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? semiconductor components industries, llc, 2011 april, 2011 ? rev. 6 1 publication order number: cat705/d cat705, cat706, cat813 p supervisory circuits description the cat705, cat706, and cat813 provide reset and monitoring functions for the electronic systems. each device monitors the system voltage and maintains a reset output until that voltage reaches the device?s specified trip value and then maintains the reset output active condition until the device?s internal timer allows the system power supply to stabilize. the devices have a watchdog input which can be used to monitor a system signal and causes wdo to go low if the signal fails to change state prior to a timeout condition. the supervisory circuits provide a mr input which initiates a reset if pulled low. the cat705 and cat706 provide an active low reset output. the cat813 provides an active high reset output. there is a secondary supply monitor (pfi) included for power ? fail warning. features ? reset guaranteed valid for 1.0 v v cc ? 6 a supply current ? 200 ms reset pulse width ? watchdog timer function 1.6 s timeout ? accurate brownout detection reset in 3.0, 3.6, and 5.0 volt systems ? secondary low supply monitoring on pfi input ? pin and function compatible with the max705/max706/max813l products ? operating range from ? 40 c to +85 c ? soic 8 ? lead and msop 8 ? lead packages ? these devices are pb ? free, halogen free/bfr free and are rohs compliant typical applications ? microprocessor and microcontroller based systems ? instrument and control systems ? portable equipment http://onsemi.com pin configurations and marking diagrams gnd pfo wdi v cc mr wdo reset * 1 see detailed ordering and shipping information in the package dimensions section on page 12 of this data sheet. ordering information soic ? 8 v suffix case 751bd msop ? 8 z suffix case 846ad pfi soic ? 8 (v) (top view) msop ? 8 (z) (top view) pfi gnd v cc mr pfo reset * wdo wdi 1 (* reset for cat813) v = threshold voltages = (blank = 4.65 v, t = 3.08 v, = s = 2.93 v, r = 2.63 v) l = assembly location code 4 = lead finish nipdau a = product revision: fixed as ?a? catxxxv = specific device code = (cat705v = cat705 soic) = (cat706v = cat706 soic) = (cat813v = cat813 soic) i = temperature range (i = industrial) y = production year (last digit) m = production month (1 ? 9, o, n, d) alnd = last four assembly lot number digits vl4a cat705vi ymalnd abrx = specific device code = (abrt = cat705 msop) = (abrt = cat706 msop) = (abrs = cat813 msop) y = production year (last digit) m = production month (1 ? 9, o, n, d) z = product revision abrx ymz
cat705, cat706, cat813 http://onsemi.com 2 reset controller timer 52kw 1.25 v timer watchdog transition detection pfi wdi figure 1. functional block diagram wdo pfo reset (reset for cat813) v cc mr v cc + ? v rst + ? watchdog r mr = 60 k device reset reset mr wdi wdo pfi cat705 @ 4.65 v x x x @ 1.25 v cat706 x x x x @ 1.25 v cat813 @ 4.65 v x x x @ 1.25 v
cat705, cat706, cat813 http://onsemi.com 3 table 1. pin function description pin name function mr manual reset input v cc power supply gnd ground pfi power fail voltage monitor input pfo power fail output wdi watchdog timer input reset cmos push ? pull active low reset output (cat705 & cat706) reset cmos push ? pull active high reset output (cat813) wdo watchdog timer output table 2. absolute maximum ratings parameters ratings units supply voltage 6.5 v all other pins ? 0.3 to (v cc + 0.3) v output current reset, reset , wdo 20 ma continuous power dissipations (t a = +70 c) soic 8 ? lead (derate 5.9 mw/ c above +70 c) msop 8 ? lead (derate 4.1 mw/ c above +70 c) 471 330 mw storage temperature ? 65 to 150 c lead soldering (10 seconds max) +300 c esd rating: human body model 2000 v esd rating: machine model 200 v 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 3. recommended operating conditions parameter rating unit v cc (t a = ? 40 c to +85 c) 1.0 to 5.5 v all other pins ? 0.1 to (v cc + 0.1) v ambient temperature ? 40 to +85 c
