supervisor circuits www.fairchildsemi.com fm809/810 rev. c fm809/810 3-pin c supervisor circuits general description the fm809/810 are supervisor circuits that monitor power supply or other system voltages and issue reset pulses (fm809 = reset, fm810 = reset) when a fault condition exists. several threshold voltages are offered to accommodate system voltages of 5.0v, 3.3v, 3.0v and 2.7v with different tolerances. the low supply current (typically 2 a) recommends the devices for portable designs or wherever power saving is primary. the minimum reset delay is 140ms, but this may be changed to a value between 32-256ms. contact the factory for more informa- tion. features v th voltages of 4.63v, 4.38v, 4.00v, 3.08v, 2.93v and 2.63v (contact factory for lower values of v th ) reset (fm809) or reset (fm810) output typical operating circuit june 2001 140ms power-on reset delay (minimum) reset operation guaranteed to 1.0v supply current only 2 a no external components -40 c to +105 c operating range sot23-3 package applications microcontrollers and microprocessors appliances power-supply monitoring portable equipment automotive systems ?2001 fairchild semiconductor corporation fm809 c gnd v cc v cc gnd reset i/p reset connection diagram v cc 3 gnd reset (809) or reset (810) 1 2 fm809/810 sot23-3 package
2 www.fairchildsemi.com fm809/810 3-pin c supervisor circuits www.fairchildsemi.com fm809/810 rev. c absolute maximum ratings voltage on any terminal relative to gnd v cc -0.3v to +6.0v reset, reset -0.3v to (v cc + 0.3v) input current 20ma output current: reset, reset 20ma rate of rise of v cc 100v/ s continuous power dissipation (t a = +70 c) sot23-3 (derate 4mw/ c above +70 c) 320mw operating temperature range -40 c to +105 c storage temperature range -65 c to +150 c lead temperature (soldering, 10s) +300 c these are stress ratings only, and functional operation is not implied for these levels or beyond. exposure to absolute maximum rating conditions for extended periods may affect device reliability. electrical characteristics (t a = 25 c unless otherwise noted) v cc = full range, as noted under conditions. see note 1. parameter symbol conditions min typ max units (note 3) operating voltage v cc t a = 0 c to +70 c 1.0 5.5 v t a = -40 c to 85 c 1.1 5.5 supply current i cc t a = -40 c to 85 c, v cc < 5.5v 5 10 a fm809j/l/m t a = -40 c to 85 c, v cc < 3.6v 2 6 fm809r/s/t reset threshold v th fm8xxl t a = -40 c to +105 c 4.40 4.63 4.86 v fm8xxm t a = -40 c to +105 c 4.18 4.38 4.52 fm8xxj t a = -40 c to +105 c 3.90 4.00 4.18 fm8xxt t a = -40 c to +105 c 2.97 3.08 3.19 fm8xxs t a = -40 c to +105 c 2.79 2.93 3.00 fm8xxr t a = -40 c to +105 c 2.49 2.63 2.70 reset threshold tempco 30 ppm/ c v cc to reset delay (note 2) v cc = v th to (v th - 100mv) 10 s reset active timout period t a = -40 c to +85 c 140 256 560 ms fm809 output low (reset) v ol v cc = v th (min), i sink = 1.2ma, 0.3 v fm809r/s/t v cc = v th (min), i sink = 3.2ma, 0.4 fm809j/l/m v cc = < 1.0v, i sink = 50 a 0.3 fm809 output high (reset) v oh v cc > v th (max), i source = 500 a 0.8v cc v v cc > v th (max), i source = 800 av cc - 1.5v fm810 output low (reset) v ol v cc = v th (max), i sink = 1.2ma, 0.3 v fm810r/s/t v cc = v th (max), i sink = 3.2ma, 0.4 fm810j/l/m fm810 output high (reset) v oh 1.8v < v cc < v th (min), i source = 150 a 0.8v cc v note 1: testing in production is 25 c only. limits over temperature are guaranteed by design. note 2: reset output is for fm809. reset output is for fm810. note 3: typical values are at 25 c.
