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open-drain microprocessor supervisory circuit in 4-lead sot-143 adm6315 rev. e 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 ?1999C2007 analog devices, inc. all rights reserved. features specified over temperature low power consumption (5 a typical) precision voltage monitor of voltages from 2.5 v to 5 v at 100 mv increments reset assertion down to v cc > 1 v reset timeout periods: 1 ms, 20 ms, 140 ms, or 1120 ms (minimum) built-in manual reset pin compatible with the adm811 available in sot-143 package applications microprocessor systems controllers intelligent instruments automotive systems safety systems portable instruments functional block diagram debounce adm6315 mr gnd reset v cc v ref reset circuitry 00081-001 figure 1. adm6315 gnd gnd 10k ? system power v cc microprocessor system 00081-011 reset reset mr figure 2. typical operating circuit general description the adm6315 is a reliable voltage-monitoring device that is suitable for use in most voltage-monitoring applications. the adm6315 is designed to monitor as little as a 1.8% degradation of a power supply voltage. the adm6315 can monitor all voltages (at 100 mv increments) from 2.5 v to 5 v. included in this circuit is a debounced manual reset input. reset can be activated using an ordinary switch (pulling mr low), a low input from another digital device, or a degradation of the supply voltage. the manual reset function is very useful, especially if the circuit in which the adm6315 is operating enters into a state that can be detected only by the user. allowing the user to reset a system manually can reduce the damage or danger that could otherwise be caused by an out-of-control or locked-up system. the adm6315 is available in a cost- and space-efficient sot-143 package.
adm6315 rev. e | 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 thermal resistance ...................................................................... 4 esd caution.................................................................................. 4 pin configuration and function descriptions............................. 5 typical performance characteristics ..............................................6 theory of operation .........................................................................7 interfacing to output of other devices .....................................7 benefits of a very accurate reset threshold .............................7 detailed description.....................................................................7 manual reset input .......................................................................7 transient immunity ......................................................................7 outline dimensions ..........................................................................8 ordering guide .............................................................................8 revision history 9/07rev. d to rev. e changes to absolute maximum ratings ....................................... 4 updated outline dimensions ......................................................... 8 changes to ordering guide ............................................................ 8 4/06rev. c to rev. d updated format..................................................................universal updated outline dimensions ......................................................... 8 changes to ordering guide ............................................................ 8 12/03rev. b to rev. c edit to absolute maximum ratings............................................... 3 edits to ordering guide .................................................................. 4 deleted table i and table ii ............................................................ 6 deleted table iii and table iv........................................................ 7 updated outline dimensions ......................................................... 8 2/03rev. a to rev. b edits to features.................................................................................1 edits to specifications .......................................................................2 edits to absolute maximum ratings ..............................................3 edits to ordering guide ...................................................................3 edits to table i and table ii .............................................................6 edits to table iii and table iv.........................................................7 updated outline dimensions..........................................................8 10/01rev. 0 to rev. a edits to table iii ................................................................................7 edits to table iv ................................................................................7 1999revision 0: initial version
adm6315 rev. e | page 3 of 12 specifications v cc = full operating range, t a = t min to t max , v cc typical = 5 v, unless otherwise noted. table 1. parameter min typ max unit test conditions/comments supply operating voltage 1 5.5 v t a = ?40c to +85c v cc supply current 5 12 a v cc = 5.5 v, no load, t a = ?40c to +85c 15 a v cc = 5.5 v, no load, t a = ?40c to +125c 4 10 a v cc = 3.6 v, no load, t a = ?40c to +85c 12 a v cc = 3.6 v, no load, t a = ?40c to +125c reset voltage threshold (v th ) v th ? 1.8% v th v th + 1.8% v t a = 25c v th ? 2.5% v th + 2.5% v t a = ?40c to +85c v th ? 3.5% v th + 3.5% v t a = ?40c to +125c reset threshold temperature coefficient 60 ppm/c v cc to reset delay 35 s v cc = falling at 1 mv/s reset active timeout period adm6315xxd1 1 1.4 2 ms t a = ?40c to +85c 0.8 2.4 ms t a = ?40c to +125c adm6315xxd2 20 28 40 ms t a = ?40c to +85c 16 48 ms t a = ?40c to +125c adm6315xxd3 140 200 280 ms t a = ?40c to +85c 112 336 ms t a = ?40c to +125c adm6315xxd4 1120 1570 2240 ms t a = ?40c to +85c 896 2688 ms t a = ?40c to +125c manual reset input threshold 0.8 v v th > 4 v (v il ) 2.4 v v th > 4 v (v ih ) 0.3 v cc v v th < 4 v (v il ) 0.7 v cc v v th < 4 v (v ih ) minimum input pulse 1 s glitch rejection 100 ns to reset delay 500 ns pull-up resistance 32 63 100 k reset output output voltage 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 v, i sink = 80 a output leakage current 1 a v cc > v th , reset deasserted
adm6315 rev. e | page 4 of 12 absolute maximum ratings t a = 25c, unless otherwise noted. thermal resistance table 2. parameter rating ja is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. terminal voltage (with respect to ground) table 3. thermal resistance v cc ?0.3 v to +6 v package type ja unit all other inputs ?0.3 v to +6 v 4-lead sot-143 330 c/w input current v cc 20 ma esd caution output current reset 20 ma operating temperature range ?40c to +125c storage temperature range ?65c to +160c lead temperature (soldering, 10 sec) 300c vapor phase (60 sec) 215c infrared (15 sec) 220c esd rating 2.5 kv 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.
adm6315 rev. e | page 5 of 12 pin configuration and fu nction descriptions gnd reset 1 4 mr v cc 2 3 adm6315 top view (not to scale) 00081-002 figure 3. pin configuration table 4. pin function descriptions pin no. mnemonic description 1 gnd ground reference for all signals, 0 v. 2 reset active low logic output. reset remains low while v cc is below the reset threshold or when mr is low. reset then remains low for a minimum of 1 ms, 20 ms, 140 ms, or 1120 ms after v cc rises above the reset threshold and mr is high. 3 mr manual reset. this active low debounced input ignore s input pulses of 100 ns (typical) and is guaranteed to accept input pulses of greater than 1 s. leave floating when not used. 4 v cc monitored supply voltage.
adm6315 rev. e | page 6 of 12 typical performance characteristics 50 45 40 35 30 25 20 15 10 5 0 0 100 200 300 400 500 600 700 800 900 1000 maximum transient duration (s) 00081-012 reset comparator overdrive, (v th ? v cc ) (mv) temperature (c) 10 4 0 ?40 6 2 8 i dd (a) ?20 0 20 40 60 80 100 125 v cc = 5.5v v cc = 3v v cc = 1v 00081-003 figure 4. supply current vs. temperature figure 7. maximum transient duration vs. reset comparator overdrive 0 power-down reset delay (s) 50 100 150 200 250 300 350 400 450 v od = 20mv v od = 125mv v od = 200mv temperature (c) ?40 ?20 0 20 40 60 80 100 125 00081-004 normalized reset threshold (v) 0.995 1.000 1.005 0.990 temperature (c) ?40 ?20 0 20 40 60 80 100 125 00081-007 figure 8. normalized reset threshold vs. temperature (v cc falling) figure 5. power-down reset delay vs. temperature supply voltage (v) 0 supply current (a) 2 12 4 6 8 10 +85c +25c ?40c 0 1 2 3 4 5 0 0081-008 0.94 normalized reset timeout period (ms) 0.96 0.98 1.00 1.02 1.04 1.06 temperature (c) ?40 ?20 0 20 40 60 80 100 125 0 0081-005 figure 6. normalized reset timeout period vs. temperature (v cc rising) figure 9. supply current vs. supply voltage
adm6315 rev. e | page 7 of 12 theory of operation manual reset input interfacing to output of other devices the adm6315 also provides an additional input, mr . this input can be used either as a means for the system operator to reset the system manually via a switch or for a digital circuit to reset the system. the adm6315 series is designed to integrate with as many devices as possible. one feature of the adm6315 is the reset open- drain output, which can sink current from sources with a voltage greater than the v cc of the adm6315 input, making it suitable for use in more diverse applications. mr the input (typically) ignores negative-going pulses that are faster than 100 ns, and it is guaranteed to accept any negative- going input pulse of a duration greater than or equal to 1 s. if benefits of a very accurate reset threshold because the adm6315 series can operate effectively even when there are large degradations of the supply voltages (due to an accurate internal voltage reference circuit), the possibility of a malfunction during a power failure is greatly reduced. mr is connected to long cables or is used in a noisy environment, placing a 1 f decoupling capacitor between the mr input and ground further improves the glitch immunity of the adm6315. v cc trip point (max) v cc trip point v cc v cc trip point (min) reset reset active timeout 00081-010 reset vol v cc trip point (max) v cc trip point v cc to reset delay v cc v cc trip point (min) 00081-009 figure 10. v cc power-down/brownout timing diagram figure 11. v cc power-up timing diagram detailed description transient immunity the adm6315 is designed to protect the integrity of a systems operation by ensuring the proper operation of the system during power-up, power-down, and brownout conditions. as well as being an accurate reset circuit, the adm6315 has good immunity from negative-going transients (see figure 7 ). because of this characteristic, the adm6315 is suitable for use in noisy environments. reset when the adm6315 is powered up, the output of the adm6315 remains low for a period typically equal to the reset active timeout period. this feature allows adequate time for the system to power up correctly and for the power supply to stabilize before any devices are brought out of reset and allowed to begin executing instructions. initializing a system in this way provides a more reliable startup for microprocessor systems. reset when a brownout condition occurs (assuming v cc is falling at 1 mv/s), the adm6315 produces a reset in 35 s typical. producing a reset this fast means that the entire system can be reset together before any part of the systems voltage falls below its recommended operating voltage. this system reset can avoid dangerous and/or erroneous operation of a microprocessor- based system. figure 7 shows the comparator overdrive (the maximum magnitude of negative-going pulses with respect to the typical reset threshold) vs. the pulse duration without a reset.
adm6315 rev. e | page 8 of 12 outline dimensions compliant to jedec standards to-253-aa 073105-a 0.89 0.76 seating plane 0.50 0.30 0.100 0.013 3.04 2.90 2.80 1.07 0.90 0.75 1.92 bsc 0.20 bsc 0.54 ref 12 3 4 1.40 1.30 1.20 2.64 2.10 8 0 0.60 0.50 0.40 0.20 0.08 1.22 0.80 figure 12. 4-lead small outline transistor package [sot-143] (ra-4) dimensions shown in millimeters ordering guide temperature range package option trip point minimum timeout (ms) model package description branding ADM6315-46D1ARTRL7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.63 1 mdv adm6315-46d1art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.63 1 mdv ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.63 1 m9q adm6315-46d1artzr7 1 adm6315-45d1artrl7 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.50 1 mdu adm6315-45d1art-rl ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.50 1 mdu adm6315-45d1artzr7 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.50 1 m81 1 adm6315-44d1artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.39 1 mdt adm6315-44d1art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.39 1 mdt adm6315-31d1artrl7 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 1 mdg adm6315-31d1art-rl ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 1 mdg ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 1 m7x adm6315-31d1artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 1 m7x adm6315-31d1artzrl 1 adm6315-29d1artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.93 1 mdc adm6315-29d1art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.93 1 mdc ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.93 1 m7t adm6315-29d1artzr7 1 adm6315-26d1artrl7 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.63 1 mdb adm6315-26d1art-rl ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.63 1 mdb ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.63 1 mdb# adm6315-26d1artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.63 1 mdb# adm6315-26d1artzrl 1 adm6315-46d2artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.63 20 mev adm6315-46d2art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.63 20 mev ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.63 20 m83 adm6315-46d2artzr7 1 adm6315-45d2artrl7 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.50 20 meu adm6315-45d2art-rl C40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.50 20 meu C40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.50 20 ma8 adm6315-45d2artzr7 1 adm6315-44d2artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.39 20 met adm6315-44d2art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.39 20 met ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.39 20 m80 adm6315-44d2artzr7 1
adm6315 rev. e | page 9 of 12 model temperature range package description package option trip point minimum timeout (ms) branding adm6315-31d2artrl7 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 20 meg adm6315-31d2art-rl ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 20 meg adm6315-31d2artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 20 m7y adm6315-31d2artzrl 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 20 m7y adm6315-29d2artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.93 20 mec adm6315-29d2art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.93 20 mec adm6315-29d2artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.93 20 m7u adm6315-26d2artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.63 20 meb adm6315-26d2art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.63 20 meb adm6315-26d2artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.63 20 meb# adm6315-26d2artzrl 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.63 20 meb# adm6315-46d3artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.63 140 mfv adm6315-46d3art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.63 140 mfv adm6315-46d3artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.63 140 m84 adm6315-45d3artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.50 140 mfu adm6315-45d3art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.50 140 mfu adm6315-45d3artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.50 140 m82 adm6315-44d3artrl7 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.39 140 mft adm6315-44d3art-rl ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.39 140 mft adm6315-44d3artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.39 140 mft# adm6315-44d3artzrl 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.39 140 mft# adm6315-31d3artrl7 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 140 mfg adm6315-31d3art-rl ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 140 mfg adm6315-31d3artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 140 m4g adm6315-31d3artzrl 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 140 m4g adm6315-29d3artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.93 140 mfc adm6315-29d3art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.93 140 mfc adm6315-29d3artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.93 140 m7v adm6315-26d3artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.63 140 mfb adm6315-26d3art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.63 140 mfb adm6315-26d3artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.63 140 mfb# adm6315-26d3artzrl 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.63 140 mfb# adm6315-46d4artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.63 1120 mgv adm6315-46d4art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.63 1120 mgv adm6315-46d4artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.63 1120 m85 adm6315-45d4artrl7 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.50 1120 mgu adm6315-45d4art-rl ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.50 1120 mgu adm6315-44d4artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.39 1120 mgt adm6315-44d4art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 4.39 1120 mgt adm6315-44d4artzrl 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.39 1120 m9h adm6315-44d4artzrl 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 4.39 1120 m9h adm6315-31d4artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 3.08 1120 mgg adm6315-31d4art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 3.08 1120 mgg adm6315-31d4artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 3.08 1120 m7z adm6315-29d4artrl7 ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.93 1120 mgc adm6315-29d4art-rl ?40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.93 1120 mgc adm6315-29d4artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.93 1120 m7w adm6315-26d4artrl7 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.63 1120 mgb adm6315-26d4art-rl C40c to +125c 4-lead smal l outline transistor [sot-143] ra-4 2.63 1120 mgb adm6315-26d4artzr7 1 ?40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.63 1120 mgb# adm6315-26d4artzrl 1 C40c to +125c 4-lead small outline transistor [sot-143] ra-4 2.63 1120 mgb# 1 z = rohs-compliant part, # denotes lead-free product may be top or bottom marked.
adm6315 rev. e | page 10 of 12 notes
adm6315 rev. e | page 11 of 12 notes
adm6315 rev. e | page 12 of 12 notes ?1999C2007 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d00081-0-9/07(e)

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