cat705, cat706, cat813 http://onsemi.com 4 table 4. electrical operating characteristics (typical values at t a = 25 c and v cc = 5 v for cat705, cat706 and cat813 versions. v cc = 3.3 v for the cat706 t/s versions; v cc = 3.0 v for the cat706 r version.) (note 1) parameter symbol test conditions min typ max units supply current i cc cat705, cat706, cat813 6 17 a cat706 (r/s/t versions) 4 12 a reset threshold v rst cat705 & cat813 at ? 40 c t a +85 c 4.50 4.65 4.75 v cat706 at ? 40 c t a +85 c 4.25 4.40 4.50 v cat706t at ? 40 c t a +85 c 3.00 3.08 3.15 v cat706s at ? 40 c t a +85 c 2.85 2.93 3.00 v cat706r at ? 40 c t a +85 c 2.55 2.63 2.70 v reset threshold tempco (note 1) 40 ppm/ c reset threshold hysteresis (note 1) cat705 & cat813 10 mv cat706 5 mv v cc to reset delay (note 2) t rd v cc = v th to (v th ? 100 mv) 20 s reset active timeout period t rp 140 200 400 ms reset output high voltage v oh cat705 & cat706, 4.5 v < v cc < 5.5 v, i source = ? 800 a v cc ? 1.5 v v cat705 & cat706, v rst (max) < v cc < 3.6 v, i source = ? 500 a 0.8 x v cc reset output low voltage v ol cat705 & cat706, 4.5 v < v cc < 5.5 v, i sink = 3.2 ma 0.4 v cat705 & cat706, v rst (max) < v cc < 3.6 v, i sink = 1.2 ma 0.3 cat705 &cat706, v cc = 1 v, i sink = 100 a 0.3 reset output high voltage v oh cat813, v cc = v rst max , i source = ? 120 a v cc ? 1.5 v v cat813, v cc = v rst max , i source = ? 30 a 0.8 x v cc reset output low voltage v ol cat813, v cc = v rst min , i sink = 3.2 ma 0.4 v cat813, v cc = 1.2 v, i sink = 100 a 0.3 watchdog input watchdog timeout period t wd 1.00 1.6 2.25 s wdi pulse width t wp v il = 0.4 v, v ih = 0.8 x v cc 50 ns wdi input voltage (note 3) v il 0.3 x v cc v v ih 0.7 x v cc wdi input current (note 3) wdi = v cc , time average 50 150 a wdi = 0 v, time average ? 150 ? 50 1. limits are guaranteed by design and not production tested. 2. the reset short ? circuit current is the maximum pull ? up current when reset is driven low by a bidirectional output. 3. wdi is internally serviced within the watchdog period if wdi is left open. 4. reset for cat705 & cat706 & reset for cat813. 5. not 100% tested but guaranteed by design.
cat705, cat706, cat813 http://onsemi.com 5 table 4. electrical operating characteristics (typical values at t a = 25 c and v cc = 5 v for cat705, cat706 and cat813 versions. v cc = 3.3 v for the cat706 t/s versions; v cc = 3.0 v for the cat706 r version.) (note 1) parameter units max typ min test conditions symbol watchdog input wdo output voltage v w_oh v rst (max) < v cc < 3.6 v; i source = ? 500 a 0.8 x v cc v 4.5 v < v cc < 5.5 v, i source = ? 800 a v cc ? 1.5 v cc ? 0.25 v w_ol v rst (max) < v cc < 3.6 v, i sink = +500 a 0.3 4.5 v < v cc < 5.5 v, i sink = 1.2 ma 0.1 0.4 wdo to wdi setup time (note 5) t wdsu 250 ns manual reset input mr input voltage v il 0.3 x v cc v v ih 0.7 x v cc mr pull ? up current mr = 0 v 40 70 140 a mr pulse width t pb 1 s mr pull ? up resistance r mr 40 60 80 k mr low to reset delay (note 4) t pdly 5 s power ? fail input pfi input threshold v cc = 5 v 1.2 1.25 1.3 v pfi input current ? 25 0.01 25 na pfo output voltage v p_oh v rst(max) < v cc < 3.6 v, i source = ? 500 a 0.8 x v cc v 4.5 v < v cc < 5.5 v, i source = ? 800 a v cc ? 1.5 0.4 v p_ol v rst (max) < v cc < 3.6 v, i sink = +1.2 ma 0.3 4.5 v < v cc < 5.5 v, i sink = 3.2 ma 0.4 1. limits are guaranteed by design and not production tested. 2. the reset short ? circuit current is the maximum pull ? up current when reset is driven low by a bidirectional output. 3. wdi is internally serviced within the watchdog period if wdi is left open. 4. reset for cat705 & cat706 & reset for cat813. 5. not 100% tested but guaranteed by design.
