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quad voltage microprocessor supervisory circuit adm6339 rev. a information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062-9106, u.s.a. tel: 781.329.4700 www.analog.com fax: 781.461.3113 ?2009C2010 analog devices, inc. all rights reserved. features accurate monitoring of up to four power supply voltages 6 factory-set threshold options: ?5.0 v, +1.8 v, +2.5 v, +3.0 v, +3.3 v, and +5.0 v adjustable input threshold options: ?0.5 v (2.0% accuracy), +0.62 v (0.8% accuracy), and +1.23 v 200 ms typical reset timeout open-drain reset output (10 a internal pull-up) reset output stage: active low, valid to in 1 = 1 v or in 2 = 1 v low power consumption (55 a) glitch immunity specified from ?40c to +85c 6-lead sot-23 package applications telecommunications microprocessor systems data storage equipment servers/workstations functional block diagram v ref in 4 in 3 in 2 in 1 200ms timeout adm6339 in 2 in 1 5v pullup 08169-001 reset figure 1. general description the adm6339 is a high accuracy supervisory circuit capable of monitoring up to four system supply voltages. the adm6339 incorporates a variety of internally pretrimmed undervoltage threshold options for monitoring ?5.0 v, +1.8 v, +2.5 v, +3.0 v, +3.3 v, and +5.0 v supply voltages. tolerance levels of 5% and 10% are available. the device is also available with one to three adjustable threshold options. the adjustable voltage threshold options are +1.23 v, +0.62 v, and ?0.5 v. see the ordering guide section for a list and description of all available options. if a monitored power supply voltage decreases below the mini- mum voltage threshold (or rises above the maximum voltage threshold for the ?0.5 v and ?5.0 v input options), a single active low output asserts, triggering a system reset. the output is open drain with a weak internal pull-up to the monitored in 2 supply of typically 10 a. after all voltages exceed the selected threshold level, the reset signal remains low for the reset timeout period (200 ms typical). the adm6339 output remains valid as long as in 1 or in 2 exceeds 1 v. unused monitored inputs should not be allowed to float or to be grounded; instead, they should be connected to a supply voltage greater than their specified threshold voltages. the adm6339 is available in a 6-lead sot-23 package. the device operates over the extended temperature range of ?40c to +85c.
adm6339 rev. a | page 2 of 12 table of contents features .............................................................................................. 1 applications ....................................................................................... 1 functional block diagram .............................................................. 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 absolute maximum ratings ............................................................ 4 esd caution .................................................................................. 4 pin configuration and function descriptions ............................. 5 typical performance characteristics ..............................................6 theory of operation .........................................................................8 input configuration ......................................................................8 monitoring negative voltages < ?5.0 v .....................................8 user adjustable threshold options ...........................................8 reset output configuration .....................................................9 outline dimensions ....................................................................... 10 ordering guide .......................................................................... 10 revision history 10/10rev. 0 to rev. a added figure 19 .............................................................................. 10 6/09revision 0: initial version
adm6339 rev. a | page 3 of 12 specifications v in2 = 1.0 v to 5.5 v, t a = ?40c to +85c, unless otherwise noted. typical values are v in2 = 3.0 v to 3.3 v, t a = 25c. table 1. parameter min typ max units test conditions/comments operating voltage range (v in2 ) 1 , 2 1.0 5.5 v input current in x input current 25 40 a v inx = nominal input voltage for 1.8 v, 2.5 v, and 5.0 v supplies. 55 115 a v in2 = nominal input voltage for 3.0 v and 3.3 v supplies. v in2 is also the device power supply. the supply splits into 25 a for the resistor divider and 30 a for other circuits. ?0.1 +0.1 a v inx = 0 v to v in2 (input threshold voltage = 1.23 v). 0.4 1.5 a v in1 = 1.5 v (adm6339k and adm6639l models only). ?15 ?20 a v inx = ?5.0 v (in x input threshold voltage = ?5.0 v). ?0.1 +0.1 a v inx = 0.62 v (in x input threshold voltage = 0.62 v). ?1 ?3 ?5 a v inx = ?0.5 v (in x input threshold voltage = ?0.5 v). threshold voltage fixed threshold voltage (v th ) 4.50 4.63 4.75 v 5.0 v (?5% tolerance) threshold. v inx decreasing 4.25 4.38 4.50 v 5.0 v (?10% tolerance) threshold. 3.00 3.08 3.15 v 3.3 v (?5% tolerance) threshold. 2.85 2.93 3.00 v 3.3 v (?10% tolerance) threshold. 2.70 2.78 2.85 v 3.0 v (?5% tolerance) threshold. 2.55 2.63 2.70 v 3.0 v (?10% tolerance) threshold. 2.13 2.19 2.25 v 2.5 v (?10% tolerance) threshold. 1.53 1.58 1.62 v 1.8 v (?10% tolerance) threshold. v inx increasing ?4.75 ?4.63 ?4.50 v ?5.0 v (+5% tolerance) threshold. ?4.50 ?4.38 ?4.25 v ?5.0 v (+10% tolerance) threshold. adjustable threshold voltage (v th ) v inx decreasing 1.20 1.23 1.26 v 0.615 0.620 0.625 v v inx increasing ?0.497 ?0.487 ?0.477 v ?0.5 v threshold. reset threshold hysteresis (v hyst ) 0.3 % v th 0.47 % v th in 4 , adm6339q model. reset threshold temperature coefficient (tcv th ) 60 ppm/c in x to reset delay (t rd ) 30 s v inx = v th to (v th ? 50 mv) for all inputs except ?0.5 v and ?5.0 v; v inx = v th to (v th + 50 mv) for ?5.0 v and ?0.5 v inputs only. reset timeout period (t rp ) 140 200 280 ms reset output low (v ol ) 0.4 v v in2 = 5.0 v, i sink = 2 ma. 0.4 v v in2 = 2.5 v, i sink = 1.2 ma. 0.4 v v in2 = v in1 = 1 v, i sink = 50 a. 0.4 v v in1 =1v, v in2 = 0 v, i sink = 20 a 0.4 v v in1 =0 v, v in2 = 1 v, i sink = 20 a reset output high (v oh ) 0.8 v in2 v v in2 2.55 v, i source = 6 a, reset not asserted. reset output high source current (i oh ) 10 a v in2 2.55 v, reset not asserted. 1 the device is powered by input in 2 . 2 the reset output is guaranteed to be in the correct state for in 1 or in 2 down to 1 v.
adm6339 rev. a | page 4 of 12 absolute maximum ratings table 2. parameter rating v cc , reset , gnd ?0.3 v to +6 v continuous reset current 20 ma in x (positive reset threshold) ?0.3 v to +6 v in 4 (negative reset threshold, ? 5 v) ?6 v to +0.3 v in 4 adm6339q model (negative reset threshold, ? 0.5 v) ?2 v to +0.3 v storage temperature range ?65c to +125c operating temperature range ?40c to +85c lead temperature (10 sec) 300c junction temperature 135c stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. table 3. thermal resistance package type ja unit 6-lead sot-23 169.5 c/w esd caution
adm6339 rev. a | page 5 of 12 pin configuration and fu nction descriptions in 1 1 in 2 2 in 3 3 6 gnd 5 in 4 4 adm6339 top view (not to scale) 08169-002 reset figure 2. pin configuration table 4. pin function descriptions pin no. mnemonic description 1 in 1 monitored input voltage 1. 2 in 2 monitored input voltage 2. in 2 is the power supply input for the adm6339. 3 in 3 monitored input voltage 3. 4 in 4 monitored input voltage 4. 5 gnd ground. 6 reset active low reset output. reset goes low when an input drops below th e specified threshold (or above in the case of the ?0.5 v and ?5.0 v input options). af ter all inputs rise above the threshold voltage, reset remains low for 200 ms (typical) before going high. reset is open drain with a weak internal pull-up to in 2 , typically 10 a.
