? semiconductor components industries, llc, 2012 october, 2012 ? rev. 1 1 publication order number: cax803/d cax803, CAX809, cax810 3-pin microprocessor power supply supervisors description the cax803, CAX809, and cax810 are supervisory circuits that monitor power supplies in digital systems. the cax803, CAX809, and cax810 are direct replacements for the max803, max809 and max810 in applications operating over the industrial temperature range. 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 cax803 has an open ? drain reset output (active low). the cax803 requires a pull ? up resistor on the reset output. the CAX809 features a push ? pull reset output (active low) and the cax810 features a push ? pull reset output (active high). fast transients on the power supply are ignored and the output is guaranteed to be in the correct state at v cc levels as low as 1.0 v. the cax803, CAX809, and cax810 are available in the compact 3 ? pin sot ? 23 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 ? offered in three output configurations: ? cax803: open ? drain active low reset ? CAX809: push ? pull active low reset ? cax810: push ? pull active high reset ? direct replacements for the max803, max809 and max810 in applications operating over the industrial temperature range ? reset valid down to v cc = 1.0 v ? 10 a power supply current ? power supply transient immunity ? industrial t emperature range: ? 40 c to +85 c ? available in sot ? 23 package ? these devices are pb ? free and are rohs compliant applications ? computers, servers, laptops, cable modems ? wireless communications ? embedded control systems ? white goods, power meters ? intelligent instruments ? pdas and handheld equipment http://onsemi.com pin configuration v cc reset (reset) gnd 1 see detailed ordering and shipping information in the package dimensions section on page 9 of this data sheet. ordering information (top view) sot ? 23 tb suffix case 527ag 2 3 cax803 CAX809 (cax810) 3 ? lead sot23 xxxm xxx = specific device code m = month code = pb ? free package marking diagrams (*note: microdot may be in either location) sot ? 23
cax803, CAX809, cax810 http://onsemi.com 2 table 1. threshold suffix selector nominal threshold voltage threshold suffix designation 4.63 v l 4.55 v h 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 descriptions pin number name description cax803 CAX809 cax810 1 1 1 gnd ground 2 2 ? reset active low reset. reset is asserted if v cc falls below the reset threshold and remains 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 remains high for at least 140 ms after v cc rises above the reset threshold. 3 3 3 v cc power supply voltage that is monitored. table 3. absolute maximum ratings parameter rating 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 rise, v cc 100 v/ s continuous power dissipation derate 4 mw/ c above 70 c (sot23) 320 mw operating temperature range ? 40 to +85 c storage temperature range ? 65 to +105 c lead soldering temperature (10 sec) 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.
cax803, CAX809, cax810 http://onsemi.com 3 cax803 gnd + ? digital delay tolerance bias voltage reference cax810 + ? digital delay tolerance bias voltage reference gnd CAX809 + ? digital delay tolerance bias voltage reference gnd figure 1. block diagrams v cc v cc v cc reset reset reset v cc v cc v cc v cc v cc v cc
cax803, CAX809, cax810 http://onsemi.com 4 table 4. electrical characteristics (v cc = full range, t a = ? 40 c to +85 c, unless otherwise specified. typical values at t a = +25 c and v cc = 5 v for the l/h/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/v versions.) symbol parameter conditions min typ (note 1) 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 i cc supply current t a = ? 40 c to +85 c v cc < 5.5 v, j/l/m/h 15 25 a v cc < 3.6 v, r/s/t/z/v 10 15 v th reset threshold voltage l threshold t a = +25 c 4.56 4.63 4.70 v t a = ? 40 c to +85 c 4.50 4.75 h threshold t a = +25 c 4.48 4.55 4.62 t a = ? 40 c to +85 c 4.43 4.67 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 t d v cc to reset delay (note 2) v cc = v th to (v th ? 100 mv) 20 s t r reset active timeout period t a = ? 40 c to +85 c 140 240 460 ms v ol reset output voltage low (open ? drain active low, cax803 and push ? pull, active low, CAX809) v cc = v th min, i sink = 1.2 ma cax803r/s/t/z, CAX809r/s/t/z/v 0.3 v v cc = v th min, i sink = 3.2 ma cax803j/l/m, CAX809j/l/m/h 0.4 v cc > 1.0 v, i sink = 50 a 0.3 v oh reset output voltage high (push ? pull, active low, CAX809) v cc = v th max, i source = 500 a CAX809r/s/t/z/v 0.8 v cc v v cc = v th max, i source = 800 a CAX809j/l/m/h v cc ? 1.5 v ol reset output voltage low (push ? pull, active high, cax810) v cc > v th max, i sink = 1.2 ma cax810r/s/t/z 0.3 v v cc > v th max, i sink = 3.2 ma cax810j/l/m 0.4 v oh reset output voltage high (push ? pull, active high, cax810) 1.8 v < v cc v th min, i source = 150 a 0.8 v cc v 1. production testing done at t a = +25 c; limits over temperature guaranteed by design only. 2. reset output for the CAX809; reset output for the cax810.
cax803, CAX809, cax810 http://onsemi.com 5 typical operating characteristics (v cc = full range, t a = ? 40 c to +85 c, unless otherwise specified. 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, cax8xxr/s/t/z) temperature ( c) temperature ( c) 150 100 50 0 ? 50 160 180 200 220 240 260 100 50 0 ? 50 0 0.7 1.0 1.3 1.6 1.9 figure 4. power ? down reset delay vs. temperature (cax8xxr/s/t/z) figure 5. normalized reset threshold vs. temperature temperature ( c) temperature ( c) 150 100 50 0 ? 50 0 4 10 14 120 100 80 60 40 20 0 0.9988 0.9990 0.9992 0.9998 1.0000 1.0002 power ? up reset timeout (ms) normalized supply current ( a) power ? down reset delay ( s) normalized threshold 150 0.9994 0.4 2 6 8 12 0.9996 v cc = 2.5 v v cc = 5 v
cax803, CAX809, cax810 http://onsemi.com 6 detailed descriptions reset timing the reset signal is asserted low for the cax803/CAX809 an d high for the cax810 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. 0 v cax803, CAX809 5 v 0 v 5 v reset (140 ms minimum) reset timeout period cax810 0 v 5 v figure 6. reset timing diagram t r t d v th v cc reset /out v cc transient response the cax803/CAX809/cax810 protect ps against brownout failure. short duration transients of 4 sec 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 ( s) CAX809m CAX809z t amb = 25 c
cax803, CAX809, cax810 http://onsemi.com 7 valid reset with v cc under 1.0 v to ensure that the CAX809 reset pin is in a known state when v cc is under 1.0 v, a >10 k pull ? down resistor between reset pin and gnd is recommended. for the cax810, 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 CAX809 gnd power 10 k supply cax810 gnd power supply reset v cc reset 10 k v cc bi ? directional reset pin interfacing the CAX809/810 can interface with p/ c bi ? directional reset pins by connecting a 4.7 k resistor in series with the CAX809/810 reset output and the p/ c bi ? directional reset pin. figure 10. bi ? directional reset pin interfacing CAX809 gnd power supply buf buffered reset gnd bi ? directional i/o pin p (for example: 68hc11) v cc v cc 4.7 k reset reset input cax803 open ? drain reset application the cax803 features an open ? drain reset output and therefore needs a pull ? up resistor on the output for proper operation, as shown on figure 11. an advantage of the open ? drain output includes the ability to ?wire and? several outputs together to form an inexpensive logic circuit. it is also possible to have the pull ? up resistor connected to a different supply which can be higher than the cax803 v cc pin. the value of the pull ? up resistor is not critical in most applications, typical values being between 5 k and 10 k . figure 11. typical cax803 open ? drain circuit configuration cax803 gnd power supply gnd p v cc v cc 5 k reset reset input
cax803, CAX809, cax810 http://onsemi.com 8 package dimensions sot ? 23, 3 lead case 527ag ? 01 issue o e1 e a1 e e1 b d 3 12 c a top view side view end view l1 l notes: (1) all dimensions are in millimeters. angles in degrees. (2) complies with jedec to-236. symbol min nom max a a1 b c d e e1 e e1 l1 0o 8o l 0.013 0.37 0.085 2.80 2.10 1.20 1.90 bsc 0.40 ref 1.12 0.10 0.50 0.18 3.04 2.64 1.40 0.54 ref 0.95 bsc 0.89
cax803, CAX809, cax810 http://onsemi.com 9 table 5. ordering part number order number voltage top mark (note 3) output reset package quantity per reel (note 4) cax803ltbi ? t3 4.63 v vkl open drain low sot ? 23 ? 3 3,000 cax803mtbi ? t3 4.38 v cax803jtbi ? t3 4.00 v cax803ttbi ? t3 3.08 v cax803stbi ? t3 2.93 v cax803rtbi ? t3 2.63 v cax803ztbi ? t3 2.32 v CAX809ltbi ? t3 4.63 v vld cmos / push ? pull low sot ? 23 ? 3 3,000 CAX809htbi ? t3 4.55 v CAX809mtbi ? t3 4.38 v CAX809jtbi ? t3 4.00 v CAX809ttbi ? t3 3.08 v CAX809stbi ? t3 2.93 v CAX809rtbi ? t3 2.63 v CAX809ztbi ? t3 2.32 v cax810ltbi ? t3 4.63 v vht cmos / push ? pull high sot ? 23 ? 3 3,000 cax810mtbi ? t3 4.38 v cax810jtbi ? t3 4.00 v cax810ttbi ? t3 3.08 v cax810stbi ? t3 2.93 v cax810rtbi ? t3 2.63 v cax810ztbi ? t3 2.32 v 3. threshold and full part numbers will be provided on box and reel labels as well as all shipping documents. 4. 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. 5. 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 co mponents industries, llc (scillc). scillc owns the rights to a numb er of patents, trademarks, copyrights, trade secrets, and other intellectual property. a list ing of scillc?s product/patent coverage may be accessed at ww w.onsemi.com/site/pdf/patent ? marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and s pecifically disclaims any and all liability, including without 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 applications and actual performance may vary over time. all operating parame ters, 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 right s of others. scillc products are not designed, intended, or a uthorized 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 whic h the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or us e scillc products for any such unintended or unauthorized appli cation, 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 or indirectly, any claim of personal injury or death associated with such unin tended or unauthorized use, even if such claim alleges that scil lc 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 copyrig ht laws and is not for resale in any manner. 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 cax803/d 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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