cat705, cat706, cat813 http://onsemi.com 6 typical performance characteristics figure 2. v cc supply current vs. temperature figure 3. normalized reset threshold voltage vs. temperature temperature ( c) temperature ( c) 100 80 60 40 20 0 ? 20 ? 40 1 2 3 4 5 6 8 9 100 80 60 40 20 0 ? 20 ? 40 0.94 0.96 0.98 1.00 1.02 1.04 1.06 supply current ( a) normalized reset threshold (v) 120 7 functional description processor reset the cat705, cat706 & cat813 detect supply voltage (v cc ) conditions that are below the specified voltage trip value (v rst ) and provide a reset output to maintain correct system operation. on power ? up, reset (or reset for the cat813) are kept active for a minimum delay t rp of 140 ms after the supply voltage (v cc ) rises above v rst to allow the power supply and processor to stabilize. when v cc drops below the voltage trip value (v rst ), the reset output signals reset (or reset) are pulled active. reset (or reset) is specifically designed to provide the reset input signals for processors. this provides reliable and consistent operation as power is turned on, off or during brownout conditions by maintaining the processor operation in known conditions. manual reset the cat705, cat706 & cat813 each have a manual reset (mr ) input to allow for alternative control of the reset outputs. the mr input is designed for direct connection to a pushbutton (see figure 4). the mr input is internally pulled up by 60 k resistor and must be pulled low to cause the reset output to go active. internally, this input is debounced and timed such that reset (or reset) signals of at least 140 ms minimum will be generated. the min 140 ms t rp delay commences as the manual reset input is released from the low level. (see figure 5). wdi gnd pfi cat705 cat706 cat813 figure 4. pushbutton reset v cc mr pfo wdo reset /reset reset figure 5. timing diagram ? pushbutton reset reset mr v il t pb t pdly v ih t rp v oh v ol
cat705, cat706, cat813 http://onsemi.com 7 watchdog timer the cat705, cat706, & cat813 provide a watchdog input (wdi). the watchdog timer function controls the watchdog output (wdo ) signal and forces the wdo to be low (active) when the wdi input does not have a transition from low ? to ? high or high ? to ? low within 1.6 s typical. if a transition occurs on the wdi input pin prior to the watchdog time ? out, the watchdog timer is restarted. the timing diagram is shown in figure 6. the watchdog timer starts as soon as reset condition becomes inactive. when the v cc supply drops below the reset threshold, the wdo output becomes active and goes low independently of the watchdog timing stage. figure 7 below shows a typical implementation of a watchdog function. any processor signal that repeats dependant on the normal operation of the processor or directed by the software operating on the processor can be used to strobe the watchdog input. the most reliable is a dedicated i/o output transitioned by a specific software instruction. the watchdog can be disabled by floating (or tri ? stating) the wdi input (see figure 8). if the watchdog is disabled the wdi pin will be pulled low for the first 7/8 th ?s of the watchdog period (t wd ) and pulled high for the last 1/8 th of the watchdog period. this pulling low of the wdi input and then high is used to detect an open or tri ? state condition and will continue to repeat until the wdi input is driven high or low. for most ef ficient operation of devices with the watchdog function the wdi input should be held low the majority of the time and only strobed high as required to reset the watchdog timer. (reset) (() are for cat813 only) wdi +5 v 0 v +5 v 0 v +5 v 0 v +5 v 0 v figure 6. watchdog timing diagram t rs t wd t wd t wd t wdsu t wp reset wdo reset externally triggered by mr pic decoder address wdi gnd pfi cat705 cat706 cat813 figure 7. watchdog timer circuit mclr c v cc pfo mr wdo reset /reset
cat705, cat706, cat813 http://onsemi.com 8 output tristate 150 k wdi gnd pfi cat705 cat706 cat813 figure 8. watchdog disable circuit reset (cat813) figure 9. timing diagram ? power down reset (cat813) figure 10. timing diagram ? power up c 110 k v cc v cc mr pfo wdo reset /reset v cc v rst v rst (max) v rst (min) t rd reset (cat705 & cat706) reset slews with v cc v oh v ol v cc v oh v ol t rp v rst v rst (max) v rst (min) reset (cat705 & cat706)