3 www.fairchildsemi.com fm809/810 3-pin c supervisor circuits www.fairchildsemi.com fm809/810 rev. c pin descriptions pin number name function 1 gnd ground 2 reset* reset (reset) remains low (high) while v cc is below v th , and for at least 140ms after v cc rises above v th . 3v cc * with overbar, fm809 (reset); without, fm810 (reset). circuit timing (ex: fm809) when operating properly with 5v in (for example), v out will also be about 5v. when v in starts to fall, v out will follow it down as shown. when v in drops below v th , v out drops to ground ("issues a reset") and stays there unless v in also falls below its minimum operating voltage, approx. 1v. at this point, the supervisor loses control, and its output may rise, only to again follow v in down to the ground. when v in begins to rise, v out follows it until 1.0v or so is reached, whereupon the device regains control, v out is pulled to ground, etc. when v in rises above v th , v out comes out of reset 140 ms later. if it is required that a lower value than gnd + 1.0v is needed on reset signal during v cc 1v, a 100k resistor may be used on the device output (to gnd for the fm809, to v cc for the fm810). 5v v th 1v gnd 5v v th 1v gnd input output 140ms
4 www.fairchildsemi.com fm809/810 3-pin c supervisor circuits www.fairchildsemi.com fm809/810 rev. c typical operating characteristics supply current vs. temperature power up reset timeout vs. temperature 0 2 4 6 8 10 0 2 4 6 8 10 +110c +25c -55c temperature (c) i cc ( a) v cc = 5v v cc = 3.3v 100 200 300 400 500 600 100 200 300 400 500 600 +105c +25c -40c temperature (c) power up reset timeout (ms)
5 www.fairchildsemi.com fm809/810 3-pin c supervisor circuits www.fairchildsemi.com fm809/810 rev. c ordering information (fm809) part top reset reset pulse output package number markingthreshold (v) width (ms) type type fm809ls3 09l 4.63 256 push-pull, active low 3-pin, sot23 fm809ms3 09m 4.38 256 push-pull, active low 3-pin, sot23 fm809js3 09j 4.00 256 push-pull, active low 3-pin, sot23 fm809ts3 09t 3.08 256 push-pull, active low 3-pin, sot23 fm809ss3 09s 2.93 256 push-pull, active low 3-pin, sot23 fm809rs3 09r 2.63 256 push-pull, active low 3-pin, sot23 fm809les3 (note 4) 09le 4.63 32 push-pull, active low 3-pin, sot23 fm809mes3 (note 4) 09me 4.38 32 push-pull, active low 3-pin, sot23 fm809jes3 (note 4) 09je 4.00 32 push-pull, active low 3-pin, sot23 fm809tes3 (note 4) 09te 3.08 32 push-pull, active low 3-pin, sot23 fm809ses3 (note 4) 09se 2.93 32 push-pull, active low 3-pin, sot23 fm809res3 (note 4) 09re 2.63 32 push-pull, active low 3-pin, sot23 fm809lfs3 (note 4) 09lf 4.63 64 push-pull, active low 3-pin, sot23 fm809mfs3 (note 4) 09mf 4.38 64 push-pull, active low 3-pin, sot23 fm809jfs3 (note 4) 09jf 4.00 64 push-pull, active low 3-pin, sot23 fm809tfs3 (note 4) 09tf 3.08 64 push-pull, active low 3-pin, sot23 fm809sfs3 (note 4) 09sf 2.93 64 push-pull, active low 3-pin, sot23 fm809rfs3 (note 4) 09rf 2.63 64 push-pull, active low 3-pin, sot23 fm809lhs3 (note 4) 09lh 4.63 128 push-pull, active low 3-pin, sot23 fm809mhs3 (note 4) 09mh 4.38 128 push-pull, active low 3-pin, sot23 fm809jhs3 (note 4) 09jh 4.00 128 push-pull, active low 3-pin, sot23 fm809ths3 (note 4) 09th 3.08 128 push-pull, active low 3-pin, sot23 fm809shs3 (note 4) 09sh 2.93 128 push-pull, active low 3-pin, sot23 FM809RHS3 (note 4) 09rh 2.63 128 push-pull, active low 3-pin, sot23 note 4: these devices are available upon special request only. please contact fairchild sales for availability and minimum ordering req uirements.
6 www.fairchildsemi.com fm809/810 3-pin c supervisor circuits www.fairchildsemi.com fm809/810 rev. c ordering information (fm810) part top reset reset pulse output package number markingthreshold (v) width (ms) type type fm810ls3 10l 4.63 256 push-pull, active high 3-pin, sot23 fm810ms3 10m 4.38 256 push-pull, active high 3-pin, sot23 fm810js3 10j 4.00 256 push-pull, active high 3-pin, sot23 fm810ts3 10t 3.08 256 push-pull, active high 3-pin, sot23 fm810ss3 10s 2.93 256 push-pull, active high 3-pin, sot23 fm810rs3 10r 2.63 256 push-pull, active high 3-pin, sot23 fm810les3 (note 5) 10le 4.63 32 push-pull, active high 3-pin, sot23 fm810mes3 (note 5) 10me 4.38 32 push-pull, active high 3-pin, sot23 fm810jes3 (note 5) 10je 4.00 32 push-pull, active high 3-pin, sot23 fm810tes3 (note 5) 10te 3.08 32 push-pull, active high 3-pin, sot23 fm810ses3 (note 5) 10se 2.93 32 push-pull, active high 3-pin, sot23 fm810res3 (note 5) 10re 2.63 32 push-pull, active high 3-pin, sot23 fm810lfs3 (note 5) 10lf 4.63 64 push-pull, active high 3-pin, sot23 fm810mfs3 (note 5) 10mf 4.38 64 push-pull, active high 3-pin, sot23 fm810jfs3 (note 5) 10jf 4.00 64 push-pull, active high 3-pin, sot23 fm810tfs3 (note 5) 10tf 3.08 64 push-pull, active high 3-pin, sot23 fm810sfs3 (note 5) 10sf 2.93 64 push-pull, active high 3-pin, sot23 fm810rfs3 (note 5) 10rf 2.63 64 push-pull, active high 3-pin, sot23 fm810lhs3 (note 5) 10lh 4.63 128 push-pull, active high 3-pin, sot23 fm810mhs3 (note 5) 10mh 4.38 128 push-pull, active high 3-pin, sot23 fm810jhs3 (note 5) 10jh 4.00 128 push-pull, active high 3-pin, sot23 fm810ths3 (note 5) 10th 3.08 128 push-pull, active high 3-pin, sot23 fm810shs3 (note 5) 10sh 2.93 128 push-pull, active high 3-pin, sot23 fm810rhs3 (note 5) 10rh 2.63 128 push-pull, active high 3-pin, sot23 note 5: these devices are available upon special request only. please contact fairchild sales for availability and minimum ordering req uirements.
7 www.fairchildsemi.com fm809/810 3-pin c supervisor circuits www.fairchildsemi.com fm809/810 rev. c fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and fai rchild reserves the right at any time without notice to change said circuitry and specifications. life support policy fairchild's products are not authorized for use as critical components in life support devices or systems without the express w ritten approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably ex- pected to cause the failure of the life support device or system, or to affect its safety or effectiveness. fairchild semiconductor fairchild semiconductor fairchild semiconductor fairchild semiconductor americas europe hong kong japan ltd. customer response center fax: +44 (0) 1793-856858 8/f, room 808, empire centre 4f, natsume bldg. tel. 1-888-522-5372 deutsch tel: +49 (0) 8141-6102-0 68 mody road, tsimshatsui east 2-18-6, yushima, bunkyo-ku english tel: +44 (0) 1793-856856 kowloon. hong kong tokyo, 113-0034 japan fran?ais tel: +33 (0) 1-6930-3696 tel; +852-2722-8338 tel: 81-3-3818-8840 italiano tel: +39 (0) 2-249111-1 fax: +852-2722-8383 fax: 81-3-3818-8841 0.96~1.14 0.12 0.03~0.10 0.38 ref 0.40 0.03 2.90 0.10 0.95 0.03 0.95 0.03 1.90 0.03 0.508ref 0.97ref 1.30 0.10 0.45~0.60 2.40 0.10 +0.05 0.023 0.20 min 0.40 0.03 physical dimensions inches (millimeters) unless otherwise noted dimensions in millimeters sot-23 package dimensions fs pkg code au
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