View BU4944G-TR_8888621.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

product structure silicon monolithic integrated circuit this product is not designed for protection against radioactive rays . 1/ 15 tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 tsz22111 ? 14 ? 001 www.r ohm.com voltage detector ic series low voltage standard cmos voltage detector ics bu48 xx s eries bu49 xx s eries general description rohm standard cmos reset ic series is a high - accuracy , low current consumption reset ic series. the lineup was established with t wo output types (nch open drain and cmos output) and detection voltage range from 0.9v to 4.8v in increments of 0.1v, so that the series may be selected according to the application at hand. features ? ultra - low current consumption ? high accuracy detection , ultra - low voltage detection ? two output types (nch open drain and cmos output) ? wide operating temperature range ? very small and low height package ? package ssop5 and sop4 is similar to sot -23- 5 and sc - 82 respectively (jedec) key specifications ? detection vo ltage: 0.9v to 4.8v 0.1v steps ? high accuracy detection voltage: 1.0% ? ultra - low current consumption: 0.55a (typ.) ? operating temperature range: - 40c to +125c package ssop5 2.90mm x 2.80mm x 1. 2 5m m sop4 2.00mm x 2.10mm x 0.95mm vsof5 1.60mm x 1.60mm x 0.60mm applications all electronic devices that use micro controllers and logic circuits typical application circuit open drain output type bu48 xx series cmos output type bu49 xx series datashee t v dd1 bu48 xx v dd2 gnd c l (capacitor for noise filtering) r l c in r st micro controller v dd1 bu49 xx c in gnd c l (capacitor for noise filtering) r st micro controller
2 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 ? connection diagram & pin descriptions ssop5 sop4 top view top view vsof5 top view ? ordering information pin no. symbol function pin no. symbol function 1 v out reset output 1 v out reset output 2 v dd power supply voltage 2 v dd power supply voltage 3 gnd gnd 3 n.c. unconn ected terminal 4 n.c. unconnected terminal 4 gnd gnd 5 n.c. unconnected terminal pin no. symbol function 1 v out reset output 2 sub substrate* 3 n.c. unconnected ter minal 4 v dd power supply voltage 5 gnd gnd *connect the substrate to v dd v dd v out sub n.c . gnd 4 3 2 1 5 marking lot. no v out v dd n.c. gnd 1 2 3 4 marking lot. no v out v dd gnd n.c. n.c. lot. no marking b u x x x x x - t r part output type reset voltage value package packaging and number 48 : open drain 09 : 0.9v g : ssop5 forming specification 49 : cmos 0.1v step f : sop4 tr : embossed tape 48 : 4.8v fve : vsof5 and reel
3 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 ? lineup output type open drain cmos detection voltage marking part number marking part number 4.8v jr bu4848 lh bu4948 4.7v jq bu4847 lg bu4947 4.6v jp bu4846 lf bu4946 4.5v jn bu4845 le bu4945 4.4v jm bu4844 ld bu4944 4.3v jl bu4843 lc bu4943 4.2v jk bu4842 lb bu4942 4.1v jj bu4841 la bu4941 4.0v jh bu4840 kz bu4940 3.9v jg bu4839 ky bu4939 3.8v jf bu4838 kx bu4938 3.7v je bu4837 kw bu4937 3.6v jd bu4836 kv bu4936 3.5v j c bu4835 ku bu4935 3.4v jb bu4834 kt bu4934 3.3v ja bu4833 ks bu4933 3.2v hz bu4832 kr bu4932 3.1v hy bu4831 kq bu4931 3.0v hx bu4830 kp bu4930 2.9v hw bu4829 kn bu4929 2.8v hv bu4828 km bu4928 2.7v hu bu4827 kl bu4927 2.6v ht bu4826 kk bu4926 2.5v hs bu4825 kj bu4925 2.4v hr bu4824 kh bu4924 2.3v hq bu4823 kg bu4923 2.2v hp bu4822 kf bu4922 2.1v hn bu4821 ke bu4921 2.0v hm bu4820 kd bu4920 1.9v hl bu4819 kc bu4919 1.8v hk bu4818 kb bu49 18 1.7v hj bu4817 ka bu4917 1.6v hh bu4816 jz bu4916 1.5v hg bu4815 jy bu4915 1.4v hf bu4814 jx bu4914 1.3v he bu4813 jw bu4913 1.2v hd bu4812 jv bu4912 1.1v hc bu4811 ju bu4911 1.0v hb bu4810 jt bu4910 0.9v ha bu4809 js bu4909
4 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 ? absolute maximum ratings parameter symbol limits unit power supply voltage v dd - 0.3 to +7 v output voltage nch open drain output v out gnd - 0.3 to +7 v cmos output gnd - 0.3 to v dd +0.3 output current io 70 ma power dissipation ssop5 *1*4 p d 540 mw sop4 *2*4 400 vsof5 *3*4 210 operation temperature range t opt - 40 to +125 c ambient storage temperature tstg - 55 to +125 *1 when used at temperatures higher than ta=25 , the power is reduced by 5.4mw per 1 above 25 . *2 when used at temperatures higher than ta=25 , the power is reduced by 4.0mw per 1 above 25 . *3 when used at temperatures higher than ta=25 , the power is reduced by 2.1mw per 1 above 25 . *4 when a rohm standard circuit board (70mm 70mm1.6mm, glass epoxy board)is mounted. ? electrical characteristics parameter symbol condition limits unit min. typ. max. detection voltage v det v dd =h ? l , ta=25 , r l =470k ? ? ? ? 1.1v
5 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 unless otherwise specified ta= - 25 to 125 parameter symbol condition limit unit min. typ. max. circuit current when on i dd 1 v dd =v det - 0.2v v det = 0.9 - 1.3v - 0.15 0.88 a v det =1.4 - 2.1v - 0.20 1.05 v det =2.2 - 2.7v - 0.25 1.23 v det =2.8 - 3.3v - 0.30 1.40 v det =3.4 - 4.2v - 0.35 1.58 v det =4. 3 - 4.8v - 0.40 1.75 circuit current when off i dd 2 v dd =v det +2.0v v det =0.9 - 1.3v - 0.30 1.40 a v det =1.4 - 2.1v - 0.35 1.58 v det =2.2 - 2.7v - 0.40 1.75 v det =2.8 - 3.3v - 0.45 1.93 v det =3.4 - 4.2v - 0.50 2.10 v det =4.3 - 4.8v - 0.55 2.28 operat ing voltage range v opl v ol ? ? low output voltage high output vref v out v dd gnd vref v out v dd gnd
6 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 ? typical performance curves fig.3 circuit current fig.4 low output current high output current 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 1 2 3 4 5 6 7 v dd supply voltage [a] 0 5 10 15 20 25 0 1 2 3 4 5 6 drain-source voltage 0 1 2 3 4 5 0.0 0.5 1.0 1.5 2.0 2.5 drain-source voltage 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 v dd supply voltage
