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multiple input prog rammable supervisory ics adm6305/adm6306 rev. 0 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 ? 2010 analog devices, inc. all rights reserved. features adjustable input threshold voltage options : 0.4 v and 1.23 v pre - trimmed v cc t hreshold o ptions (adm6306) increments between 2.5 v and 5 v manual reset input (adm6306) 4 f actory programmed reset timeo ut delays 1 ms, 20 ms, 140 ms , and 1.12 s ec (mi ni mum) rese t output stage: active low , open drain lo w power co nsumption : 5 a typical powe r supply glitch i mmunity 5-l ead sot - 23 p ackage temperature range: ?40c to +125c a pplications portable/ battery - operated equipment m icroprocessor systems multivoltage applications f unctional b lock d iagram s reset generator reset 0.4v/1.23v rst in1 v cc gnd 0.4v/1.23v rst in2 adm6305 09345-001 figure 1. reset generator glitch rejection reset 1.23v gnd 0.4v/1.23v rst in mr adm6306 v cc v cc 09345-002 figure 2. g eneral d escription the adm6305/ adm6306 are dual voltage supervisors designed to monitor two supplies and provide a reset signal to dsp - and microprocessor - based systems. low supply current and a small form factor make these devices su itable for portable and battery - operate d applications. if a monitored power supply voltage falls below the minimum voltage threshold, a single active low output asserts triggering a system reset. once all voltages rise above the selected threshold level, the reset signal remains low for the re set timeout period . four reset timeout options are available. t he adm6305 monitors two supplies via two adjustable resistor- programmable undervoltage reset input s . both rst in1 and rst in2 have a reset th reshold of either 0.4 v or 1.23 v depending on the p articular mod el ; that is, the rst in1 and rst in2 threshold of the adm6305 dxa rjz model is 1.23 v, while in the case of adm6305 dx arjz 1 model , it is 0.4 v. the v cc input of the adm6305 is not a monitored input. t he adm 6306 has one adju stable undervoltage res et input, rst in, which features a choice of reset threshold , 0.4 v or 1.23 v ( see the ordering guide for more information ). the adm6306 incorporates a variety of internally pretrimmed v cc undervoltage threshold op tions for monitoring supply voltages in increments between 2.5 v and 5 v. the adm6306 also includes a manual reset input. t he adm6 305/adm6306 reset output remains valid as long as v cc excee ds 0.9 v. the adm6305/adm6306 are available in a 5- lead sot - 23 package . the se device s are specified over the temperature range of ?40c to +125c .
adm6305/adm6306 rev. 0 | page 2 of 12 table of contents features .............................................................................................. 1 app lications ....................................................................................... 1 functional block diagrams ............................................................. 1 general description ......................................................................... 1 re vision history ............................................................................... 2 specifications ..................................................................................... 3 absolute maximum ratings ............................................................ 4 the rmal resistance ...................................................................... 4 esd caution .................................................................................. 4 pin configurations and function descriptions ............................5 typical performance characteristics ..............................................6 theory of operation .........................................................................8 input configuration ......................................................................8 reset output configuration ........................................................8 manual reset ..................................................................................8 options ...............................................................................................9 outline dimensions ....................................................................... 11 ordering guide .......................................................................... 11 revision history 10 /10 rev ision 0: initial version
