? semiconductor components industries, llc, 2012 october, 2012 ? rev. 2 1 publication order number: cat811/d cat811, cat812 4-pin microprocessor power supply supervisors with manual reset description the cat811 and cat812 are microprocessor supervisory 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 140 ms after the power supply level has risen above that level. the underlying floating gate technology, analog eeprom used by on semiconductor, makes it possible to offer any custom reset threshold value. seven industry standard threshold levels are offered to support +5.0 v, +3.3 v, +3.0 v and +2.5 v 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 ( ? 40 c to 85 c) and are available in a compact 4 ? pin sot ? 143 package. 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 = 1.0 v ? 6 a power supply current ? power supply transient immunity ? available in sot ? 143 packages with sn or nipdau green lead finishes ? industrial temperature range: ? 40 c to +85 c ? these devices are pb ? free, halogen free/bfr free and are rohs compliant applications ? computers, servers, laptops and cable modems ? wireless communications ? embedded control systems ? white goods, power meters ? intelligent instruments ? pdas and handheld equipment http://onsemi.com pin configuration see detailed ordering and shipping information in the package dimensions sect ion on page 9 of this data sheet. ordering information sot ? 143 bi suffix case 527af (top view) reset gnd v cc mr 1 2 4 3 1 marking diagram xxx = specific device code m = month code = pb ? free package (*note: microdot may be in either location) xxxm
cat811, cat812 http://onsemi.com 2 table 1. threshold suffix selector description nominal threshold voltage threshold suffix designation 4.63 v l 4.38 v m 4.00 v j 3.08 v t 2.93 v s 2.63 v r 2.32 v z table 2. pin description pin number pin 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 re- mains low for at least 140 ms 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 re- mains high for at least 140 ms 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 140 ms after mr returns high. the active low input has an internal 20 k pull ? up resistor. the input should be left open if not used. 4 4 v cc power supply voltage that is monitored. figure 1. block diagrams cat812 reset + ? reset & digital delay tolerance bias voltage reference gnd cat811 + ? reset & digital delay tolerance bias voltage reference gnd v cc v cc v cc reset v cc v cc v cc mr mr
cat811, cat812 http://onsemi.com 3 table 3. absolute maximum ratings 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 derate 4 mw/ c above +70 c (sot ? 143) 320 mw storage temperature range ? 65 to +105 c operating ambient temperature range ? 40 to +85 c lead soldering temperature (10 seconds) +300 c stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. table 4. electrical operating characteristics (v cc = full range, t a = ? 40 c to +85 c unless otherwise noted. typical values at t a = +25 c and v cc = 5 v for the l/m/j versions, v cc = 3.3 v for the t/s versions, v cc = 3 v for the r version and v cc = 2.5 v for the z version.) parameter symbol conditions min typ max units v cc range t a = 0 c to +70 c 1.0 5.5 v t a = ? 40 c to +85 c 1.2 5.5 supply current i cc t a = ? 40 c to +85 c v cc < 5.5 v, j/l/m 8 20 a v cc < 3.6 v, r/s/t/z 6 15 reset threshold voltage v th l threshold t a = +25 c 4.56 4.63 4.70 v t a = ? 40 c to +85 c 4.50 4.75 m threshold t a = +25 c 4.31 4.38 4.45 t a = ? 40 c to +85 c 4.25 4.50 j threshold t a = +25 c 3.93 4.00 4.06 t a = ? 40 c to +85 c 3.89 4.10 t threshold t a = +25 c 3.04 3.08 3.11 t a = ? 40 c to +85 c 3.00 3.15 s threshold t a = +25 c 2.89 2.93 2.96 t a = ? 40 c to +85 c 2.85 3.00 r threshold t a = +25 c 2.59 2.63 2.66 t a = ? 40 c to +85 c 2.55 2.70 z threshold t a = +25 c 2.28 2.32 2.35 t a = ? 40 c to +85 c 2.25 2.38 reset threshold tempco 30 ppm/ c v cc to reset delay (note 3) v cc = v th to (v th ? 100 mv) 20 s reset active timeout period t a = ? 40 c to +85 c 140 240 400 ms 1. production testing done at t a = +25 c; limits over temperature guaranteed by design only. 2. glitches of 100 ns or less typically will not generate a reset pulse. 3. reset output for the cat811; reset output for the cat812.
cat811, cat812 http://onsemi.com 4 table 4. electrical operating characteristics (v cc = full range, t a = ? 40 c to +85 c unless otherwise noted. typical values at t a = +25 c and v cc = 5 v for the l/m/j versions, v cc = 3.3 v for the t/s versions, v cc = 3 v for the r version and v cc = 2.5 v for the z version.) parameter units max typ min conditions symbol reset output voltage low (push ? pull, active low, cat811) v ol v cc = v th min , i sink = 1.2 ma cat811r/s/t/z 0.3 v v cc = v th min , i sink = 3.2 ma cat811j/l/m 0.4 v cc > 1.0 v, i sink = 50 a 0.3 reset output voltage high (push ? pull, active low, cat811) v oh v cc = v th max , i source = 500 a cat811r/s/t/z 0.8v cc v v cc = v th max , i source = 800 a cat811j/l/m v cc ? 1.5 v reset output voltage low (push ? pull, active high, cat812) v ol v cc > v th max , i sink = 1.2 ma cat812r/s/t/z 0.3 v v cc > v th max , i sink = 3.2 ma 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 = 150 a 0.8v cc v mr minimum pulse width t mr 10 s mr glitch immunity (note 2) 100 ns mr to reset propagation delay t md (note 3) 0.5 s mr input threshold v ih v cc > v th (max) , cat811/812l/m/j 2.3v v v il 0.8 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 1. production testing done at t a = +25 c; limits over temperature guaranteed by design only. 2. glitches of 100 ns or less typically will not generate a reset pulse. 3. reset output for the cat811; reset output for the cat812.
cat811, cat812 http://onsemi.com 5 typical operating characteristics (v cc = full range, t a = ? 40 c to +85 c unless otherwise noted. typical values at t a = +25 c and v cc = 5 v for the l/m/j versions, v cc = 3.3 v for the t/s versions, v cc = 3 v for the r version and v cc = 2.5 v for the z version.) figure 2. power ? up reset timeout vs. temperature figure 3. supply current vs. temperature (no load, cat8xxr/s/t/z) temperature ( c) temperature ( c) 150 100 50 0 ? 50 160 180 200 220 240 260 150 100 50 0 ? 50 0 2 4 6 8 10 12 figure 4. power ? down reset delay vs. temperature (cat8xxr/s/t/z) figure 5. normalized reset threshold vs. temperature temperature ( c) temperature ( c) 150 100 50 0 ? 50 0 2 4 6 8 10 12 14 120 100 80 60 40 20 0 0.9988 0.9990 0.9992 0.9994 0.9996 0.9998 1.0000 1.0002 power ? up reset timeout (ms) supply current ( a) power ? down reset delay (s) normalized threshold v cc = 5 v v cc = 2.5 v v cc = 5.5 v v cc = 3.6 v
cat811, cat812 http://onsemi.com 6 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 140 ms after the power supply voltage has risen above the threshold. 5 v 0 v 5 v 0 v threshold voltage 140 ms minimum figure 6. reset timing diagram reset 0 v reset cat811 cat812 reset timeout period v cc v cc v cc transient response the cat811/812 protect ps against brownout failure. short duration transients of 4 s or less and 100 mv amplitude typically do not cause a false reset. figure 7 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 0.5 v above the threshold and drops below it by the amplitude of the overdrive voltage (v th ? v cc ). figure 7. maximum transient duration without causing a reset pulse vs. reset comparator overdrive reset overdrive v th ? v cc (mv) 1000 100 10 1 0 5 10 15 20 25 30 transient duration (ms) cat8xxz t amb = 25 c cat8xxm valid reset with v cc under 1.0 v to ensure that the cat811 reset pin is in a known state when v cc is under 1.0 v, a 100 k 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 8. reset valid with v cc under 1.0 v figure 9. reset valid with v cc under 1.1 v gnd cat812 reset power supply gnd 100 k cat811 power supply mr v cc 100 k v cc reset mr
cat811, cat812 http://onsemi.com 7 bi ? directional reset pin interfacing the cat811/812 can interface with p/ c bi ? directional reset pins by connecting a 4.7 k resistor in series with the cat811/812 reset output and the p/ c bi ? directional reset pin. figure 10. bi ? directional reset pin interfacing gnd 4.7 k cat811 cat811 gnd buf input power supply (for example: 68hc11) buffered bi ? directional i/o pin reset v cc mr reset reset p table 5. 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 http://onsemi.com 8 package dimensions sot ? 143, 4 lead case 527af ? 01 issue a e1 e a1 e e1 b b2 d c a a2 top view side view end view l1 l2 l notes: (1) all dimensions are in millimeters. angles in degrees. (2) complies with jedec to-253. symbol min nom max 0 8 a a1 a2 b b2 c d e e l l1 0.05 0.75 0.30 0.76 0.40 0.08 2.80 2.10 1.92 bsc 0.54 ref 1.22 0.15 1.07 0.50 0.89 0.60 0.20 3.04 2.64 0.50 0.90 2.90 e1 0.20 bsc e1 1.20 1.40 1.30 l2 0.25 0.80 12 43
cat811, cat812 http://onsemi.com 9 ordering information order number voltage top mark (note 4) output reset package quantity per reel (note 5) nipdau matte ? tin nipdau matte ? tin CAT811LTBI ? gt3 CAT811LTBI ? t3 4.63 v vea ves manual reset low sot ? 143 ? 4 3,000 cat811mtbi ? gt3 cat811mtbi ? t3 4.38 v vea ves cat811jtbi ? gt3 cat811jtbi ? t3 4.00 v vea ves cat811ttbi ? gt3 cat811ttbi ? t3 3.08 v vea ves cat811stbi ? gt3 cat811stbi ? t3 2.93 v vea ves cat811rtbi ? gt3 cat811rtbi ? t3 2.63 v vea ves cat811ztbi ? gt3 cat811ztbi ? t3 2.32 v vea ves cat812ltbi ? gt3 cat812ltbi ? t3 4.63 v vta vts manual reset high sot ? 143 ? 4 3,000 cat812mtbi ? gt3 cat812mtbi ? t3 4.38 v vta vts cat812jtbi ? gt3 cat812jtbi ? t3 4.00 v vta vts cat812ttbi ? gt3 cat812ttbi ? t3 3.08 v vta vts cat812stbi ? gt3 cat812stbi ? t3 2.93 v vta vts cat812rtbi ? gt3 cat812rtbi ? t3 2.63 v vta vts cat812ztbi ? gt3 cat812ztbi ? t3 2.32 v vta vts 4. threshold and full part numbers will be provided on box and reel labels as well as all shipping documents. 5. for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d. 6. for detailed information and a breakdown of device nomenclature and numbering systems, please see the on semiconductor device nomenclature document, tnd310/d, available at www.onsemi.com on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, 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. scillc 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 of ficers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or 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 manufacture 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. cat811/d publication ordering information 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 ? 5817 ? 1050 literature fulfillment : literature distribution center for on semiconductor 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 on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative
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