2 dimensions in millimeters (inches) redrock ? mems-based reed sensor ideally suited to the needs of medical, industrial, instrumentation, automotive, and other applications where small size, zero power operation, and directional magnetic sensitivity are required, the redrock ? mems-based reed sensor is a single-pole, single throw (spst) device with normally open ruthenium contacts. te sensor may be actuated by an electromagnet, a permanent magnet, or a combination of both. redrock ? mems-based reed sensor u 1.11mm 2 footprint C worlds smallest reed sensor u highly directional magnetic sensitivity u hot switchable u 7 50 g shock resistance u wide operating temperature range u hermetically sealed u ideal for smd pick and place u tape and reel packaging u rohs compliant redrock ? mems-based reed sensor u medical devices u battery powered devices u prosthetics u robotics u animal tracking u high resolution position & level sensing applications top vi ew side vi ew bottom vi ew 1.05(0.041) 0.84(0.033) 1.32(0.052) 0.457(0.018) 0.80(0.031) 0.686(0.027) 0. 43 5 (0 .0 17 ) 0.300 (0.012) 0.735(0.029) 1.285(0.051) 0.744(0.029) 0.185(0.007) 0.55(0.022) top vi ew side vi ew bottom vi ew 1.05(0.041) 0.84(0.033) 1.32(0.052) 0.457(0.018) 0.80(0.031) 0.686(0.027) 0. 43 5 (0 .0 17 ) 0.300 (0.012) 0.735(0.029) 1.285(0.051) 0.744(0.029) 0.185(0.007) 0.55(0.022) recommended pcb land pattern as viewed from bottom of die (pad side) allfspecifcationsfareftypicalfunlessfotherwisefspecifedfandfsubjectftofchangefwithoutfnotice. forfmorefinformationfpleasefreferftofcotoftechnologysfproductfwarranty,ftrademarksf&fdisclaimers. rev.f0 320 2 015 operating temperature range is -40oc to +85oc ordering information part number rr100-x w tr model number rr100 typical magnetic sensitivity j=20mt k=12mt package style w=wafer level product packaging tr=tape/reel ordering information (evaluation kit) part number: rr100-ek1 ? coto technology | tel: (401) 943.2686 | cotorelay.com
3 redrock ? rr100 parameters units min typ max operating characteristics operatefsensitivity 1 f-fk f ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff j mt 12 f 20 operateftimef(includingfbounce) s 500 releaseftime s 500 electrical characteristics switchedfvoltage vdc 6 switchedfcurrent mafdc 1 breakdownfvoltage vdc 50 contactfresistancef(initial) w 10 contactfcapacitance pf 0.2 insulationfresistancef(min.) w 10 12 life expectancy 1.2vdc,f1mafswitchingfload 2 operations 10 7 environmental ratings storageftemperature oc -55ftof+150 operatingftemperature oc -40ftof+85 vibrationfresistancef-ffunctional 3 g 100 shockfresistancef-ffunctional 4 g 750 shearfforce 5 gm 400 notes: 1 individual switches may vary in magnetic closure sensitivity by 4 mt (model k) or 7 mt (model j) from the typical value. if your application requires a diferent sensitivity range, please contact coto at redrock@cotorelay.com . 2 life expectancy defned as mean cycles before failure with end of life defned as contact resistance >1000 w . 3 functional vibration resistance is defned as the mechanical-only force (in g, 110 hz - 3 khz), that a switch can withstand without causing a contact closure. 4 functional shock resistance is defned as the mechanical-only force (in g), that a switch can withstand without causing a contact closure. 5 shear force is the mechanical force (applied to the top half, in a plane parallel to the pcb) that a switch can withstand without causing damage to the switch. redrock ? mems-based reed sensor for all inquiries, please contact redrock@cotorelay.com rev.f0 320 2 015 coto technology | tel: (401) 943.2686 | cotorelay.com
4 3o 1. 08 (. 04 3) ao re v. 1 1. 12 (. 04 4) ko re v. 1 4. 00 (. 15 7) p 3. 50 0 .0 5 (0 .1 38 0 .0 01 ) f 6. 25 (0 .2 46 ) e2 mi n 8. 30 (0 .3 27 ) ma x w 8. 0 (0 .3 15 ) nomi na l 1. 75 (0 .0 69 ) e1 ? 1. 50 do +. 10 -. 00 4. 00 (0 .1 57 ) po 3o 1. 57 (. 06 2) bo 2. 00 0 .0 5 (0 .07 90 .0 01 ) p2 .0 59 1 +. 00 39 -. 0 000 [] .3 0 (. 01 2) t pock et size ao - 1. 08 mm (. 04 3? ) bo - 1. 57 mm (. 06 2? ) ko - 1. 12 mm (. 04 4? ) redrock ? technical & applications information rev.f02122015 switch angle sensitivity attachment details switch packaging switch functional diagram expected life fig. 1: black points indicate relative magnetic closure sensitivity of the rr100 switch. switch viewed from top. note position of switch orientation dot. te rr100 switch may be attached to the users circuit board us - ing either snpb eutectic alloy or sac alloy solder pastes. recom - mended refow profles for both types of solder are shown below. standard packaging for the rr100 switch is tape and reel. dimensions are shown below. fig. 3: recommended refow profle C snpb alloy fig. 4: recommended refow profle C sac alloy. fig. 5: tape and reel packaging fig. 2: switch is magnetically operated, normally-open, single- pole, single-throw (spst). closes when immersed in a magnetic feld that exceeds 20 mt (type j) or 12 mt (type k) operation is independent of the magnetic polarity. ten million cycles, 1.2 v 1.2 ma hot switched load, when oper - ated by a magnetic feld having twice the nominal closure feld. end of life defned as contact resistance exceeding 1000 . 90 60 12 0 15 03 0 0 18 0 21 03 30 30 0 24 0 2 27 0 14 10 8 14 12 8 6 6 4 4 2 10 14 12 10 14 12 10 88 66 44 22 12 adv on (mm) vs angle polar retract off (mm) vs angle polar rr 10 0 2 2 2 2 2 pre -heating zone pre -?ow zone re?ow zone t ime above 183c (60 - 90 sec) peak temperature 226c max cooling zone ambient time (sec) temperature ( c) 250 200 150 100 50 0 30 60 90 120 150 180 210 240 270 300 0 pre -heating zone <2.5c/sec pre -?ow zone re?ow zone t ime above 217c (60 - 90 sec) peak temperature 235-260c (20 sec max) cooling zone time (sec) temperature ( c) ambient 300 250 200 150 100 50 0 30 60 90 120 150 180 210 240 270 300 0 no magnetic field magnetic field present 1 switch pads 2 coto technology | tel: (401) 943.2686 | cotorelay.com
5 redrock ? technical & applications information rev.f02122015 sample applications circuits general applications notes and information 1. conversion to single pole single throw normally closed operation in some cases, it is desirable for the switch to open in the pres - ence of a magnetic feld rather than to close. tis functionality can be achieved with the circuit shown below, which incorporates a p-channel enhancement-mode mosfet. r2 can be selected in the range of 100 megohms to several thousand megohms depending on the characteristics of the mosfet. when the redrock switch is open, the gate is negative biased relative to the source, allowing battery current to fow to the load. conversely, when the switch is closed, the mosfet turns of. note that a small quiescent current drained from the battery through r2 while the switch is closed. bear this in mind when selecting the battery type and value of r2. 1. choosing magnets te rr100 switch can be operated by any permanent magnet that generates a magnetic feld at the required operating distance that is greater than the lower end of the switchs nominal closure sensitivity range. for example, a RR100-JWTR switch will close when immersed in a feld that exceeds 20 mt, when it is angled towards the pole of the magnet at the angle shown in figure 1. tis is the minimum required feld; for optimum contact life, a higher feld is desirable, and there is no maximum feld that will damage the switch. bear this in mind when designing a switch- magnet system. 2. mt vs a/m, gauss and oe coto specifes switch closure sensitivity in mt (millitesla). one mt is equivalent to exactly 10 gauss or approximately 1.257 a/m (amps per meter). one oe (oersted) = 1 gauss in air. 3. magnetic overdrive magnetic overdrive is any excess magnetic feld above the mini - mum level needed to just close the switch. for example, if the nominal closure feld is 20 mt and the switch is immersed in a feld of 40 mt, 100% overdrive is being applied. overdrive is desirable, since higher forces are applied to the contacts, and the contact resistance is reduced. tere is no level of overdrive 2. interfacing redrock with microcontrollers most low power microcontrollers, have one or more pins des - ignated as interrupt or wake-up pins. suitably programmed, the microcontroller recognizes a positive or negative logic level transition on the designated pin and changes from a sleep mode where very little power is consumed to full operational mode. te rr100 switch shown in figure 7 is normally closed by a magnet; when it opens, the wake-up pin goes low, waking up the microcontroller. r2 should be chosen to be as large a value as possible, but no higher than one-tenth the input impedance of the wake-up pin. tis will minimize the quiescent current draw through r1 and r2 while the switch is closed. consult the microcontroller documentation for further details. fig. 6: conversion to normally closed (n/c) functionality, using p-channel, enhancement mode mosfet. fig. 7: typical method of interfacing an rr100 switch to a low- power microcontroller. when rr100 switch opens, wake-up pin goes logic low, bringing microcontroller out of sleep mode. r2 should be no greater than one-tenth of the microcontrollers input pin impedance. rr100 switch r1 load 1 meg r2 bat pmos m1 microcontroller wake-up pin rr100 switch r1 10k r2 see note vcc coto technology | tel: (401) 943.2686 | cotorelay.com
6 redrock ? technical & applications information rev.f02122015 te following applications notes and white papers relating to the rr100 switch are available in the resource library area of the coto website. 1. f whitefpaper:fmems-basedfmagneticfreedf switchftechnology 2. f ieeefholmfconferencefpaper:ffafhighfaspectf ratiofmicrofabricatedfswitchfcapablefoffhotf switching 3. f techftips:fsolderingfguidelinesfforfthefredrockf switch 4. f techftips:fangularfsensitivityfmapfoffredrockf switch 5. f techftips:foptimalfz-axisfmagnetfpositioningfoff redrockfswitch information resources general applications notes and information, cont. glossary of terms that can damage the switch. terefore, use the strongest, largest magnet that is practical for the application. 4. high felds cannot damage switch strong magnetic felds will not damage the switch or change its closure sensitivity. 5. polarity insensitive te switch responds equally to n (positive) or s (negative) felds. 6. optimum orientation of magnet relative to switch te switch has maximum closure sensitivity when the magnet is oriented at 60o relative to its long axis. refer to the diagram in fig. 1, and note that the position of the location dot is important. 7. magnetic environment near the switch is important ferrous materials such as metal frames and component enclo - sures etc. located near the magnet and switch can alter the switch closure sensitivity, by attenuating or enhancing the feld reach - ing the switch. coto recommends that the switch and magnet be tested in the applications environment, including all ferrous structures. 8. shunts and feld concentrators ferrous structures located near the magnet and switch can sometimes be used advantageously to increase the magnetic feld strength near the switch and increase its apparent magnetic sensitivity. tese arrangements can be investigated experimen - tally, but simulation using magnetic modeling programs is more efcient. 9. contact debouncing since the rr100 is a mechanical switch, the contacts may bounce after closure. implement a hardware or software de - bounce solution if contact bounce is likely to cause switching logic problems. operate value (mt): te mt value at which normally-open contacts close. lower values refect higher sensitivity. operate time: te operate time is the time between the instant of application of a magnetic feld to a dry-reed switch and the instant of the frst physical closing of this switch. te operate time does not include bounce time. release value (mt): te mt value at which normally-open contacts, held closed by a magnetic feld, will re-open as feld strength is reduced. release time: te release time is the time between the in - stant of removal of an applied magnetic feld to a dry-reed switch and the instant of the frst physical opening of this switch. te release time does not include bounce time. bounce: bounce is a momentary opening of a switch after initial closing, or a momentary closing after initial opening. bounce time: te bounce time is the interval of time be - tween the instant of initial closing (or opening) and the instant of fnal closing (or opening) of the dry-reed switch. dry-reed switch contact resistance: te dry-reed switch contact resistance is the resistance of the dry-reed switch under specifed conditions of measurement. dry-reed switch: a dry-reed switch is an electrical switching assembly containing one or more ferromagnetic contact blades, hermetically sealed in a protective envelope, that are forced into contact by an external magnetic feld. te feld may be gener - ated by a current-carrying coil of wire, a permanent magnet, or a combination of both. redrock ? technical & applications information coto technology | tel: (401) 943.2686 | cotorelay.com
7 redrock ? technical & applications information rev.f02122015 coto technology product warranty coto technology, inc. (coto) warrants that during the six (6) or eighteen (18) month period (warranty period) from the date of cotos shipment of switches or relays and other small signal switching products (products), the products will be free from defects in material and workmanship. tis warranty shall not apply to defects caused by disasters such as fre, food, wind, and lightning, or by the actions or inactions of any party other than coto including improper storage, installation, use or maintenance of the products. all other warranties, whether expressed or implied or arising by operation of law, course of dealing, usage of trade, or otherwise, are excluded. there are no implied warranties of merchantability or fitness for any particular purpose. if during the warranty period customer discovers a defect in the material or workmanship of the products, notifes coto in writing within fve (5) days of such discovery, and substantiates that the products have been installed, maintained and operated in accordance with cotos recommendations and standard industry practice, coto shall (at its option) repair or replace the defective products or refund the purchase price of the defective products less the value of any portion of the products retained by customer. repair or replacement of the product shall not extend the warranty period in any manner. these remedies constitute customers exclusive remedies against coto for breach of warranty with respect to the products. in no case shall coto be liable for any special, incidental or consequential damages (including, without limitation, labor, loss of profts, loss of savings or revenue, loss of use of the products, cost of capital, cost of any substitute products, facilities or service, downtime, the claim of third parties including customers, and injury to property) whether due to delays in the production, shipment or delivery of the products or to causes within cotos control and whether based upon breach of any warranty, breach of contract, negligence, strict tort, or any other legal theory. any legal action for breach of warranty must be commenced within the warranty period. if the products are manufactured in accordance with design data approved by the customer; or if they have been modifed or altered without cotos consent; or if the products have been misused, misapplied, damaged or used negligently, customer agrees to hold harmless and indemnify coto against any loss, cost, damage or expense, including, without limitation, cost of defense, attorneys fees, inspectors fees and/or testing, resulting from (a) third party claims for personal injuries or property damage, whether direct or indirect, actual or alleged, consequential or otherwise, notwithstanding any actual or alleged defects or hazard inherent in the products or negligence of coto, its agents, employees or subcontractors, or (b) any recall, inspection, testing, replacement or correction or the products, whether required by governmental authority or otherwise, or (c) the violation of any law, regulation, rule, order or restriction of any governmental authority resulting from or incident to the sale, delivery, installation and/or assembly of the products or (d) any actual or alleged infringement of any united states or foreign patent, copyright or similar common or civil law right. coto technology copyrightf2015fcotoftechnology,finc.,f66fwhitecapfdrive,fnorthfkingstown,frhodefislandf02852,fusa.fallfrightsfreserved.fthefcopyrightfinfthisfdocumentfisf ownedfbyfcotoftechnology,finc.,fafdelawarefcorporation.fanyfpersonfisfherebyfauthorizedftofview,fcopy,fprintfandfdistributefthisfdocumentfsubjectftoftheffol - lowingfconditions:f f u fthefdocumentfmayfbefusedfforfinformationfpurposesfonly.f f u fthefdocumentfmayfonlyfbefusedfforfnon-commercialfpurposes.f f u fanyfcopyfoffthisfdocumentforfportionfthereoffmustfincludefthisfcopyrightfnotice. f trademarks anyfproduct,fprocessforftechnologyfinfthisfdocumentfmayfbefthefsubjectfoffpatentsforfotherfintellectualfpropertyfrightsfreservedfbyfcotoftechnology,ffinc.forfitsf afliatesfandfsubsidiaries,fandfmayfnotfbeflicensedfhereunder.f thefcotoflogofandfthefbrickfredfcolorfoffreedfrelaysfandfmagneticallyfoperatedfencapsulatedfreedfswitchesfmanufacturedfbyfcotofarefregisteredftrademarksfoff cotoftechnologyfinc. allfotherfproductfnames,ftrademarks,fregisteredftrademarks,fservicefmarksforfregisteredfservicefmarks,fmentionedfthroughoutfanyfpartfoffthisfpublicationf belongftoftheirfrespectivefowners. disclaimers thisfpublicationfisfprovidedfasfisfwithoutfwarrantyfoffanyfkindfeitherfexpressedforfimplied,fincluding,fbutfnotflimitedfto,fthefimpliedf warrantiesfoffmerchantability,ffitnessfforfafparticularfpurpose,fnonfinfringementforfarisingffromfafcoursefoffdealing,fusage,ftrade,forf practice.f f fffffffffff thisfpublicationfcouldfcontainftechnicalfinaccuraciesforftypographicalferrors.fchangesfarefperiodicallyfaddedftofthefinformationf herein;fthesefchangesfwillfbefincorporatedfinffuturefrevisionsfoffthisfpublication.fcotoftechnology,ffinc.fmayfmakefimprovementsfand/orf changesfinfthefproduct(s),ftechnicalfspecifications,fandfproductfpromotionsfdescribedfinfthisfpublicationfatfanyftimefwithoutfnotice.f f fffffffff infnofeventfshallfcotoftechnology,finc.fbefliablefforfanyfactual,fincidentalforfconsequentialfdamages,flostfprofitsforflostfdataforfanyf indirectfdamagesfevenfiffcotoftechnology,ffinc.fhasfbeenfinformedfoffthefpossibilityfthereof. redrock ? technical & applications information coto technology | tel: (401) 943.2686 | cotorelay.com
8 copyright coto technology 2015. all rights reserved. 66 whitecap drive north kingstown, ri 02852 401-943-2686 ? fax: 401-942-0920 www.cotorelay.com ? redrock@cotorelay.com rev. 02122015
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