adm6339 rev. a | page 6 of 12 typical performance characteristics v in2 = v cc = 3.0 v, t a = 25c, unless otherwise noted. 60 40 ?40 85 08169-010 temperature (oc) in 2 input current (a) 58 56 54 52 50 48 46 44 42 ?15 10 35 60 v in2 = 3.3v v in2 = 3v figure 3. in 2 input current vs. temperature 120 0 05 08169-011 in 2 voltage (v) in 2 input current (a) . 5 100 80 60 40 20 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 figure 4. in 2 input current vs. in 2 voltage 08169-007 ?0.20 ?0.15 ?0.10 ?0.05 0 0.05 normalized threshold error (%) temperature (c) ?40 ?20 0 20 40 60 80 5v 1.8v figure 5. normalized threshold error vs. temperature 100 0 01 08169-012 reset threshold overdrive (mv) maximum in x transient duration (s) 0 0 0 90 80 70 60 50 40 30 20 10 100 200 300 400 500 600 700 800 900 reset asserted above this line figure 6. maximum in x transient duration vs. reset threshold overdrive 100 0 01 08169-013 reset threshold overdrive (mv) 0 0 0 90 80 70 60 50 40 30 20 10 100 200 300 400 500 600 700 800 900 reset delay (s) figure 7. reset delay vs. reset threshold overdrive (in x decreasing) 214 202 ?40 85 08169-014 temperature (oc) reset timeout delay (ms) 212 210 208 206 204 ?15103560 figure 8. reset timeou t delay vs. temperature
adm6339 rev. a | page 7 of 12 c3 c2 08169-015 c2 dc1m 2.00v/div ?6.000v offset bwl c3 dc1m 1.00v/div 2.040v offset bwl timebase 0.0s 10.0 s/div 2.0 gs/s 200ks trigger 0.0s ?520mv stop negative edge reset in x figure 9. reset pull-up and pull-down response (10 s/div) 0 8169-009 ?40 ?20 0 20 40 60 80 0.62v v in trip threshold (v) temperature (c) 0.610 0.615 0.620 0.625 0.630 figure 10. 0.62 v input voltage trip threshold vs. temperature c3 c2 08169-016 c2 dc1m 2.00v/div ?6.000v offset bwl c3 2.00v/div 2.000v offset bwl 50.0 ms/div 1.0 ms/s 500ks trigger dc 680mv normal positive edge dc1m ?101ms c3 timebase in x reset figure 11. reset timeout delay (50 ms/div) 0 8169-008 ?0.510 ?0.505 ?0.500 ?0.495 ? 0.490 ?40?200 20406080 ?0.5v v in trip threshold (v) temperature (c) figure 12. ?0.5 v input voltage trip threshold vs. temperature
adm6339 rev. a | page 8 of 12 theory of operation the adm6339 is a compact, low power supervisory circuit that is capable of monitoring up to four voltages in a multisupply application. the device includes several factory-set voltage threshold options f o r m o n i t o r i n g ? 5 . 0 v, + 1 . 8 v, + 2 . 5 v, + 3 . 0 v, + 3 . 3 v, a n d + 5 . 0 v supplies. the adm6339 is available with one to three adjustable threshold options. the adjustable voltage threshold options available are +1.23 v, +0.62 v, and ?0.5 v. see the ordering guide section for a list and description of all available options. input configuration built-in hysteresis improves the adm6339s immunity to short input transients, without noticeably reducing the threshold accuracy. the internal comparators each have a hysteresis of 0.3% with respect to the reset threshold voltage. (the in 4 input of the adm6339q model has a hysteresis of 0.47% with respect to its reset threshold voltage of ?0.487 v.) monitored inputs are resistant to short power supply glitches. figure 6 depicts the adm6339 glitch immunity data. to increase noise immunity in noisy applications, place a 0.1 f capacitor between the in 2 input and ground. adding capacitance to in 1 , in 3 , and in 4 also improves noise immunity. 08169-003 in 1 adm6339 monitored supplies microprocessor in 2 reset in 3 in 4 gnd figure 13. typical applications circuit in 2 must always be used for normal operation because it is the devices power supply input. do not allow unused monitor inputs to float or to be grounded. unused in 3 or in 4 inputs with positive thresholds can be connected directly to the in 2 input. unused in 4 options with negative thresholds must be tied to a more negative supply. monitoring negative voltages < ?5.0 v a number of adm6339 models include a pretrimmed threshold option to monitor ?5.0 v voltage levels. use a low impedance resistor divider network similar to that shown in figure 14 to monitor supplies more negative than ?5.0 v. the current through the external resistor divider should be greater than the input current for the ?5.0 v monitor options. for an input monitor current error of <1%, the resistor network current should be greater than or equal to 2 ma (for i in4 = 20 a maximum). set r 2 = 2.5 k. calculate r 1 based on the desired v inth reset threshold voltage, using the following equation: r 1 = r 2 (( v inth / v th ) ? 1) where: r 2 2.49 k. v inth is the desired threshold voltage. v th is the internal threshold voltage. for example, when monitoring a nominal voltage of ?12 v, v inth = ?11.1 v, v th = ?4.63 v, and r 2 = 2.49 k. therefore, using the previous equation, r 1 = 3.48 k. 08169-004 r 2 r 1 v inth adm6339 figure 14. negative voltage monitoring user adjustable threshold options the adm6339 offers the choice of three adjustable in x input threshold voltages: +1.23 v, +0.62 v, or ?0.5 v. when using an adjustable threshold of 1.23 v (typical), to monitor a voltage greater than 1.23 v, connect a resistor divider network to the device as shown in figure 15 . v inth , the desired threshold voltage, can be expressed as v inth = 1.23 v(( r 1 + r 2 )/( r 2 )) the adm6339 has a guaranteed input current of 0.1 a on its 1.23 v adjustable input. resistor values up to 100 k can be used for r 2 with <1% error. 0 8169-005 v inth r 1 r 2 v ref = 1.23v adm6339 figure 15. setting the 1.23 v adjustable monitor the same approach is taken when using the 0.62 v (typical) adjustable threshold input. use the following equation to solve for the values of r 1 and r 2 : v inth = 0.62 v(( r 1 + r 2 )/( r 2 )) the 0.62 v (typical) adjustable threshold input offers high threshold accuracy of 0.8%.
adm6339 rev. a | page 9 of 12 when monitoring a voltage more negative than ?0.5 v, a scheme similar to that previously described in the monitoring negative voltages < ?5.0 v section is used. for an input monitor current error of <1%, the resistor network current should be 500 a (for i in4 = 5 a maximum). calculate r 1 based on the desired v inth reset threshold voltage, using the following equation: r 1 = r 2 (( v inth / v th ) ? 1) where v inth is the desired threshold voltage and v th is the internal threshold voltage, ?0.487 v (typical). reset output configuration the reset output asserts low if a monitored inx voltage drops below its voltage threshold (or goes above its associated threshold in the case of the ?0.5 v and ?5.0 v input options). after all voltages exceed their associated threshold level, the reset signal remains low for the reset timeout period, t rp (200 ms typical). 08169-017 in x reset v th t rd 10% 90% t rp figure 16. adm6339 reset timing reset is open drain with a weak internal pull-up to in 2 of 10 a (typical). many applications that interface with other logic devices do not require an external pull-up resistor. however, if an external pull-up resistor is required and it is connected to a voltage ranging from 0 v to 5.5 v, the resistor overdrives the internal pull-up. reverse current flow from the external pull-up voltage to in 2 is prevented by the internal circuitry. 08169-006 adm6339 reset 100k ? reset v cc 5 v in 2 = 3.3 v figure 17. interfacing with a different logic supply voltage
adm6339 rev. a | page 10 of 12 outline dimensions compliant to jedec standards mo-178-ab 121608-a 10 4 0 seating plane 1.90 bsc 0.95 bsc 0.60 bsc 65 123 4 3.00 2.90 2.80 3.00 2.80 2.60 1.70 1.60 1.50 1.30 1.15 0.90 0 .15 max 0 .05 min 1.45 max 0.95 min 0.20 max 0.08 min 0.50 max 0.30 min 0.55 0.45 0.35 pin 1 indicator figure 18. 6-lead small outline transistor package [sot-23] (rj-6) dimensions shown in millimeters 08169-018 round sprocket holes direction of feed pin 1 marker figure 19. adm6339 reel orientation ordering guide model 1 , 2 nominal input voltage (v) tolerance (%) temperature range package description package option branding in 1 in 2 in 3 in 4 adm6339aarjz-rl7 5.0 3.3 2.5 adj (1.23) 10 ?40c to +85c 6-lead sot-23 rj-6 mbf adm6339barjz-rl7 5.0 3.3 2.5 adj (1.23) 5 ?40c to +85c 6-lead sot-23 rj-6 mbh adm6339carjz-rl7 5.0 3.3 1.8 adj (1.23) 10 ?40c to +85c 6-lead sot-23 rj-6 mbj adm6339darjz-rl7 5.0 3.3 1.8 adj (1.23) 5 ?40c to +85c 6-lead sot-23 rj-6 mbk adm6339earjz-rl7 5.0 3.0 2.5 adj (1.23) 10 ?40c to +85c 6-lead sot-23 rj-6 mbl adm6339farjz-rl7 5.0 3.0 2.5 adj (1.23) 5 ?40c to +85c 6-lead sot-23 rj-6 mbm adm6339garjz-rl7 5.0 3.0 1.8 adj (1.23) 10 ?40c to +85c 6-lead sot-23 rj-6 mbn adm6339harjz-rl7 5.0 3.0 1.8 adj (1.23) 5 ?40c to +85c 6-lead sot-23 rj-6 mbp adm6339iarjz-rl7 5.0 3.3 2.5 1.8 10 ?40c to +85c 6-lead sot-23 rj-6 mbq adm6339jarjz-rl7 5.0 3.3 2.5 1.8 5 ?40c to +85c 6-lead sot-23 rj-6 mbr ADM6339KARJZ-RL7 adj (1.23) 3.3 2.5 adj (1.23) 10 ?40c to +85c 6-lead sot-23 rj-6 mbs adm6339larjz-rl7 adj (1.23) 3.3 2.5 adj (1.23) 5 ?40c to +85c 6-lead sot-23 rj-6 mbu adm6339marjz-rl7 5.0 3.0 adj (1.23) ?5.0 10 ?40c to +85c 6-lead sot-23 rj-6 mb6 adm6339narjz-rl7 5.0 3.0 adj (1.23) ?5.0 5 ?40c to +85c 6-lead sot-23 rj-6 mb7 adm6339oarjz-rl7 5.0 3.3 adj (1.23) ?5.0 10 ?40c to +85c 6-lead sot-23 rj-6 mb8 adm6339parjz-rl7 5.0 3.3 adj (1.23) ?5.0 5 ?40c to +85c 6-lead sot-23 rj-6 mb5 adm6339qarjz-rl7 adj (0.62) 3.3 adj (0.62) adj (?0.5) 10 ?40c to +85c 6-lead sot-23 rj-6 mbx 1 z = rohs compliant part. 2 nominal input voltage is sp ecified with 10% tolerance.
adm6339 rev. a | page 11 of 12 notes
adm6339 rev. a | page 12 of 12 notes ?2009C2010 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d08169-0-10/10(a)

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