adm6305/adm6306 rev. 0 | page 3 of 12 specifications v cc = 2.5 v to 5 v for the a dm6305, v cc = (v th + 2 .5%) to 5.5 v for the adm6306. t a = ? 40c to +125 c, unless othe r wise noted. typical values are at t a = 25 c. table 1. parameter min typ max unit test conditions/comments operating voltage range, v cc 1 0.9 5.5 v 0.9 v v cc that guarantees valid output input current, i cc 5 16 a v cc = 5.5 v, t a = ?40c to +85c 5 20 a v cc = 5.5 v, t a = ?40c to +125c v cc threshold voltage (adm6306) 2 v th ? 1% v th v th + 1% v t a = 25c v th ? 1 .5% v th v th + 1.5 % v t a = ?40c to +85c v th ? 2.5% v th v th + 2.5% v t a = ?40c to +125c reset threshold temperature coefficient 25 ppm/c reset threshold hysteresis (v hyst ) 2 v th mv reset timeout period (t rp ) adm630xd1 1.0 1.4 2.0 ms adm630xd2 20 28 40 ms adm630xd3 140 200 280 ms adm630xd4 1120 1570 2240 ms reset output voltage (v ol ) 0.4 v v cc > 4.25 v, i sink = 3.2 ma 0.3 v v cc > 2.5 v, i sink = 1.2 ma 0.3 v v cc > 1.2 v, i sink = 500 a 0.3 v v cc > 1 v, i sink = 50 a 0.3 v v cc > 0 .9 v, i sink = 25 a mr input (adm6306) v il 0.8 v v th > 4.0 v 0.3 v cc v v th < 4.0 v v ih 2.4 v v th > 4.0 v 0.7 v cc v v th < 4.0 v mr minimum input pulse width 1 s t a = 0c to +70c 1.5 s t a = ?40c to +125c mr glitch rejection 0.1 s mr to reset delay 500 ns mr pull - up resistance 32 63.5 100 k 1.23 v adjustable reset comparator input rst i nx input threshold, v rsth 1.22 1.23 1.2 4 v t a = 25c 1.211 1.23 1.249 t a = ?40c to +85c 1.20 1.26 v t a = ?40c to +125c rst inx input current, i rst i nx ?25 +25 na 0 v < v rst in < v cc C 0.3 v 3 , t a = ?40c to +85c ?25 +25 na v rst in = v rsth r st inx hysteresis 2.5 mv 0.4 v adjustable reset compartor input rst inx input threshold, v rsth 0.396 0.40 0.404 v t a = 25c 0.394 0.40 0.40 6 v t a = ?40c to +85c 0.39 0.40 0.41 v t a = ?40c to +125c rst inx input current, i rst i nx ?25 +25 na 0 v < v rst inx < v cc C 0.3 v 3 , t a = ?40c to +85c ?25 +25 na v rst in = v rsth 1 the adm6305 switch es from undervoltage reset to normal operation when 1.5 v > v cc < 2.5 v. 2 the amd6306 monitors v cc through an internal factory trimmed voltage divider, which programs the nominal reset threshold. factory - trimmed reset thre s holds are available in approximately 100 mv increments from 2. 5 v to 5 v. 3 guaranteed b y design.
adm6305/adm6306 rev. 0 | page 4 of 12 absolute maximum ratings table 2 . parameter rating v cc ? 0.3 v to +6 v all pins (except v cc ) ? 0.3 v to (v cc + 0.3 v) input/output current 20 ma rate of rise, v cc 100 v/ s storage temperature range ? 65c to +160c operating temperature range ? 40c to +125c lead temperature (10 sec) 300c junction temperature 150c stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only and 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. thermal resistance table 3 . package type ja unit 5- lead sot - 23 240 c/w esd caution
adm6305/adm6306 rev. 0 | page 5 of 12 pin configuration s and function descrip tions reset 1 rst in1 3 gnd 2 v cc 5 rst in2 3 adm6305 top view (not to scale) 09345-003 figure 3. adm6305 pin configuration table 4 . adm6305 pin function descriptions pin o. mnemonic descrip tion 1 reset active low, open - drain reset output. 2 gnd ground. 3 rst in1 adjustable reset comparator input. this pin asserts reset if the input voltage is below threshold. its high input impedance allows the use of an external resistor divider to program the monitoring threshold. connect this pin to v cc if it is not used. 4 rst in2 adjustable reset comparator input. this pin asserts reset if the input voltage is below threshold. i ts high input impedance allows the use of an external resistor divider to program the monitoring threshold. connect this pin to v cc if it is not used. 5 v cc power supply input. v cc is not monitored on adm6305. reset 1 mr 3 gnd 2 v cc 5 rst in 3 adm6306 top view (not to scale) 09345-004 figure 4. adm630 6 pin configuration table 5 . adm6306 pin function descriptions pin o. mnemonic description 1 reset active low, open - drain reset output. 2 gnd ground. 3 mr manual reset input . 4 rst in adjustable reset comparator input. this pin asserts reset if the input voltage is below threshold. its high input impedance allows the use of an external resistor divider to program the monitoring threshold. connect this pin to v cc if it is not used. 5 v cc power supply input . v cc is not monitored on adm6306.
adm6305/adm6306 rev. 0 | page 6 of 12 typical performance characteristics 6.0 3.0 3.5 4.0 4.5 5.0 5.5 ?40 ?20 0 20 40 60 80 100 120 125 supply current (a) temperature (c) v cc = 2.5v v cc = 3.5v v cc = 4.5v v cc = 5.5v 09345-005 figure 5 . supply current vs. temperature 1.10 0.85 0.90 0.95 1.00 1.05 ?40 ?20 0 20 40 60 80 100 120 125 normalized reset timeout temperature (c) 09345-006 figure 6 . reset timeout vs. te mperature 1.010 0.990 0.992 0.994 0.996 0.998 1.000 1.002 1.004 1.006 1.008 ?40 ?20 0 20 40 60 80 100 120 125 normalized reset threshold (v/v) temperature (c) 09345-007 figure 7 . reset threshold vs. temperature 90 80 70 60 50 40 30 20 10 0 ?40 ?20 0 20 40 60 80 100 120 125 propagation delay (s) temperature (c) 1mv/1s 10mv/1s 09345-008 figure 8. v cc falling propagation delay vs. temperature 10k 1k 100 10 1 0 400 800 1200 transient duration (s) overdrive, v th ? v cc (mv) transient duration (s) v th = 5v transient duration (s) v th = 2.5v 09345-009 figure 9 . maximum transient duration vs. v cc reset threshold overdrive 09345-010 120 0 20 40 60 80 100 ?40 ?20 0 20 40 60 80 100 120 125 propagation delay (s) temperature (c) 1mv/1s 10mv/1s figure 10 . rst in(v th = 1.23 v) falling propagation delay vs. temperature
adm6305/adm6306 rev. 0 | pag e 7 of 12 10k 1k 100 10 1 0 1200 1000 800 600 400 200 transient duration (s) overdrive, v ref ? v rst in (mv) transient duration (s) 5v transient duration (s) 3v 09345-011 figure 11 . maximum transient duration vs. rst in (v th = 1.23 v) threshold overdrive 120 0 20 40 60 80 100 ?40 ?20 0 20 40 60 80 100 120 125 rst inx propagation delay (s) temperature (c) 1mv/1s 10mv/1s 09345-012 figure 12 . rst in x (v th = 0.4 v) falling propagation delay vs. temperature 10k 1k 100 10 1 0 100 200 300 transient duration (s) overdrive, v ref ? v rst in (mv) transient duration (s) 5v transient duration (s) 3v 09345-013 figure 13 . maximum transient duration vs. rst in x (v th = 0.4 v) threshold overdrive
adm6305/adm6306 rev. 0 | page 8 of 12 theory of operation the adm6305 / adm6306 are compact, low p ower supervisory circuit s capable of monitori ng two voltage rails. if a monitored voltage drops below its associated threshold, the active low reset output asserts l ow. the adm6305 monitors two supplies via two adjustable resistor- programmable undervoltage reset inputs. both rst in1 and rst in2 have a reset threshold of either 0.4 v or 1.23 v depending on the particular model ; that is, th e rst in1 and rst in2 threshold of the adm6305 dxa rjz model is 1.23 v, while in th e case of adm6305 d xarjz 1 mod el , it is 0.4 v. t h e v cc input of the adm6305 is not a monitored input. the adm6306 has one adjustable undervoltage reset input, rst in, which features a choice of reset threshold, 0.4 v or 1.23 v ( see the ordering guide for more informati on ) . the adm6306 incorporates a variety of internally pretrimmed v cc undervoltage threshold options for monitoring supply voltages in increments between 2.5 v to 5 v. the adm6306 also includes a manual reset input. input configuration t he threshold voltag e at an adjustable input is either 0.4 v or 1.23 v. to m on itor a voltage greater than the typical adjustable threshold, v rsth , connect a resistor divider network to the circuit as depicted in figure 14 , where ? ? ? ? ? ? + = r2 r2r1 vv rsth th r2 r1 v rsth v in 09345-014 figure 14 . setting the adjustable monitor the high input impedance (leakage of 25 na ) of the adjustable inputs minimize s the offset error caused by the leakage current and e xternal resistor divider. this allows the user to a pply a divider with large resistance to minimize the loss. the offset v oltage caused by the leakage current is calculated by r1 25 na. the rst in x inputs are designed to ignore fast volta ge transients ( see figure 11 and figure 12) . increase the noise immunity by connecting a 0.1 f bypass capacitor between rst in x and ground. note that adding capacitance to rst in x slows the overall response time of the device . there is no hysteresis associated with the 0.4 v adjustable inputs; instead , a time - based glitch filter to prevent false triggering is used. the glitch filter avoids the need to use a portion of the operating supply range to provide hysteresis on this input. the adm6 305/ adm6306 are powered via v cc . figure 9 show s the maximum transient duration v s. v cc reset threshold overdrive, for which reset pulses are not generated. figure 9 depicts the maximum pulse width that a negative go ing v cc transient may typically have without causing reset to be asserted. as the amplitude of the transient increases, the maximum allowable pulse width decreases. the addition of a bypass capacitor on v cc provides additional transient i mmunity. reset output configu ration the adm6305/ adm6306 are available in a choice of four reset timeouts. once the monitored supplies rise above their associated threshold level, the reset signal remains low for the reset timeout period before deasserting. subsequently, if a monitored supply falls below its associated threshold , the reset output reasserts. t he open - drain reset output of the adm6 305/a dm6306 remains valid as long as v cc exceeds 0.9 v. t he adm6305 remain s in uvlo when v cc is below 1.5 v. t h e reset output is controlled by rts in x if v cc exceeds 2.5 v. the open - drain reset output allows the adm6305 and adm6306 to interface easily with microprocessors and devices with bidirectional reset pins. connecting the supervi - sory device s reset output directly to the microcontrollers reset pin with a single pull - up resistor allows either device to issue a system reset (see figure 15 ). adm6305/ adm6306 reset v cc microprocessor reset r pull-up 09345-015 figure 15 . interfacing to microprocessors with bidirectional reset output manual reset the adm6306 features a manual reset input ( mr ) which, when driven low, ass erts the reset output. when mr transitions from low to high, reset remains asserted for the duration of the reset active timeout period before deasserting. the mr input has a 63.5 k internal pull - up resistor so that the input is always high when unconnected. an external push - button switch can be connected between mr and ground so that the user can generate a reset. debounce circuitry is integra ted on - chip for this purpose. noise immunity is provided on the mr input, and fast, negative - going transients of up to 0.1 s (typ ical ) are ignored. if required, a 0.1 f capacitor between mr and ground provides additio nal noise immunity.
adm6305/adm6306 rev. 0 | page 9 of 12 options table 6 . adm6306 v cc reset voltage threshold options reset threshold number t a = 25c t a = ? 40c to +125c unit min typ max min max 25 2.463 2.5 2.538 2.438 2.563 v 26 2.591 2.63 2.669 2.564 2.696 v 27 2.66 2.7 2.741 2.633 2.768 v 28 2.758 2.8 2.842 2.73 2.87 v 29 2.886 2.93 2.974 2.857 3 v 30 2.955 3 3.045 2.925 3.075 v 31 3.034 3.08 3.126 3.003 3.157 v 32 3.152 3.2 3.248 3.12 3.28 v 33 3.251 3.3 3.35 3.218 3.383 v 34 3.349 3.4 3.451 3.315 3.485 v 35 3.448 3.5 3.553 3.413 3.588 v 36 3.546 3.6 3.654 3.51 3.69 v 37 3.645 3.7 3.756 3.608 3.793 v 38 3.743 3.8 3.857 3.705 3.895 v 39 3.842 3.9 3.959 3.803 3.998 v 40 3.94 4 4.06 3.9 4.1 v 41 4.039 4.1 4.162 3.998 4.203 v 42 4.137 4.2 4.263 4.095 4.305 v 43 4.236 4.3 4.365 4.193 4.408 v 44 4.314 4.38 4.446 4.27 4.49 v 45 4.433 4.5 4.568 4.388 4.613 v 46 4.561 4.63 4.699 4.514 4.746 v 47 4.63 4.7 4.771 4.583 4.818 v 48 4.728 4.8 4.872 4.68 4.92 v 49 4.827 4.9 4.974 4.778 5.023 v 50 4.925 5.0 5.075 4.875 5.125 v table 7 . reset timeout options reset timeout period code t a = ?40c to +125c unit min typ max adm630x d1 1.0 1.4 2.0 ms adm630x d2 20 28 40 ms adm630x d3 140 200 280 ms adm630x d4 1120 1570 2240 ms table 8 . adjustable input threshold options model monitored input threshold rst in1 rst i n2 rst in adm6305_ _ _ _ _z -rl7 1.23 v 1.23 v n/a adm6305_ _ _ _ _z1 -rl7 0.4 v 0.4 v n/a adm6306_ _ _ _ _ _ _z -r7 n/a n/a 1.23 v adm6306_ _ _ _ _ _ _z1 -r7 n/a n/a 0.4 v
adm6305/adm6306 rev. 0 | page 10 of 12 09345-016 adm6305d_arjz_-rl7 reset timeout period code (1 to 4) temperature range a: ?40c to +125c package designator rj = sot-23 z = lead-free packing material rl7 = 7? tape & reel (3000 piece quantity) rst in1 & rst in2 adjustable threshold 1:0.4v & 0.4v blank: 1.23v & 1.23v figure 16 . adm6305 ordering code structure 09345-017 adm6306d_ _ _arjz_r7 reset timeout (1 to 4) reset threshold number (see table 6) temperature range a: ?40c to +125c package designator rj = sot-23 z = lead-free packing material r7 = 7? tape & reel (3000 piece quantity) rst in adjustable threshold 1:0.4v dash: 1.23v figure 17 . adm6306 ordering code structure table 9 . standard models model monitored input threshold minimum reset timeout rst i1 rst i2 v cc reset rst i adm6305d3arjz - rl7 1.23 v 1.23 v n/a n/a 140 ms adm630 5d3 a rjz 1- rl7 0.4 v 0.4 v n/a n/a 140 ms adm6306d131arjz -r7 n/a n/a 3.08 v 1.23 v 1 ms adm6306d131 a rjz1r7 n/a n/a 3.08 v 0.4 v 1 ms adm6306d331arjz -r7 n/a n/a 3.08 v 1.23 v 140 ms
adm6305/adm6306 rev. 0 | page 11 of 12 outline dimensions compliant to jedec standards mo-178-aa 121608- a 10 5 0 sea ting plane 1.90 bsc 0.95 bsc 0.20 bsc 5 1 2 3 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 0.35 min 0.55 0.45 0.35 figure 18 . 5 - lead small outline transistor package [sot - 23] (rj -5) dimensions shown in millimeters 09345-019 round sprocket holes direction of feed pin 1 marker figure 19 . adm6305/ adm6306 reel orientation ordering guide model 1 , 2 , 3 temperature range ordering quantity 4 package description package option brand ing adm6305d3arjz - rl7 ?40c to +125c 3,000 5- lead sot - 23 rj -5 lg9 adm6305d3arjz1 - rl7 ?40c to +125c 3,000 5- lead sot - 23 rj -5 lg8 adm6306d131arjz -r7 ?40c to +125c 3,000 5- lead sot - 23 rj -5 lga adm6306d331arjz -r7 ?40c to +125c 3,000 5- lead sot - 23 rj -5 lg 6 adm6306d131arjz1r7 ?40c to +125c 3,000 5- lead sot - 23 rj -5 lgc 1 adm6305 and adm6306 follow the c2 pin 1 orientation standard for tape and reel packaging ( see figure 19 ). 2 if ordering nonstandard models, complete the ordering code shown in figure 16 and figure 17 by insertin g the reset threshold, reset timeout, and adjustable threshold suffixes. contact sales for availability of nonstandard models, quoting adm6305 - ntsd or adm6306 - ntsd first, and then the complete ordering code. 3 z = rohs compliant part. 4 a minimum of 10,000 must be ordered for nonstandard models.
adm6305/adm6306 rev. 0 | page 12 of 12 notes ? 2010 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective ow ners. d09345 -0- 10/10(0)

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