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product structure silicon monolithic integrated circuit this product is not designed for protection against radioactive rays . 1 / 10 tsz02201 - 0r7r0g300020 - 1 - 2 ? 20 1 6 rohm co., ltd. all rights reserved. 21.jun.2016 rev.007 tsz22111 ? 14 ? 001 www.rohm.com voltage detector ic series bipolar voltage detector ics bd47 xx series general description the bd47 xx series is a voltage detector ic , developed to prevent system errors at transient state , when the power of cpu or logic circuit switches on/off or in ca ses of momentary shut d own. these ics consist of three terminals (power supply, gnd and reset output) to detect power supply voltages and outputs reset signals of various systems. these ics are ultra - compact and have low current consumption , making them id eal for portable products. features ? high accuracy detection ? low current consumption ? very small package ? open collector l reset output ? package ssop5 is similar to sot - 23 - 5 (jedec) key specifications ? detection voltage range: 1.9 v to 4.6v (typ.) 0.1v steps ? high accuracy detecti on voltage: 1% ? low current consumption: 1.6a (typ.) ? operating temperature range: - 40c to +75c package ssop5 2.90mm x 2.80mm x 1. 2 5mm applications circuits using microcontrollers or logic circuits that require a reset. typical app lication circuit connection diagram ssop5 top view pin descriptions pin no. symbol function 1 n.c. unconnected terminal 2 sub substrate* 3 gnd gnd 4 v out reset output 5 v dd power supply voltage * sub strate pin should be connected with gnd n.c. sub gnd v out v dd lot. no marking gnd bd47xx series reset gnd v out v dd v dd cpu micro - controller c l r l datashee t
2 / 10 bd47 xx series tsz02201 - 0r7r0g300020 - 1 - 2 ? 20 1 6 rohm co., ltd. all rights reserved. 21.jun.2016 rev.007 www.rohm.com tsz22111 ? 15 ? 001 ordering information lineup marking detection voltage part number marking detection voltage part number marking detection voltage part number b2 4.6v bd4746 br 3.6v bd4736 bh 2.6v bd4726 b1 4.5v bd4745 bq 3.5v bd4735 bg 2.5v bd4725 bz 4.4v bd4744 bp 3.4v bd4734 bf 2.4v bd4724 by 4.3v bd4743 b4 3.3v bd4733 be 2.3v bd4723 bx 4.2v bd4742 bn 3.2v bd4732 bd 2.2v bd4722 bw 4.1v bd4741 bm 3.1v bd4731 bc 2.1v bd4721 bv 4.0v bd4740 bl 3.0v bd4730 bb 2 .0v bd4720 bu 3.9v bd4739 bk 2.9v bd4729 ba 1.9v bd4719 bt 3.8v bd4738 bj 2.8v bd4728 bs 3.7v bd4737 b3 2.7v bd4727 (sot - 23 - 5) b d 4 7 x x g - t r part reset voltage value package packaging and number 19 : 1.9v g : ssop5 forming specification 0.1v step tr : embossed tape 46 : 4.6v and reel
3 / 10 bd47 xx series tsz02201 - 0r7r0g300020 - 1 - 2 ? 20 1 6 rohm co., ltd. all rights reserved. 21.jun.2016 rev.007 www.rohm.com tsz22111 15 001 ? absolute maximum ratings parameter symbol limit unit power supply voltage v dd - 0.3 to +10 v output voltage v out - 0.3 to +10 v output current io 60 ma power dissipation *1 *2 pd 540 mw operation temperature range topt - 40 to +75 c ambient storage t emperature tstg - 55 to +125 c *1 reduced by 5.4mw/ c when used over 25 c. * 2 when mounted on rohm standard circuit board (70mm70mm1.6mm, glass epoxy board). ? electrical characteristics (unless otherwise specified ta=25 c ) parameter symbol condition limit unit min. typ. max. detection voltage v det v dd =h ? l rl=4.7k ? v det (t) 0.99 v det (t) v det (t) 1.01 v vdet=2.5v t a =+25c 2.475 2.5 2.525 ta = - 40c to 7 