cat705, cat706, cat813 http://onsemi.com 9 application notes p?s with bidirectional reset pins the reset output can be pulled low by processors like the 68hc11 allowing for a system reset issued by the processor. the maximum pullup current that can be sourced by the cat705 & cat706 1.5 ma (and by the cat706 t/r/s is 800 a) allowing the processor to pull the output low even when the cat70x is pulling it high. power transients generally short duration negative ? going transients of less than 2 s on the power supply at v rst minimum will not cause a reset condition. however the lower the voltage of the transient the shorter the required time to cause a reset output. these issues can usually be remedied by the proper location of bypass capacitance on the circuit board. output valid conditions the reset output uses a push ? pull output which can maintain a valid output down to a v cc of 1.0 volts . to sink current below 0.8 v a resistor can be connected from reset to ground (see figure 11.) this arrangement will maintain a valid value on the reset output during both power up and down but will draw current when the reset output is in the high state. a resistor value of about 100 k should be adequate in most situations to maintain a low condition valid output down to v cc equal to 1.0 v. c wdi gnd pfi cat705 cat706 cat813 100 k figure 11. reset valid for v cc < 1.0 v reset /reset reset /reset pfo wdo v cc mr c i/o line interrupt nmi vcc push switch 5 v wdi gnd pfi cat705 cat706 cat813 unregulated dc figure 12. typical operating circuit v cc mr pfo wdo reset /reset reset /reset
cat705, cat706, cat813 http://onsemi.com 10 package dimensions soic 8, 150 mils case 751bd ? 01 issue o e1 e a a1 h l c e b d pin # 1 identification top view side view end view notes: (1) all dimensions are in millimeters. angles in degrees. (2) complies with jedec ms-012. symbol min nom max a a1 b c d e e1 e h 0o 8o 0.10 0.33 0.19 0.25 4.80 5.80 3.80 1.27 bsc 1.75 0.25 0.51 0.25 0.50 5.00 6.20 4.00 l 0.40 1.27 1.35
cat705, cat706, cat813 http://onsemi.com 11 package dimensions msop 8, 3x3 case 846ad ? 01 issue o e1 e a2 a1 e b d c a top view side view end view l1 l2 l detail a detail a notes: (1) all dimensions are in millimeters. angles in degrees. (2) complies with jedec mo-187. symbol min nom max a a1 a2 b c d e e1 e l 0o 6o l2 0.05 0.75 0.22 0.13 0.40 2.90 4.80 2.90 0.65 bsc 0.25 bsc 1.10 0.15 0.95 0.38 0.23 0.80 3.10 5.00 3.10 0.60 3.00 4.90 3.00 l1 0.95 ref 0.10 0.85
cat705, cat706, cat813 http://onsemi.com 12 example of ordering information (notes 6 ? 9) prefix device # suffix company id cat 706 r product number 705 v ? gt3 reset threshold v: soic 8 ? lead z: msop 8 ? lead package blank: see table 6 t: 3.08 v s: 2.93 v r: 2.63 v g: nipdau t: tape & reel 3: 3,000 units / reel tape & reel (note 10) (optional) i temperature range i = industrial ( ? 40 c to +85 c) lead finish 706 813 voltage 6. all packages are rohs ? compliant (lead ? free, halogen ? free). 7. the standard lead finish is nipdau. 8. the device used in the above example is a cat706rvi ? gt3 (2.63 v, soic 8 ? lead, industrial temperature, nipdau, tape & reel, 3,000/reel). 9. contact factory for package availability. 10. for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and ree l packaging specifications brochure, brd8011/d. table 5. top marking information (for all thresholds) device # package top marking nipdau finish ( ? g) cat705 msop abrt cat706 msop abrt cat813 msop abrs cat705 soic cat705v cat706 soic cat706v cat813 soic cat813v table 6. ordering part number order part number threshold voltage cat705vi ? g 4.65 v cat705zi ? g cat706vi ? g 4.40 v cat706zi ? g cat706rvi ? g 2.63 v cat706rzi ? g cat706svi ? g 2.93 v cat706szi ? g cat706tvi ? g 3.08 v cat706tzi ? g cat813vi ? g 4.65 v cat813zi ? g 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. cat705/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 ? 5773 ? 3850 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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