7 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 ? typical performance curves C 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.5 1.0 1.5 2.0 2.5 v dd supply voltage 1.0 1.5 2.0 -40 0 40 80 120 temperature +v 0.0 0.2 0.4 0.6 0.8 1.0 -40 0 40 80 120 temperature [a ] 0.0 0.1 0.2 0.3 0.4 0.5 -40 0 40 80 120 temperature [a ]
8 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 ? typical performance curves C 0.0 0.2 0.4 0.6 0.8 1.0 -40 0 40 80 120 temperature
9 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 ? application information explanation of operation for both the open drain type(fig.12)an d the cmos output type(fig.13), the detection and release voltages are used as threshold voltages. when the voltage applied to the v dd pins reaches the applic able threshold voltage, the v out terminal voltage switches from either high to low or from lo w to high. because the bu48 or another power supply [the output high voltage ( timing waveforms v dd v det + q2 q1 vref r1 r2 r3 v out v dd gnd reset q1 vref r1 r2 r3 v out v dd gnd r l v dd reset
10 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 ? circuit applications 1) examples of a common power supply detection reset circuit application examples of bu48 xx series (open drain output type) and bu49 xx series (c mos output type) are shown below. case1:the power supply of the microcontroller (v dd 2 ) differs from the power supply of the reset detection ( v dd 1 ). use the open drain output type (bu48 xx series ) . a ttach a load resistance (r l ) between the output and v d d 2. (as shown fig.15) case2:the power supply of the microcontroller (v dd 1 ) is same as the power supply of the reset detection (v dd 1 ). use cmos output type (bu43 xx series ) or open drain output type (bu48 xx series ) . a ttach a load resistance (r l ) between the output and v dd 1. (as shown fig.16) when a capacitance c l for noise filtering f or setting the output delay time is connected to the v out pin (the reset signal input terminal of the microcontroller), please take into account the waveform of the rise an d fall of the output voltage (v out ). 2) the following is an example of a circuit application in which an or connection between two types of detection voltage resets the microcontroller. to reset the microcontroller when many indepe ndent power supplies are used in the system, or connect an open drain output type (bu48xx series) to the microcontrollers input with pull , output h igh voltage of micro v dd1 v dd3 gnd r st microcontroller r l v dd2 b u48 exx x no.1 b u48 x x no.2 v dd1 bu48 xx v dd2 gnd c l (capacitor for noise filtering ) r l c in r st micro controller c l (capacitor for noise filtering ) v dd1 bu49 xx c in gnd r st micro controller
11 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 3 ) examples of the power supply with resistor dividers in applications where the power supply input terminal (vdd) of an ic is connected through resistor dividers, it is possible that a through cu rrent will momentarily flow into the circuit when the output logic switches, resulting in malfunctions (such as output oscillatory state). (through - current is a current that momentarily flows from the power supply (vdd) to ground (gnd) when the output leve l switches from high to low or vice versa.) the input voltage to descends, when the output switches from low to high. when the inp decreases and falls below the detection voltage, the output voltage switches from high to low. at this current stops flowing through output low, and the voltage drop is eliminated. as a result, the output switches from l ow to high, which again causes the through current to flow and the v out r2 v dd bu48 xx bu49 xx gnd r1 i1 v1 cin c l 0.001 0.01 0.1 1 10 3 4 5 6 7 8 9 10 idd - peak[ma] vdd[v] vdd - idd peak current ta=25 c bu49xx,bu43xx bu48xx,bu42xx bd52xx bd53xx temp - idd(bu42xx) 0.0 0.5 1.0 1.5 2.0 2.5 -50 -30 -10 10 30 50 70 90 110 130 temp idd peak current[ma] vdd3v vdd6v vdd7v vdd4v
12 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 ? operational notes 1) absolute m aximum r atings operating the ic over th e 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 important 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. ensure 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 . the e lectrical characteristics are guaranteed under the conditions of each parameter . 4) bypass capacito r 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 using extremely big capacitor as transient response will be affected. 5) short between pins and mounting er rors 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 together . s hort circuit may be caused by conductive particles caught between the pins. 6) operation under str ong 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) the recommended value of r l resistor is over 1 0k? .8v, and over 100k? 0k to 1m. there are many factors (board layout, etc) that can affect the ic to stress. always discharge capacitors completely after each process or step. the ics power supply should
13 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 physical dimension , tape and reel information package name ssop5
14 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 physical dimension , tape and reel information package name sop4
15 / 15 bu48 xx s eries bu49 xx s eries tsz02201 - 0r7r0g300060 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 02.nov.2015 rev.012 www.rohm.com tsz22111 15 001 physical dimension , tape and reel information package name vsof5
datasheet d a t a s h e e t notice-pga-e rev.00 2 ? 2015 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufac tured for application in ordinary elec tronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electroni c appliances, amusement equipment, etc.). if you intend to use our products in devices requiring ex tremely high reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecra ft, nuclear power controllers, fuel c ontrollers, 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 sale s representative in advance. unless otherwise agreed in writing by rohm in advance, ro hm 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 ro hm?s products for specific applications. (note1) medical equipment classification of the specific applications japan usa eu china class class class b class class 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 responsibilities, adequate safety measures including but not limited to fail-safe desi gn 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 products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditio ns, as exemplified below. accordin gly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of an y rohm?s products 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 bel ow), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] use of our products in any types of liquid, incl uding water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products ar e 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 products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (ev en if you use no-clean type fluxes, cleaning 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 products in places subject to dew condensation 4. the products are not subjec t to radiation-proof 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 per iod of time, such as pulse. is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 7. de-rate power dissipation depending on ambient temperatur e. when used in sealed area, c onfirm that it is the use in the range that does not exceed t he maximum junction temperature. 8. confirm that operation temperat ure is within the specified range descr ibed in the product specification. 9. rohm shall not be in any way responsible or liable for fa ilure induced under deviant condi tion from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the resi due of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be us ed on a surface-mount products, the flow soldering method must be used on a through hole mount products. if the flow sol dering method is preferred on a surface-mount products, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification
datasheet d a t a s h e e t notice-pga-e rev.00 2 ? 2015 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, pl ease allow a sufficient margin c onsidering variations of the characteristics of the products and external components, including transient characteri stics, as well as static characteristics. 2. you agree that application notes, re ference designs, and associated data and in formation contained in this document are presented only as guidance for products use. theref ore, in case you use such information, you are solely responsible for it and you must exercise your own indepen dent verification and judgment in the use of such information contained in this 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 product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution in your manufacturing process and storage so that voltage exceeding t he products maximum rating will not be applied to products. please take special care under dry condit ion (e.g. grounding of human body / equipment / solder iron, isolation from charged objects, se tting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriora te if the products are stor ed in the places where: [a] the products are exposed to sea winds or corros ive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to di rect sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the co rrect direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. use products within the specified time after opening a hum idity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage time period. precaution for product label qr code printed on rohm products label is for rohm?s internal use only. precaution for disposition when disposing products please dispose them proper ly using an authorized industry waste company. precaution for foreign exchange and foreign trade 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 and data including but not limited to application example contain ed in this document is for reference only. rohm does not warrant that foregoi ng information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. 2. rohm shall not have any obligations where the claims, actions or demands arising from the co mbination of the products with other articles such as components, circui ts, 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 informati on contained in this document. pr ovided, however, that rohm will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the produc ts, subject to the terms and conditions herein. other precaution 1. this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any wa y whatsoever the products and the related technical information contained in the products or this document for any military purposes, incl uding 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 bu4809f package sop4 unit quantity 3000 minimum package quantity 3000 packing type taping constitution materials list inquiry rohs yes bu4809f - web page distribution inventory

▲Up To Search▲

Price & Availability of BU4944G-TR

	To Download BU4944G-TR Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .