View MIC2787-XFYMT_3359744.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

mic2786/mic2787 push-button reset ic with voltage supervisor mlf and micro leadframe are registered trademarks of amkor technologies, inc. micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com october 2011 m9999-102711-a general description the mic2786/mic2787 are low-current, ultra-small, push- button supervisor reset ics with an integrated supply voltage monitor. the device features two manual reset inputs and two reset outputs. the reset outputs are asserted and held when the supply voltage decreases below the factory programmed threshold voltage. reset will be asserted for the reset timeout delay once the supply voltage increases above the rising threshold voltage or when both manual reset inputs are asserted low for longer than the setup delay time. the mic2786 features integr ated pull-up resistors on the /mr0 and /mr1 inputs, while the mic2787 requires external pull-up resistors. the pdy input pin selects between a 2s, 4s or 6s setup period. factory-programmed reset timeout delays of 140ms (min.) and 240ms (min.) are available. an active-low, open-drain reset output (/rst) and an active-high, push-pull reset output (rstp) provide flexibility when interfacing to various microcontrollers, pmics, or load switches. the mic2786/mic2787 consum e a quiescent current of only 7.4a and are offered in a tiny, space saving 8-pin thin mlf ? (2mm x 2mm x 0.55mm) package. data sheets and support documentation can be found on micrel?s web site at: www.micrel.com . features ? 1.6v to 5.5v operating voltage ? 7.4a supply current when /mr0, /mr1 not asserted ? 1.66v to 4.63v preset voltage threshold options ? 2.5% voltage threshold a ccuracy over temperature ? asserting /mr0 and /mr1 for the setup delay time asserts reset output for the reset timeout delay ? programmable delay (pdy) input selects 2s, 4s or 6s setup delay ? factory-programmed 140ms (min.) or 240ms (min.) reset timeout delay ? integrated /mr0, /mr1 pu ll-up resistors (mic2786) ? dual reset outputs: ? open-drain, active-low reset output (/rst) ? push-pull, active-high reset output (rstp) ? ? 40c to +85c ambient operating temperature range ? 8-pin 2mm x 2mm x 0.55mm thin mlf ? package applications ? smart phones ? tablets ? set-top boxes (stb) _________________________________________________________________________________________________________________________ typical application
micrel, inc. mic2786/87 october 2011 2 m9999-102711-a ordering information (1) part number marking minimum t reset (ms) nominal threshold voltage package (3,4) integrated pull-up resistors mic2786-xaymt 6xa 140 4.625 8-pin (2mm 2mm) thin mlf ? yes mic2786-yaymt (2) 6ya 240 4.625 8-pin (2mm 2mm) thin mlf ? yes mic2786-xbymt (2) 6xb 140 4.375 8-pin (2mm 2mm) thin mlf ? yes mic2786- ybymt (2) 6yb 240 4.375 8-pin (2mm 2mm) thin mlf ? yes mic2786- xcymt (2) 6xc 140 3.075 8-pin (2mm 2mm) thin mlf ? yes mic2786-ycymt (2) 6yc 240 3.075 8-pin (2mm 2mm) thin mlf ? yes mic2786-xdymt (2) 6xd 140 2.925 8-pin (2mm 2mm) thin mlf ? yes mic2786-ydymt (2) 6yd 240 2.925 8-pin (2mm 2mm) thin mlf ? yes mic2786-xeymt (2) 6xe 140 2.625 8-pin (2mm 2mm) thin mlf ? yes mic2786-yeymt (2) 6ye 240 2.625 8-pin (2mm 2mm) thin mlf ? yes mic2786-xfymt (2) 6xf 140 2.313 8-pin (2mm 2mm) thin mlf ? yes mic2786-yfymt (2) 6yf 240 2.313 8-pin (2mm 2mm) thin mlf ? yes mic2786-xgymt (2) 6xg 140 2.188 8-pin (2mm 2mm) thin mlf ? yes mic2786-ygymt (2) 6yg 240 2.188 8-pin (2mm 2mm) thin mlf ? yes mic2786-xhymt (2) 6xh 140 1.665 8-pin (2mm 2mm) thin mlf ? yes mic2786-yhymt (2) 6yh 240 1.665 8-pin (2mm 2mm) thin mlf ? yes mic2787-xaymt (2) 7xa 140 4.625 8-pin (2mm 2mm) thin mlf ? no mic2787-yaymt (2) 7ya 240 4.625 8-pin (2mm 2mm) thin mlf ? no mic2787-xbymt (2) 7xb 140 4.375 8-pin (2mm 2mm) thin mlf ? no mic2787-ybymt (2) 7yb 240 4.375 8-pin (2mm 2mm) thin mlf ? no mic2787-xcymt (2) 7xc 140 3.075 8-pin (2mm 2mm) thin mlf ? no mic2787-ycymt (2) 7yc 240 3.075 8-pin (2mm 2mm) thin mlf ? no mic2787-xdymt 7xd 140 2.925 8-pin (2mm 2mm) thin mlf ? no mic2787-ydymt (2) 7yd 240 2.925 8-pin (2mm 2mm) thin mlf ? no mic2787-xeymt (2) 7xe 140 2.625 8-pin (2mm 2mm) thin mlf ? no mic2787-yeymt (2) 7ye 240 2.625 8-pin (2mm 2mm) thin mlf ? no MIC2787-XFYMT (2) 7xf 140 2.313 8-pin (2mm 2mm) thin mlf ? no mic2787-yfymt (2) 7yf 240 2.313 8-pin (2mm 2mm) thin mlf ? no mic2787-xgymt (2) 7xg 140 2.188 8-pin (2mm 2mm) thin mlf ? no mic2787-ygymt (2) 7yg 240 2.188 8-pin (2mm 2mm) thin mlf ? no mic2787-xhymt (2) 7xh 140 1.665 8-pin (2mm 2mm) thin mlf ? no mic2787-yhymt (2) 7yh 240 1.665 8-pin (2mm 2mm) thin mlf ? no notes: 1. all devices available in tape and reel only. 2. contact factory for availability. 3. thin mlf ? = pin 1 identifier. 4. thin mlf ? is a green rohs-compliant package. lead fini sh is nipdau. mold compound is halogen free.
micrel, inc. mic2786/mic2787 october 2011 3 m9999-102711-a pin configuration mic2786/mic2787 8-pin (2mm 2mm) thin mlf ? top view pin description pin number pin name pin function 1 rstp active-high push-pull reset output. this output c hanges from low-to-high when vin drops below the selected reset threshold or both manual reset pins are pulled low for the setup delay period. rstp remains high for the reset timeout delay after vin ex ceeds the reset threshold plus hysteresis voltage or the setup delay period has elapsed. 2 gnd supply ground. 3 /mr1 active-low manual reset input. the mic2786 has an internal 65k ? pull-up resistor to vin, while the mic2787 requires an external pull-up resistor to vi n if used with a push button. pull this pin low to assert and force a reset. pulling both manual reset inputs low for the setup delay time causes one reset output pulse for the reset timeout delay period. connect to vin if unused, do not leave floating. 4 /rst active-low open-drain reset output. this output changes from high-to-low when vin drops below the selected reset threshold or both manual reset pi ns are pulled low for the setup delay period. /rst remains low for the reset timeout delay after vin ex ceeds the reset threshold or the setup delay has elapsed and it requires an external pull-up resistor. 5 pdy programmable delay input with tri-state connec tion. when left open, setup delay is 2s, when connected to gnd, setup delay is 4s and when connected to vin, setup delay is 6s. 6 nc no connect. leave pin floating. 7 /mr0 active low manual reset input. the mic2786 has an internal 65k ? pull-up resistor to vin, while the mic2787 requires an external pull-up resistor to vi n if used with a push button. pull this pin low to assert and force a reset. pulling both manual reset inputs low for the setup delay time causes one reset output pulse for the reset timeout delay period. if unused, connect to vin; do not leave floating. 8 vin supply voltage pin. it is the input to the supply voltage monitor. when the supply voltage falls below the reset threshold voltage, reset outputs (/rs t and rstp) are triggered immediately. when the supply voltage rises above the reset threshold plus hysteresis voltage, the reset outputs remain asserted for the duration of the reset timeout delay. a minimum 0.1 f decoupling ceramic capacitor must be connected between vin and gnd close to the pins. epad epad exposed pad. connect to gnd.
micrel, inc. mic2786/mic2787 october 2011 4 m9999-102711-a absolute maximum ratings (1) supply voltage (v in ) ..................................... ? 0.3v to + 6.0v reset input voltage (/mr0, /mr1). ......... ? 0.3v to v in +0.3v open drain reset output (/rst) ................. ? 0.3v to + 6.0v push-pull reset output (rstp).............. ? 0.3v to v in +0.3v tri-state programmable delay (pdy)..... ? 0.3v to v in +0.3v lead temperature (soldering, 10s )............................ 260c junction temperature (t j ) ........................ ? 40c to +150c storage temper ature (ts)......................... ? 55c to + 150c esd rating (human body model) (3) .............................. 2kv esd rating (machine model) (3) ...................................300v operating ratings (2) supply voltage (v in )..................................... +1.6v to +5.5v reset input voltage (/mr 0, /mr1)......................... 0v to v in open drain reset output (/rst)...................... 0v to +5.5v push-pull reset output (rstp) ............................ 0v to v in tri-state programmable de lay (pdy).................... 0v to v in ambient temperature (t a ) .......................... ? 40c to +85c junction thermal resistance 2mm 2mm thin mlf ? ( ja ).............................90c/w electrical characteristics (4) v in = 3.0v, t a = 25 c, bold values indicate ? 40c t a +85 c; unless noted otherwise. parameter conditions min. typ. max. units power supply input supply voltage (v in ) 1.6 5.5 v v in = 5v; /mr0, /mr1, /rst, rstp, and pdy open 7.9 12.5 supply current (i vin ) v in = 3v; /mr0, /mr1, /rst, rstp, and pdy open 7.4 a reset threshold voltage a (falling) t a = 25 c 4.533 4.625 4.718 a (falling) ? 40 c t a +85 c 4.509 4.625 4.741 b (falling) t a = 25 c 4.288 4.375 4.463 b (falling) ?40 c t a +85 c 4.266 4.375 4.484 c (falling) t a = 25 c 3.014 3.075 3.137 c (falling) ?40 c t a +85 c 2.998 3.075 3.152 d (falling) t a = 25 c 2.867 2.925 2.984 d (falling) ?40 c t a +85 c 2.852 2.925 2.998 e (falling) t a = 25 c 2.573 2.625 2.678 e (falling) ?40 c t a +85 c 2.559 2.625 2.691 f (falling) t a = 25 c 2.267 2.313 2.359 f (falling) ?40 c t a +85 c 2.255 2.313 2.371 g (falling) t a = 25 c 2.144 2.188 2.232 g (falling) ?40 c t a +85 c 2.133 2.188 2.243 h (falling) t a = 25 c 1.632 1.665 1.698 reset threshold voltage (v th ) h (falling) ?40 c t a +85 c 1.623 1.665 1.707 v
micrel, inc. mic2786/mic2787 october 2011 5 m9999-102711-a electrical characteristics (4) (continued) v in = 3.0v, t a = 25 c, bold values indicate ? 40c t a +85 c; unless noted otherwise. parameter conditions min. typ. max. units hysteresis voltage (v hyst ) a, b 0.5 % hysteresis voltage (v hyst ) c, d, e, f, g, h 1.0 % reset time pdy = open 1.6 2.0 2.4 s pdy = 0v 3.2 4.0 4.8 s setup delay (t setup ) pdy = v in 4.8 6.0 7.2 s option x 140 220 280 ms reset timeout delay (t reset ) option y 240 350 480 ms reset outputs (/rst, rstp) v in = 4.5v, i sink = 3.2ma 0.3 v in = 3.3v, i sink = 2.5ma 0.3 reset output voltage low (/rst output and rstp output) (v ol ) v in = 1.6v, i sink = 1.0ma 0.3 v v in = 4.5v, i source = 0.8ma 0.8 v in v in = 2.7v, i source = 0.5ma 0.8 v in reset output voltage high (rstp output) (v oh ) v in = 1.6v, i source = 250 a 0.8 v in v /rst output leakage (i lo ) v /rst = 5.5v 0.3 a manual reset inputs (/mr0, /mr1) input high voltage (v ih ) 1.2 v input low voltage (v il ) 0.3 v internal pull-up resistor (r pu ) mic2786 only 65 k? leakage current /mr0, /mr1 pin (i mr ) /mr0, /mr1 inputs; mic2787 only ? 1.0 1.0 a programmable setup delay input (pdy) pdy = v in , /mr0 = /mr1 = 0v +60 a pdy = v in , /mr0 = v in or /mr1= v in 100 na pdy = 0v, /mr0 = /mr1 = 0v -60 a input bias current pdy pin (i pdy ) pdy = 0v, /mr0 = v in or /mr1 = v in 100 na notes: 1. exceeding the absolute maximum rating may damage the device. 2. the device is not guaranteed to function outside its operating rating. 3. devices are esd sensitive. handling pr ecautions recommended. human body model, 1.5k ? in series with 100pf. 4. specification for packaged product only.
micrel, inc. mic2786/mic2787 october 2011 6 m9999-102711-a typical characteristics v in supply current vs. temperature (pdy = open) 5.0 5.8 6.6 7.4 8.2 9.0 -40 -15 10 35 60 85 temperature (c) supply current (a) v in = 3.0v pdy = open setup delay vs. temperature (pdy = open) 1.0 1.5 2.0 2.5 3.0 -40 -15 10 35 60 85 temperature (c) dual reset delay (s) v in = 3.0v pdy = open reset timeout delay (option x ) vs. temperature (pdy = open) 200 210 220 230 240 250 -40 -15 10 35 60 85 temperature (c) reset timeout delay (ms) v in = 3.0v pdy = open v in supply current vs. temperature (pdy = 0v) 5.0 5.8 6.6 7.4 8.2 9.0 -40 -15 10 35 60 85 temperature (c) supply current (a) v in = 3.0v pdy = 0v setup delay vs. temperature (pdy = 0v) 3.0 3.5 4.0 4.5 5.0 -40 -15 10 35 60 85 temperature (c) dual reset delay (s) v in = 3.0v pdy = 0v reset timeout delay (option x ) vs. temperature (pdy = 0v) 200 210 220 230 240 250 -40 -15 10 35 60 85 temperature (c) reset timeout delay (ms) v in = 3.0v pdy = 0v v in supply current vs. temperature (pdy = v in ) 5.0 5.8 6.6 7.4 8.2 9.0 -40 -15 10 35 60 85 temperature (c) supply current (a) v in = 3.0v pdy = v in setup delay vs. temperature (pdy = v in ) 5.0 5.5 6.0 6.5 7.0 -40 -15 10 35 60 85 temperature (c) dual reset delay (s) v in = 3.0v pdy = v in reset timeout delay (option x ) vs. temperature (pdy = v in ) 200 210 220 230 240 250 -40 -15 10 35 60 85 temperature (c) reset timeout delay(ms) v in = 3.0v pdy = v in
micrel, inc. mic2786/mic2787 october 2011 7 m9999-102711-a typical characteristics (continued) v in supply current vs. input voltage 5.8 6.6 7.4 8.2 9.0 9.8 0123456 input voltage (v) supply current (a) /mr0 = not asserted /mr1 = not asserted setup delay vs. input voltage 0.0 2.0 4.0 6.0 8.0 10.0 0123456 input voltage (v) dual reset delay (s) pdy = 0v pdy = v in pdy = open reset timeout delay (option x ) vs. input voltage 200 210 220 230 240 250 0123456 input voltage (v) reset timeout delay (ms) normalized reset threshold vs. temperature 0.920 0.940 0.960 0.980 1.000 1.020 1.040 1.060 -40 -15 10 35 60 85 temperature (c) reset threshold voltage (v)
micrel, inc. mic2786/mic2787 october 2011 8 m9999-102711-a timing diagram
micrel, inc. mic2786/mic2787 october 2011 9 m9999-102711-a functional diagram
micrel, inc. mic2786/mic2787 october 2011 10 m9999-102711-a application information design and product advantages the mic2786/mic2787 are voltage supervisor reset ics with dual manual reset inputs and long manual reset setup delay times. the dual manual reset inputs and long manual reset setup delay times help protect against accidental system resets in applications such as smart phones, personal navigation dev ices, mp3 players, and set-top boxes (stb). the mic2786/mic2787 assert and hold a reset when the supply voltage decreases below the factory-programmed threshold voltage. reset is asserted for a fixed reset timeout delay once the supply voltage increases above the rising threshold voltage or when both manual reset inputs are asserted low for longer than the setup delay time. the mic2786/mic2787 feature manual reset setup delay times of 2s, 4s or 6s, which are selected by the tri- state programmable delay i nput pin (pdy). they are available with factory-programmed reset timeout delays of 140ms (min.) or 240ms (min.). both the mic2786 and mic2787 feature an active-low, open-drain reset output (/rst) and an active-high, push-pull reset output (rstp). this allows flexibility for interfacing with different microprocessors, pmics, and load-switches. the mic2786 features 65k pull-up resistors on the /mr0 and /mr1 inputs to provide ease when connecting to push-button inputs. the mic2787 does not provide pull- up resistors on the manual reset inputs and is intended for directly interfacing to logic outputs. supply bypass capacitor a 0.1f input bypass capacitor must be placed from v in (pin 8) to gnd (pin 2). programmable delay input (pdy) the mic2786/mic2787 has a programmable setup delay time, t setup that is set via a tri-state logic configuration. the pdy pin is intended to be connected to the v in supply voltage, ground or left floating. pdy configuration t setup open 2s gnd 4s v in 6s dual manual reset inputs (/mr0, /mr1) the /mr0, /mr1 input pins have integrated pull-up resistors for the mic2786 but require external pull-up resistors for the mic2787. a recommended value is 100k ? to keep the current consumption low when the push-button switches are pressed. the behavior of the reset outputs is independent of the order in which the /mr0, /mr1 inputs are driven low. if both inputs are low for a setup delay time, only one reset pulse, of width t reset , is generated. keeping both inputs low for a longer time does not generate additional reset output pulses. reset outputs (/rst and rstp) the /rst output is a simple open-drain n-channel mosfet structure that require s a pull-up resistor to an external voltage. for most applications, the pull-up voltage will be the same as the power supply that supplies v in to the mic2786/mic2787. as shown in figure 1, it is possible to tie this resistor to some other voltage, other than v in , thus enabling level-shifting of the /rst output. the pull-up voltage must be limited to 5.5v or less to avoid damage to the mic2786/mic2787. the pull-up resistor must be small enough to supply current to the inputs and leakage paths that are driven by the /rst output (a recommended value is 100k ? ). leave floating if the /rst pin is unused. since the /rst output is open-drain, several reset sources can be wire-ored, in parallel, to allow resets from multiple sources. by tying the pull-up resistor to some other voltage, the mic2786/mic2787 can monitor one voltage while level-shifting the /rst output to some other voltage. the rstp pin is a push-pull output that is driven to v in . it cannot be level-shifted to another voltage. it is an inverted signal of /rst. figure 1. mic2786/mic2787 used in multiple supply system
micrel, inc. mic2786/mic2787 october 2011 11 m9999-102711-a asserting /rst and rstp outputs a) when functioning as a manual reset the reset outputs /rst a nd rstp are asserted when the setup delay time, t setup , is exceeded while the /mr0, /mr1 pins are driven low. both the reset outputs remain asserted for a factory-programmed reset timeout delay time t reset . two options are available with 140ms or 240ms minimum t reset duration. the /rst pin is driven active low while the rstp pin is driven active high for the t reset duration. the reset outputs are undefined for v in < 1.6v. figure 2. manual reset function b) when functioning as a voltage monitor the /rst pin is asserted whenever v in falls below the reset threshold voltage, v th (v in < v th ). the v in pin circuitry includes hysteresis to prevent /rst or rstp pin chattering due to noise. the /rst pin remains asserted for the duration of the reset timeout delay (t reset ) after v in has risen above the reset threshold voltage plus the hysteresis. the reset functi on ensures a mi croprocessor is properly reset and powers up in a known condition after a power failure. /rst remains valid with v in as low as 1.6v. the rstp output is a compliment of the /rst output. figure 3. voltage monitor function v in transients the mic2786/mic2787 is relatively immune to small negative-going v in glitches below the reset threshold. as shown in figure 4, the overdr ive voltage is the difference between the threshold voltage and the minimum point of the v in glitch. typically, an overdrive of 100mv, with duration of 20 s or less will not cause a reset. figure 4. v in transient
micrel, inc. mic2786/mic2787 october 2011 12 m9999-102711-a typical applications figure 5. mic2786/mic2787 used for interrupting system power figure 6. mic2786/mic2787 used for microcontroller reset
micrel, inc. mic2786/mic2787 october 2011 13 m9999-102711-a evaluation board schematic bill of materials item part number manufacturer description qty. c1 grm188r71c104ka01d murata (1) 0.1f, 16v capacitor, x7r, 0603 1 r1, r2, r4 crcw0603100kjnea vishay (2) 100k, 5% resistor, 0603 3 mic2786-xdymt u1 mic2787-xdymt micrel, inc. (3) push-button reset ic with supply voltage supervisor 1 notes: 1. murata tel: www.murata.com . 2. vishay tel: www.vishay.com . 3. micrel, inc.: www.micrel.com .
micrel, inc. mic2786/mic2787 october 2011 14 m9999-102711-a pcb layout recommendations top layer top silkscreen
micrel, inc. mic2786/mic2787 october 2011 15 m9999-102711-a pcb layout recommendations (continued) copper layer bottom silkscreen
micrel, inc. mic2786/mic2787 october 2011 16 m9999-102711-a package information 8-pin 2mm 2mm thin mlf ?
micrel, inc. mic2786/mic2787 october 2011 17 m9999-102711-a recommended landing pattern red circle indicates thermal via. size should be .300mm ? .350mm in diameter and it should be connected to gnd plane for maximum thermal performance. 8-pin 2mm 2mm thin mlf ? micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel +1 (408) 944-0800 fax +1 (408) 474-1000 web http://www.micrel.com micrel makes no representations or warranties with respect to t he accuracy or completeness of the information furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for it s use. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether expre ss, implied, arising by estoppel or other wise, to any intellectual property rights is granted by this document. except as provided in micrel?s terms and conditions of sale for such products, mi crel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/or use of micrel products including l iability or warranties relating to fitness for a particular purpose, merchantability, or infringement of an y patent, copyright or other intellectual p roperty right. micrel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a product can reasonably be expected to result in pers onal injury. life support devices or system s are devices or systems that (a) are in tended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significan t injury to the user. a purchaser?s use or sale of micrel produc ts for use in life support app liances, devices or systems is a purchaser?s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2011 micrel, incorporated.

▲Up To Search▲

Price & Availability of MIC2787-XFYMT

	To Download MIC2787-XFYMT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .