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apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 1 of 12 www.diodes.com may 2011 ? diodes incorporated description the apx823/apx824/apx825a family of supervisors provides circuit initialization and timing supervision, primarily for dsp and processor-based systems. during power-on, reset is asserted when supply voltage v cc becomes higher than 1.1v. thereafter, the supply voltage supervisor monitors v cc and keeps reset active as long as v cc remains below the threshold voltage v th - . an internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. the delay time, t d starts after v cc has risen above the threshold voltage v th- . when the supply voltage drops below the threshold voltage v th - , the output becomes active (low) again. no external components are required. all the devices of this family have a fixed-sense threshold voltage v th - set by an internal voltage divider. the apx823/apx825a devices incorporate a manual reset input, mr . a low level at mr causes reset to become active. the apx824/apx825a devices include a high-level output reset. apx823/apx824/apx825a have a watchdog timer that is periodically trig gered by a positive or negative transition at wdi. when the supervising system fails to retrigger the watchdog circuit within the time-out interval, ttout, reset becomes active for the time period td. this event also reinitializes the watchdog timer. leaving wdi unconnected disables the watchdog. in applications where the input to the wdi pin may be active (transitioning high and low) when the apx823/apx824/apx8 25a asserting reset the apx823/apx824/apx825a does not return to a non-reset state when the input voltage is above vt. the product spectrum is designed for supply voltage of 2.5v, 3v, 3.3v and 5v. the circuits are available in a sot25 and sot26 packages. the apx823/apx824/apx825a devices are characterized for operation over a temper ature range of -40 o c to 105 o c. features ? power-on reset generator with fixed delay time of 200ms typ ? manual reset input (apx823/apx825a) ? reset output available in active-low (apx823/apx824/apx825a), active-high (apx824/apx825a) ? supply voltage supervision range 2.5v, 3v, 3.3v, 5v ? watchdog timer ? supply current of 30 a (typ.) ? temperature range: -40c to 85c ? sot25 and sot26: available in ?green? molding compound (no br, sb) ? lead free finish/rohs compliant (note 1) pin assignments ? sot25 (top view) 1 2 v cc apx823 2 5 3 4 reset gnd wdi mr ? (top view) 1 2 v cc apx824 2 5 reset gnd so t2 5 3 4 reset wdi ? sot26 (top view) 1 2 v cc apx825a 2 6 3 4 reset reset gnd mr 5 wdi applications ? applications using dsps, microcontrollers, or microprocessors ? industrial equipment ? programmable controls ? automotive systems ? portable/battery-powered equipment ? intelligent instruments ? wireless communications systems ? notebook/desktop computers note: 1. eu directive 2002/95/ec (rohs). all applicable rohs exemptions applied, see eu directive 2002/95/ec annex notes .
apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 2 of 12 www.diodes.com may 2011 ? diodes incorporated typical application circuit v cc reset mr wdi gnd v cc reset i/o gnd v cc c in 100nf apx8xx microprocessor pin descriptions functional block diagram pin name description gnd ground reset (reset) reset output pin v cc operating voltage input wdi watchdog input mr manual reset
apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 3 of 12 www.diodes.com may 2011 ? diodes incorporated absolute maximum ratings (over operating ambient temperature range, unless otherwise noted)* symbol parameter rating unit esd hbm human body model esd protection 5 kv esd mm machine model esd protection 200 v v cc supply voltage 6.0 v v reset reset, reset , mr , wdi -0.3 to (v cc +0.3) v i cc input current v cc 20 ma i o maximum high output current 20 ma p d continuous total power dissipation derating factor above t a = 25 o c sot25 6.2 mw/c sot26 5.8 t a = 25 o c power rating sot25 500 mw sot26 470 t a = 70 o c power rating sot25 220 mw sot26 210 t a = 85 o c power rating sot25 125 mw sot26 120 t op operating junction temperat ure range -40 to 105 c t st storage temperature range -65 to 150 c * stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the de vice. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated under ?recommended operating conditions? is n ot implied. exposure to absolute- maximum-rated conditions for extended periods may affect device reliability. recommended operating conditions symbol parameter min max unit v cc supply voltage 1.1 5.5 v v in input voltage 0 (v cc +0.3) v v ih high-level input voltage at mr and wdi 0.7 v cc - v v il low-level voltage - 0.3 v cc v t/ v input transition rise and fall rate at mr or wdi - 100 ns/v t a operating ambient tem perature range -40 85 o c t r v cc rising time (v cc = 0~vt) - 100 v/ us
apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 4 of 12 www.diodes.com may 2011 ? diodes incorporated electrical characteristics (over recommended operating ambient temperature range, unless otherwise noted) symbol parameter test conditions min typ. max unit v oh high-level output voltage reset apx823/apx824/apx825a - 29/26/23 v cc = v th - +0.2v i oh =-20 a 0.8 v cc - - v apx823/apx824/apx825a - 40/31 v cc = v th- +0.2v i oh =-30 a apx823/apx824/apx825a ?46/44 v cc = v th - +0.2v i oh =-120 a v cc -1.5v - - v reset apx824/apx825a -29/26/23 v cc > 1.8v, i oh = -100 a 0.8 v cc - - v apx824/apx825a - 46/44/40/31 v cc > 1.8v, i oh = -150 a v ol low-level output voltage reset apx824/apx825a -29/26/23 v cc = v th - +0.2v i ol =1ma - - 0.4 v apx824/apx825a -40/31 v cc = v th - +0.2v i ol =1.2ma apx824/apx825a -46/44 v cc = v th - +0.2v i ol =3ma reset apx823/apx824/apx825a - 29/26/23 v cc = v th - -0.2v i ol =1ma - - 0.4 v apx823/apx824/apx825a - 40/31 v cc = v th- -0.2v i ol =1.2ma apx823/apx824/apx825a - 46/44 v cc = v th - -0.2v i ol =3ma v reset power-up reset voltage (see note 2) v cc > 1.1v, i ol =20 a - - 0.4 v v th- negative-going input threshold voltage (see note 3) apx823/apx824/apx825a -23 t a = 0 o c -85 o c 2.21 2.25 2.30 v apx823/apx824/apx825a -26 2.59 2.63 2.69 apx823/apx824/apx825a -29 2.88 2.93 3.00 apx823/apx824/apx825a -31 3.02 3.08 3.15 apx823/apx824/apx825a -40 3.93 4.00 4.08 apx823/apx824/apx825a -44 4.31 4.38 4.47 apx823/apx824/apx825a -46 4.56 4.63 4.72 apx823/apx824/apx825a -23 t a = -40 o c -85 o c 2.20 2.25 2.30 v apx823/apx824/apx825a -26 2.57 2.63 2.69 apx823/apx824/apx825a -29 2.86 2.93 3.00 apx823/apx824/apx825a -31 3.00 3.08 3.15 apx823/apx824/apx825a -40 3.92 4.00 4.08 apx823/apx824/apx825a -44 4.29 4.38 4.47 apx823/apx824/apx825a -46 4.54 4.63 4.72 note: 2. the lowest supply voltage at which reset becomes active. t r , v cc > 15 s/v. 3. to ensure best stability of the threshol d voltage, a bypass capacitor (ceramic, 0.1 f) should be placed near the supply terminals.
apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 5 of 12 www.diodes.com may 2011 ? diodes incorporated electrical characteristics (cont.) symbol parameter test conditions min typ. max unit v hys hysteresis at v cc input apx823/apx824/apx825a -23 - 50 - mv apx823/apx824/apx825a -26 apx823/apx824/apx825a -29 apx823/apx824/apx825a -31 apx823/apx824/apx825a -40 - 50 - apx823/apx824/apx825a -44 apx823/apx824/apx825a -46 t s set-up time v cc = v th to (v th ? 100mv) 20 s i ih(av) average high- level input current wdi wdi=v cc , time average (dc=88%) - 120 - a i il(av) average low- level input current wdi=0.3v, v cc =5.5v time average (dc=12%) - -15 - a i ih high-level input current wdi wdi=v cc - 120 160 a i il low-level input current wdi wdi=0.3v, v cc =5.5v - 120 160 a i cc supply current wdi and mr unconnected, outputs unconnected v cc = v th - +0.2v - 30 40 a internal pull-up resistor at mr - 60 - k ? tc v out temperature coefficient 50 - ppm/ o c c i input capacitance at mr , wdi v i = 0v to 5.5v - 5 - pf ja thermal resistance junction-to-ambient sot25 (note 4) 161 o c/w sot26 (note 4) 169 jc thermal resistance junction-to-case sot25 (note 4) 27 o c/w sot26 (note 4) 28 note: 4. test condition for sot25 and sot26: devices mounted on fr-4 substrate pc board, 2oz copper, with minimum recommended p ad layout.
apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 6 of 12 www.diodes.com may 2011 ? diodes incorporated timing requirements (@ r l = 1m ? , c l = 50pf, t a = 25 c) symbol parameter test conditions min typ. max unit t w pulse width at mr v cc > v th - +0.2v, v il =0.3 v cc , v ih =0.7 v cc 100 - - ns at wdi v cc > v th - +0.2v, v il =0.3 v cc , v ih =0.7 v cc 50 - - ns switching characteristics (@ r l = 1m ? , c l = 50pf, t a = 25 c) symbol parameter test conditions min typ. max unit t tout watchdog time out apx823/apx824/apx825a v cc > v th - +0.2v, see timing diagram 1.12 1.6 2.4 s t d delay time apx823/apx824/apx825a v cc > v th- +0.2v, see timing diagram 140 200 280 ms t phl propagation (delay) time, high-to-low-level output mr to reset delay (apx823/apx825a) v cc > v th - +0.2v, v il =0.3 v cc , v ih =0.7 v cc - - 0.1 s v cc to reset delay v il = v th - -0.2v, v ih = v th - +0.2v - - 25 s t plh propagation (delay) time, low-to-high-level output mr to reset delay (apx824/apx825a) v cc > v th - +0.2v, v il =0.3 v cc , v ih =0.7 v cc - - 0.1 s v cc to reset delay (apx824/apx825a) v il = v th - -0.2v, v ih = v th - +0.2v - - 25 s
apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 7 of 12 www.diodes.com may 2011 ? diodes incorporated timing diagram t vth vth d dd t /reset vth reset t vcc d t reset vs vcc timing diagram d /mr vcc vth t t d /reset reset vs /mr timing diagram vth t wdi d t d t wd t wd t d /reset vcc reset vs wdi timing diagram
apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 8 of 12 www.diodes.com may 2011 ? diodes incorporated typical characteristics reset timeout period vs. temperature 150 160 170 180 190 200 210 220 230 240 250 -40 -25 0 25 50 85 105 125 temperature reset timeout period (ms) reset threshold voltage vs. temperature 2.8 2.85 2.9 2.95 3 3.05 3.1 3.15 3.2 -40 -25 0 25 50 85 105 125 temperature reset thershold voltage (v) vcc supply current vs. temperature (vcc=3.3v vth=2.93v) 25 26 27 28 29 30 31 32 33 34 35 -40 -25 0 25 50 85 105 125 temperature vcc supply current (ua) supply curreny vs. vcc 0 5 10 15 20 25 30 35 40 1.5v 2.5v 3.3v 4.0v 5.0v 5.5v vcc supply current (ua)
apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 9 of 12 www.diodes.com may 2011 ? diodes incorporated ordering information ? apx82 xx - xx xx g - 7 part no. 3 : apx823 4 : apx824 voltage 46 : 4.63 44 : 4.38 40 : 4.00 31 : 3.08 29 : 2.93 26 : 2.63 23 : 2.25 5a : apx825a package w5 : sot25 w6 : s ot26 green packing g : green 7 : tape & reel device package code packaging (note 5) 7? tape and reel quantity part number suffix apx823-xxw5g-7 w5 sot25 3000/tape & reel -7 apx824-xxw5g-7 w5 sot25 3000/tape & reel -7 apx825a-xxw6g-7 w6 sot26 3000/tape & reel -7 notes: 5. pad layout as shown on diodes inc. suggested pad layout document ap02001, which can be found on our website at ht tp://www.diodes.com/ datasheets/ap02001.pdf. marking information (1) sot25 1 2 3 5 7 4 xx y w x ( top view ) xx : identification code w : week : a~z : 1~26 week; x : a~z : green y : year 0~9 a~z : 27~52 week; z represents 52 and 53 week (2) sot26 1 2 3 6 7 4 xx y w x ( top view ) xx : identification code w : week : a~z : 1~26 week; x : a~z : green y : year 0~9 a~z : 27~52 week; z represents 52 and 53 week 7 5
apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 10 of 12 www.diodes.com may 2011 ? diodes incorporated marking information (cont.) marking table device package type identification code apx823-46w5 sot25 w1 apx823-44w5 sot25 w2 apx823-40w5 sot25 w3 apx823-31w5 sot25 w4 apx823-29w5 sot25 w5 apx823-26w5 sot25 w6 apx823-23w5 sot25 w7 apx824-46w5 sot25 t2 apx824-44w5 sot25 t3 apx824-40w5 sot25 t4 apx824-31w5 sot25 t5 apx824-29w5 sot25 t6 apx824-26w5 sot25 t7 apx824-23w5 sot25 t8 apx825a-46w6 sot26 t9 apx825a-44w6 sot26 ta apx825a-40w6 sot26 tb apx825a-31w6 sot26 tc apx825a-29w6 sot26 td apx825a-26w6 sot26 te apx825a-23w6 sot26 tf package outline dimensions (all dimensions in mm) (1) package type: sot25
apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 11 of 12 www.diodes.com may 2011 ? diodes incorporated package outline dimensions (cont.) (all dimensions in mm) (2) package type: sot26 notes: 6. package outline dimensions as shown on diodes inc. package outline dimensio ns document ap02002, which can be found on our website at http://www.diodes.com /datasheets/ap02002.pdf
apx823/apx824/apx825a processor supervisory circuits apx823/apx824/apx825a document number: ds31323 rev. 4 - 2 12 of 12 www.diodes.com may 2011 ? diodes incorporated important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to this document and any product described herein. diodes incorporated does not assume any liabi lity arising out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license under its patent or trademark rights, nor the rights of others. any customer or user of this document or products desc ribed herein in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthoriz ed sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fee s arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized a pplication. products described herein may be covered by one or more united states, international or foreign patents pending. product names and markings noted herein may also be covered by one or more united states, international or foreign trademarks. life support diodes incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. 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 significant injury to the user. b. a critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of diodes incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety-critical, life support devices or systems. copyright ? 2011, diodes incorporated www.diodes.com

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