5c 2.418 - 2.584 vdet=3.0v ta=+25c 2.970 3.0 3.030 ta = - 40c to 7 5 c 2.901 - 3.100 vdet=3.3v ta=+25c 3.267 3.3 3.333 ta = - 40c to 7 5c 3.191 - 3.410 vdet=4.2v ta=+25c 4.158 4.2 4.242 ta= - 40c to 7 5c 4.061 - 4.341 temperature coefficient of detection voltage v det / t r l =4.7k ? ta= - 20 to +75 c designed gu arantee - 0.01 - %/ c detection hysteresis voltage v det r l =4.7k ? , v dd = l ? h ? l 30 50 100 mv transfer delay time a? h a? t plh c l =100pf h r l =4.7k ? *1 - 20 50 s transfer delay time a? l a? t phl c l =100pf h r l =4.7k ? *2 - 60 120 s reset output voltage a? l a? v ol v dd =v de t (min.) - 0.05v, r l =4.7k ? - 0.1 0.4 v circuit current on icc1 v dd =v det (min.) - 0.05v, r l = ? - 1.5 3.0 a circuit current off icc2 v dd =v det (typ.)/0.85v, r l = ? - 1.6 3.2 a operating voltage range v opl r l =4.7k ? h v ol ? 0.4v - 0.65 0.85 v output leak current i leak v dd =v out =10v - - 0.1 a reset output current a? l a? i ol vo=0.4v, v dd =v det (min.) - 0.05v 3.0 15.0 - ma v det (t) : standard detection voltage ( 1.9v to 4.6v, 0.1v step h r h( : pull - up resistor to be connected between v out and power supply. c l : capacitor to be connected b etween v out and gnd. *1 t plh :v dd =(v det (typ.) - 0.4v) ? ( v det (typ.)+0.4v) *2 t phl :v dd =(v det (typ.)+0.4v) ? (v det (typ.) - 0.4v) design guarantee . ( outgoing inspection is not done on all products )
4 / 10 bd47 xx series tsz02201 - 0r7r0g300020 - 1 - 2 ? 20 1 6 rohm co., ltd. all rights reserved. 21.jun.2016 rev.007 www.rohm.com tsz22111 ? 15 ? 001 block diagram fig.1 bd47xx series vref v out v dd gnd 5 4 3
5 / 10 bd47 xx series tsz02201 - 0r7r0g300020 - 1 - 2 ? 20 1 6 rohm co., ltd. all rights reserved. 21.jun.2016 rev.007 www.rohm.com tsz22111 ? 15 ? 001 typical performance curves fig.2 circuit current fig.3 low output current fig.4 i/o characteristics fig.5 operating limit voltage bd4729 bd4729 bd4729 bd4729 0 100 200 300 400 500 600 700 800 0 5 10 15 20 25 30 output voltage v out [mv] "low" output current i ol [ma] bd4729g i ol =12.194ma at vo=400mv 0 1 2 3 4 5 6 0 1 2 3 4 5 6 v dd supply voltage v dd [v] output voltage v out [v] bd4729g v det =2.95v S v det =50mv v det =2.90v 0 100 200 300 400 500 600 700 800 900 1000 0 0.5 1 1.5 2 2.5 v dd supply voltage v dd [v] output voltage v out [mv] bd4729g v opl =0.675v 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 v dd supply voltage v dd [v] circuit current i cc [a] bd4729g icc1=1.34a icc2=1.46 a
6 / 10 bd47 xx series tsz02201 - 0r7r0g300020 - 1 - 2 ? 20 1 6 rohm co., ltd. all rights reserved. 21.jun.2016 rev.007 www.rohm.com tsz22111 ? 15 ? 001 typical pe rformance curves C continued fig.7 circuit current when on fig.8 circuit current when off fig.9 operating l imit voltage fig.6 detection voltage ~ ~ bd4729 bd4729 bd4729 bd4729 0.0 0.5 1.0 1.5 2.0 2.5 -20 -10 0 10 20 30 40 50 60 70 80 temperature ta[ ] circu it c urr ent wh en on i cc1 [ma] bd4729g 0.4 0.5 0.6 0.7 0.8 0.9 -20 -10 0 10 20 30 40 50 60 70 80 temperature ta[ ] minimum operation vo l tage v opl [v] bd4729g 0.0 0.5 1.0 1.5 2.0 2.5 -20 -10 0 10 20 30 40 50 60 70 80 temperature ta[ ] circu it c urr ent wh en off i cc2 [ma] bd4729g 2.3 2.5 2.7 2.9 3.1 3.3 3.5 -20 -10 0 10 20 30 40 50 60 70 80 temperature ta[ ] detection voltage v det [v] bd4729g -0.007%/
7 / 10 bd47 xx series tsz02201 - 0r7r0g300020 - 1 - 2 ? 20 1 6 rohm co., ltd. all rights reserved. 21.jun.2016 rev.007 www.rohm.com tsz22111 ? 15 ? 001 typical performance curves C continued fig.10 output saturation voltage bd4729 0 100 200 300 400 500 0 1 2 3 4 5 "low" output current i ol [ma] output voltage v out [mv] bd4729g ta=25 ta=75 ta=-20
8 / 10 bd47 xx series tsz02201 - 0r7r0g300020 - 1 - 2 ? 20 1 6 rohm co., ltd. all rights reserved. 21.jun.2016 rev.007 www.rohm.com tsz22111 ? 15 ? 001 application information explanation of operation bd47 xx series has threshold voltages namely the detection voltage and release voltage . as the voltages applied to the input reach their respective threshold s , the output switches from high to low and from low to high. the release voltage has a hysteresis that is the value of the detection voltage +50mv (typ.), preventing chattering in the output. when the input is grea ter than the release voltage, the output is in a high state. when the input decreases from that state, the output switches to low up on reaching the detection voltage. when the input is less than the detection voltage, the output is in a low state. wh en the input increases from that state, the output switches to high upon reaching the release voltage. additionally, at least 0.85v input voltage is required for the circuit to function as expected . when the input falls below the operating limit voltage, the output becomes unstable . when the power supply is turned on, the output is still unstable until it reaches the operating limit voltage (v opl ) with a given time t phl . therefore it is possible that the reset signal is not outputted when the rise time of v dd is faster than t phl . when v dd is greater than v opl but less th an the reset release voltage (v det + v det ), the output voltages will switch to low. if v dd ex ceeds the reset release voltage ( v det +v det ) then v out switches from l to h after t plh . if v dd drops below the detection voltage (v det ) when the power supply is powered down or when there is a power supply fluctuation, v out switche s to l (with a delay of t phl ). the potential difference between the detection voltage and the release voltage is known as the hysteresis width (v det ). the system is designed such that , the output does not toggle with power supply fluctuations within this hysteresis width, malfunctions due to noise are prevented . please be aware that when there is resistance on the power supply line, the detection voltage varies with voltage drops caused by the ic current consumption. please connect a capacitor between v dd and gnd when the power supply line has high impedance. fig.11 timing waveform 3 4 5 v dd v det + v det v det v opl 0v t phl v out t plh t phl t plh v ol v oh v dd 2 1
9 / 10 bd47 xx series tsz02201 - 0r7r0g300020 - 1 - 2 ? 20 1 6 rohm co., ltd. all rights reserved. 21.jun.2016 rev.007 www.rohm.com tsz22111 ? 15 ? 001 circuit applications the following is an example of an application circuit using reset ic for normal power supply detection. bd47 xx series requires a pull up resistor on the output terminal. the pull up resistor value should be decided depending on th e application , with enough consideration of power supply level and output current capability. when a capacitor is placed at the output terminal , to delay the output time or to remove noise, the output will be come slower during starting or stopping. please be careful in considering the appropriate value for pull up resistors , output current , and capacitor when inserting a bypass capacitor between input and gnd. please be aware that if an extremely large capacitor is used, the response time will become excess ively slow. fig.12 circuit applications vref v out v dd gnd 5 4 3 bd47xx series v dd reset pin microcontroller
10 / 10 bd47 xx series tsz02201 - 0r7r0g300020 - 1 - 2 ? 20 1 6 rohm co., ltd. all rights reserved. 21.jun.2016 rev.007 www.rohm.com tsz22111 ? 15 ? 001 operational notes 1) absolute m aximum r atings operating the ic over the absolute maximum ratings may damage the ic. the damage can either be a short circuit between pins or an open circuit between pins. therefore, it is impor tant to consider circuit protection measures, such as adding a fuse, in case the ic is operated over the absolute maximum ratings. 2) ground voltage the voltage of the ground pin must be the lowest voltage of all pins of the ic at all operating conditions. e nsure that no pins are at a voltage below the ground pin at any time, even during transient condition. 3) recommended operating c onditions these conditions represent a range within which the expected characteristics of the ic can be approximately obtained . t he e lectrical characteristics are guaranteed under the conditions of each parameter . 4) bypass capacitor for noise rejection to help reject noise, put a 1 f capacitor between v dd pin and gnd and 1000pf capacitor between v out pin and gnd. be careful when usin g extremely big capacitor as transient response will be affected. 5) short between pins and mounting errors be careful when mounting the ic on printed circuit boards. the ic may be damaged if it is mounted in a wrong orientation or if pins are shorted togeth er . s hort circuit may be caused by conductive particles caught between the pins. 6) operation under strong electromagnetic field operating the ic in the presence of a strong electromagnetic field may cause the ic to malfunction . 7) the v dd line impedance might cause oscillation because of the detection current. 8) a v dd to gnd capacitor (as close connection as possible) should be used in high v dd line impedance condition. 9) lower than the mininum input voltage puts the v out in high impedance state, and it must be v dd in pull up ( v dd ) condition. 10) external parameters the recommended parameter range for r l is 2 k to 1m. there are many factors (board layout, etc) that can affect characteristics. please verify and confirm using practical applications. 11) power on reset operation please note that the power on reset output varies with the v dd rise time. please verify the behavior in the actual operation. 12) testing on application boards when testing the ic on an application board, connecting a capacitor directly to a low - imp edance output pin may subject the ic to stress. always discharge capacitors completely after each process or step. the ics power supply should always be turned off completely before connecting or removing it from the test setup during the inspection proce ss. to prevent damage from static discharge, ground the ic during assembly and use similar precautions during transport and storage. 13) rush current when power is first supplied to the ic, rush current may flow instantaneously. it is possible that the charg e current to the parasitic capacitance of internal photo diode or the internal logic may be unstable. therefore, give special consideration to power coupling capacitance, power wiring, width of gnd wiring, and routing of connections.
notice - p ga - e rev.00 3 ? 201 5 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our p roducts are designed and manufactured for application in ordinary electronic equipment s ( such as av equipment, oa equipment, telecommunication equipment, home elec tronic appliances, amusement equipment, etc.). if you intend to use our products in devices requiring extremely high reliability ( such as medical equipment ( n ote 1 ) , transport equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, f uel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life , bodily injury or serious damage to property ( specific applications ) , please consult with the rohm sales represe ntative in advance. unless otherwise agreed in writing by rohm in advance, rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any rohm s products for specific appl ications. ( n ote1) m edical e quipment c lassification of the s pecific applications japan usa eu china class 2. rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsi bilities, adequate safety measures including but not limited to fail - safe design against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our p roducts are designed and manufactured for use under standard conditions a nd not under any special or extraordinary environments or conditions, as exemplified below . accordingly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any rohms p roduct s under any special or extraordinary environments or conditions . if you intend to use our products under any special or extraordinary environments or conditions (as exemplified below), your independent v erification and confirmation of product performance, reliability, etc, pri or to use, must be necessary : [a] use of our products in any types of liquid, including water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the p roducts are exposed to direct sunlight or dust [c] use of our prod ucts in places where the p roducts are exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the p roducts are exposed to static electricity or electromagnetic waves [e] use of our products in p roximity to heat - producing components, plastic cords, or other flammable items [f] s ealing or coating our p roducts with resin or other coating materials [g] use of our products without cleaning residue of flux (even if you use no - clean type fluxes, cleanin g residue of flux is recommended); or washing our products by using water or water - soluble cleaning agents for cleaning residue after soldering [h] use of the p roducts in places subject to dew condensation 4 . the p roducts are not subject to radiation - proo f design . 5 . please verify and confirm characteristics of the final or mounted products in using the products. 6 . in particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied, confirmation of pe rformance characteristics after on - board mounting is strongly recommended. avoid applying power exceeding normal rated power; exceeding the power rating under steady - state loading condition may negatively affect product performance and reliability. 7 . de - rate power dissipation d epending on a mbient temperature . when used in sealed area, confirm that it is the use in the range that does not exceed the maximum junction temperature. 8 . confirm that operation temperature is within the specified range described in the product specification. 9 . rohm shall not be in any way responsible or liable for f ailure induced under devian t condition from what is defined in this document . precaution for mounting / circuit board design 1. when a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be used on a surface - mount products, the flow soldering method must be used on a through hole mount products. i f the flow soldering method is preferred on a surface - mount products , please consult with the roh m representative in advance. for details , please refer to rohm mounting specification
notice - p ga - e rev.00 3 ? 201 5 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, please allow a sufficient margin considerin g variations of the characteristics of the p roducts and external components, including transient characteristics, as well as static characteristics. 2. you agree that application notes, reference designs, and associated data and information contained in t his document are presented only as guidance for products use . therefore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in t his document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this p roduct is e lectrostatic sensitive product, which may be damaged due to e lectrostatic discharge. please take proper caution in your manufacturing process and stor age so that voltage exceeding the product s maximum rating will not be applied to p roducts. please take special care under dry condition (e .g. grounding of human body / equipment / solder iron, isolation from charged objects, setting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriorate if the p roducts are stored in the places where : [a] the p roducts are exposed to sea winds or corrosive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to direct sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage condition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm solderability before using p roducts of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the correct direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excess ive stress applied when dropping of a carton. 4. use p roducts within the specified time after opening a humidity barrier bag. baking is required before using p roducts of which storage time is exceeding the recommended storage time period . precaution for p roduct l abel a two - dimensional barcode printed on rohm p roduct s label is for rohm s internal use only . precaution for d isposition when disposing p roducts please dispose them properly using a n authorized industry waste company. precaution for foreign e xchange and foreign t rade act since concerned goods might be fallen under listed items of export control prescribed by foreign exchange and foreign trade act, please consult with rohm in case of export. precaution regarding intellectual property rights 1. all information an d data including but not limited to application example contained in this document is for reference only. rohm does not warrant that foregoing information or data will not infringe any intellectual property rights or any other rights of any third party reg arding such information or data. 2. rohm shall not have any obligations where the claims, actions or demands arising from the combination of the products with other articles such as components, circuits, systems or external equipment (including software). 3. no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the products or the information contained in this document. provided, however, that rohm will not assert it s intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the products, subject to the terms and conditions herein. other precaution 1. this document may not be reprinted or reproduced, in whole or in part, without prior written consent of rohm. 2. the products may not be disassemble d, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. i n no event shall you use in any way whatso ever the products and the related technical information contained in the products or this document for any military purposes , including but not limited to, the development of mass - destruction weapons . 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties.
datasheet datasheet notice ? we rev.001 ? 2015 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information.
datasheet part number bd4719g package ssop5 unit quantity 3000 minimum package quantity 3000 packing type taping constitution materials list inquiry rohs yes bd4719g - web page distribution inventory

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