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cat811, cat812 ? 2010 scillc. all rights reserved. 1 doc. no. md-3005 rev. v characteristics subject to change without notice 4-pin microprocessor power supply supervisors with manual reset features ? precision monitoring of +5.0 v ( 5%, 10%, 20%), +3.3 v ( 5%, 10%), +3.0 v ( 10%) and +2.5 v ( 5%) power supplies ? manual reset input ? offered in two output configurations: ? cat811: active low reset ? cat812: active high reset ? direct replacements for the max811 and max812 in applications operating over the industrial temperature range ? reset valid down to v cc = 1.0v ? 6a power supply current ? power supply transient immunity ? available in sot-143 packages with sn or nipdau green lead finishes. ? industrial temperature range: -40oc to +85oc application ? computers, servers, laptops ? cable modems ? wireless communications ? embedded control systems ? white goods ? power meters ? intelligent instruments ? pdas and handheld equipment description the cat811 and cat812 are microprocessor supervi- sory circuits that monitor power supplies. the cat811 and cat812 are direct replacements for the max811 and max812 in applications operating over the industrial temperature range; both have a manual reset input. these devices generate a reset signal, which is asserted while the power supply voltage is below a preset threshold level and for at least 140ms after the power supply level has risen above that level. the underlying floating gate technology, ae 2(tm) used by catalyst semiconductor, makes it possible to offer any custom reset threshold value. seven industry standard threshold levels are offered to support +5.0v, +3.3v, +3.0v and +2.5v systems. the cat811 features a reset push-pull output (active low) and the cat812 features a reset push-pull output (active high). fast transients on the power supply are ignored and the output is guaranteed to be in the correct state at vcc levels as low as 1.0 v. the cat811/812 are fully specified over the industrial temperature range (-40c to 85c) and are available in a compact 4-pin sot-143 package. for ordering information details, see page 10. threshold suffix selector description nominal threshold voltage threshold suffix designation 4.63v l 4.38v m 4.00v j 3.08v t 2.93v s 2.63v r 2.32v z pin configuration cat811 cat812 1 4 v cc gnd reset 2 3 mr
cat811, cat812 doc. no. md-3005 rev. v 2 ? 2010 scillc. all rights reserved. characteristics subject to change without notice pin description pin number name description cat811 cat812 1 1 gnd ground 2 ? reset active low reset. reset is asserted if v cc falls below the reset threshold and remains low for at least 140ms after v cc rises above the reset threshold. ? 2 reset active high reset. reset is asserted if v cc falls below the reset threshold and remains high for at least 140ms after v cc rises above the reset threshold. 3 3 mr manual reset input. a logic low on mr asserts reset. reset remains active as long as mr is low and for 140ms after mr returns high. the active low input has an internal 20k ? pull-up resistor. the input should be left open if not used. 4 4 v cc power supply voltage that is monitored. block diagram cat812 v cc reset + ? reset & digital delay v cc tolerance bias voltage reference gnd cat811 v cc reset + ? reset & digital delay v cc tolerance bias voltage reference gnd v cc v cc mr mr
cat811, cat812 ? 2010 scillc. all rights reserved. 3 doc. no. md-3005 rev. v characteristics subject to change without notice absolute maximum ratings (1) parameters ratings units any pin with respect to ground -0.3 to + 6.0 v input current, v cc 20 ma output current reset, reset 20 ma rate of raise, v cc 100 v/s continuous power dissipations 320 mw derate 4mw/oc above +70oc (sot-143) storage temperature -65 to +105 oc operating ambient temperature -40 to +85 oc lead soldering (10 seconds) +300 oc electrical operating characteristics v cc = full range, t a = -40c to +85c unless otherwise noted. typical values at t a = +25c and v cc = 5v for the l/m/j versions, v cc = 3.3v for the t/s versions, v cc = 3v for the r version and v cc = 2.5v for the z version. parameter symbol conditions min typ max units v cc range t a = 0c to +70c 1.0 5.5 v t a = -40c to +85c 1.2 5.5 supply current i cc t a = -40 ? c to +85 ? c v cc < 5.5v, j/l/m 8 20 a v cc < 3.6v, r/s/t/z 6 15 reset threshold voltage v th l threshold t a = +25c 4.56 4.63 4.70 v t a = -40c to +85c 4.50 4.75 m threshold t a = +25c 4.31 4.38 4.45 t a = -40c to +85c 4.25 4.50 j threshold t a = +25c 3.93 4.00 4.06 t a = -40c to +85c 3.89 4.10 t threshold t a = +25c 3.04 3.08 3.11 t a = -40c to +85c 3.00 3.15 s threshold t a = +25c 2.89 2.93 2.96 t a = -40c to +85c 2.85 3.00 r threshold t a = +25c 2.59 2.63 2.66 t a = -40c to +85c 2.55 2.70 z threshold t a = +25c 2.28 2.32 2.35 t a = -40c to +85c 2.25 2.38 notes: (1) stresses above those listed under ?absolut e maximum ratings? may cause permanent dam age to the device. these are stress rat ings only, and functional operation of the device at these or any ot her conditions outside of those lis ted in the operational sectio ns of this specification is not implied. exposure to any absolute maximum rating for extended pe riods may affect device performance and re liability.
cat811, cat812 doc. no. md-3005 rev. v 4 ? 2010 scillc. all rights reserved. characteristics subject to change without notice electrical operating characteristics (continued) v cc = full range, t a = -40c to +85c unless otherwise noted. typical values at t a = +25c and v cc = 5v for the l/m/j versions, v cc = 3.3v for the t/s versions, v cc = 3v for the r version and v cc = 2.5v for the z version. parameter symbol conditions min typ (1) max units reset threshold tempco 30 ppm/ ? c v cc to reset delay (2) v cc = v th to (v th - 100mv) 20 s reset active timeout period t a = -40 ? c to +85 ? c 140 240 400 ms reset output voltage low (push-pull, active low, cat811) v ol v cc = v th min , i sink = 1.2ma cat811r/s/t/z 0.3 v v cc = v th min , i sink = 3.2ma cat811j/l/m 0.4 v cc > 1.0v, i sink = 50a 0.3 reset output voltage high (push-pull, active low, cat811) v oh v cc = v th max , i source = 500a cat811r/s/t/z 0.8v cc v v cc = v th max , i source = 800a cat811j/l/m v cc - 1.5 reset output voltage low (push-pull, active high, cat812) v ol v cc > v th max , i sink = 1.2ma cat812r/s/t/z 0.3 v v cc > v th max , i sink = 3.2ma cat812j/l/m 0.4 reset output voltage high (push-pull active high, cat812) v oh 1.8 v < v cc v th min , i source = 150a 0.8v cc v mr minimum pulse width t mr 10 s mr glitch immunity note 3 100 ns mr to reset propagation delay t md note 2 0.5 s mr input threshold v ih v cc > v th (max) , cat811/812l/m/j 2.3v v il 0.8 v v ih v cc > v ih (max) , cat811/812r/s/t/z 0.7v cc v il 0.25v cc mr pull-up resistance 10 20 75 k ? notes: (1) production testing done at t a = +25 ? c; limits over temperature guaranteed by design only. (2) reset output for the cat811; reset output for the cat812 (3) glitches of 100ns or less typically will not generate a reset pulse
cat811, cat812 ? 2010 scillc. all rights reserved. 5 doc. no. md-3005 rev. v characteristics subject to change without notice typical operating characteristics v cc = full range, t a = -40c to +85c unless otherwise noted. typical values at t a = +25c and v cc = 5v for the l/m/j versions, v cc = 3.3v for the t/s versions, v cc = 3v for the r version and v cc = 2.5v for the z version. supply current vs. temperature (no load, cat8xxr/s/t/z) 12 10 8 6 4 2 0 -50 0 50 100 150 supply current (a) temperature (c) power-down reset delay vs. temperature (cat8xxr/s/t/z) 14 12 10 8 6 4 2 0 power-down reset delay (s) temperature (c) power-up reset timeout vs. temperature 260 240 220 200 180 160 power-up reset timeout (ms) temperature (c) normalized reset threshold vs. temperature 1.0002 1 0.9998 0.9996 0.9994 0.9992 0.999 0.9988 0 20 40 60 80 100 120 normalized threshold temperature (c) v cc =3.6v v cc =5.5v -50 0 50 100 150 v cc =5v v cc =2.5v -50 0 50 100 150
cat811, cat812 doc. no. md-3005 rev. v 6 ? 2010 scillc. all rights reserved. characteristics subject to change without notice detailed description reset timing the reset signal is asserted low for the cat811 and high for the cat812 when the power supply voltage falls below the threshold trip voltage and remains asserted for at least 140ms after the power supply voltage has risen above the threshold. figure 1. reset timing diagram v cc transient response the cat811/812 protect ps against brownout failure. short duration transients of 4s or less and 100mv amplitude typically do not cause a false reset. figure 2 shows the maximum pulse duration of negative-going v cc transients that do not cause a reset condition. as the amplitude of the transient goes further below the threshold (increasing v th - v cc ), the maximum pulse duration decreases. in this test, the v cc starts from an initial voltage of 0.5v above the threshold and drops below it by the amplitude of the overdrive voltage (v th - v cc ). 30 25 20 15 10 5 0 transient duration (ms) reset overdrive v th - v cc (mv) 1 10 100 1000 t amb = 25c cat8xxm cat8xxz figure 2. maximum transient duration without causing a reset pulse vs. reset comparator overdrive 5v 0v 5v 0v 5v 0v cat811 cat812 threshold voltage 140ms minimum reset timeout period power supply v oltage reset reset
cat811, cat812 ? 2010 scillc. all rights reserved. 7 doc. no. md-3005 rev. v characteristics subject to change without notice valid reset with v cc under 1.0v to ensure that the cat811 reset pin is in a known state when v cc is under 1.0v, a 100k ? pull-down resistor between reset pin and gnd is recommended; the value is not critical. for the cat812, a pull-up resistor from reset pin to v cc is needed. figure 3. reset valid with v cc under 1.0v figure 4. reset valid with v cc under 1.1v bi-directional reset pin interfacing the cat811/812 can interface with p/c bi- directional reset pins by connecting a 4.7k ? resistor in series with the cat811/812 reset output and the p/c bi-directional reset pin. figure 5. bi-directional reset pin interfacing v cc gnd 100k ? cat811 mr reset power supply v cc gnd 100k ? cat812 mr reset power supply gnd 4.7k ? cat811 cat811 mr gnd buf reset input reset reset power supply p (for example: 68hc11) buffered bi-directional i/o pin v cc
cat811, cat812 doc. no. md-3005 rev. v 8 ? 2010 scillc. all rights reserved. characteristics subject to change without notice other supervisory products function cat1161/3 cat1162 cat809 cat810 cat811 cat812 with 16k bit serial eeprom memory ?? ?? ? ? ? ? watchdog timer ?? ? ? ? ? ? manual reset input ?? ?? ? ? ?? ?? active low reset ???? ???? active high reset ?? ? ????? dual polarity reset outputs ?? ?? ? ? ? ? package 8-pin dip and soic 8-pin dip and soic 3-pin sot-23 and sc70 3-pin sot-23 and sc70 4-pin sot-143 4-pin sot-143
cat811, cat812 ? 2010 scillc. all rights reserved. 9 doc. no. md-3005 rev. v characteristics subject to change without notice package outline drawing sot-143 4-lead (tb) (1) notes: (1) all dimensions are in millimeters. angles in degrees. (2) complies with jedec satndard to-253. e1 e a1 e e1 b b1 d c a a2 top view side view end view l1 l2 l symbol min nom max a 0.80 1.22 a1 0.05 0.15 a2 0.75 0.90 1.07 b 0.30 0.50 b2 0.76 0.89 c 0.08 0.20 d 2.80 2.90 3.04 e 2.10 2.64 e1 1.20 1.30 1.40 e 1.92 bsc e1 0.20 bsc l 0.40 0.50 0.60 l1 0.54 ref l2 0.25 0 8
cat811, cat812 doc. no. md-3005 rev. v 10 ? 2010 scillc. all rights reserved. characteristics subject to change without notice example of ordering information (1) notes: (1) all packages are rohs-comp liant (lead-free, halogen-free). (2) the standard lead finish is nipdau. cont act factory for other package availability. (3) this device used in the above example is a cat811stbi-gt10 (sot-143 4-lead, push-pull/active low output, trip level of 2.85 v to 3.00v, nipdau, tape & reel, 10,000/reel) (4) for additional package and temperatur e options, please contact your neares t on semiconductor sales office. prefix device # suffix cat 811 s tb i -g t10 company id trip level l: 4.63v m: 4.38v j: 4.00v t: 3.08v s: 2.93v r: 2.63v z: 2.32v product numbe r 811: push-pull/active low output 812: push-pull/active high output tape & reel t: tape & reel 3: 3,000/reel 10: 10,000/reel lead finish blank: matte-tin g: nipdau package tb: sot-143 temperature range i = industrial (-40oc to 85oc)
cat811, cat812 on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes with out further notice to any products herein. scillc makes no warrant y, representation or guarantee regarding the suitabilit y of its products for any pa rticular purpose, nor does scillc assume any liability arising out of the application or use of any product or circui t, 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. sci llc 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 officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly o r 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 manufact ure 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 literature fulfillment: literature distribution ce nter for on semiconducto r 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 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 on semiconductor website: www.onsemi.com order literature: http://www.onsemi.com/orderlit for additional information, please contact your local sales representative ? 2010 scillc. all rights reserved. 11 doc. no. md-3005 rev. v characteristics subject to change without notice revision history date rev. description 22-oct-03 l updated ordering information 22-dec-03 m updated features replaced power-up reset timeout vs. temperature graph with updated one replaced v cc transient response graph with updated one 22-mar-04 n general data sheet updates 25-mar-04 o updated electrical characteristics (reset active timeout period max) 25-mar-04 p corrected pin configure diagram 28-sept-04 q minor changes 28-dec-05 r updated features updated ordering information updated top marking 18-apr-08 s add ?md-? to document number add block diagrams updated package outline drawing update example of ordering information 5-nov-08 t change logo and fine print to on semiconductor 19-may-10 u update electrical operating characteristics 20-july-10 v update figure 2

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