s3144 unipolar hall - effect digital switch 1 v 3.1 0 nov 1 , 20 1 3 f eat u r es a n d b e n ef i ts ? 4.5v to 24v operation ? - 40 c to 150 c superior temperature operation ? bipolar t e c hno l ogy ? open - collector 25 ma output ? reverse battery protection ? small size sot 23 3l or sip 3l ? solid - state reliability ? resistant to physical stress ? activa te with small, commer cially available permanent magnets application examples ? a uto m ot i ve, c on s um er and indu s t ri al ? s o l i d - s ta t e s w i t c h ? b r u s h l e s s dc m otor c omm uta t i on ? s pe ed d ete c t i on ? l i n ear p os i t i on dete c t i on ? a ngul ar pos i t i on d ete c t i on ? p r o xi m i t y d e te c t i on 3 pin sot23 (suffix so) 3 pin sip (suffix ua) v dd out voltage regulatr chopper hall plate gnd sip package sot package pin 1 ? v dd pin 1 ? v dd pin 2 ? gnd pin 2 ? out pin 3 ? out pin 3 ? gnd f unctional block diagram
s3144 unipolar hall - effect digital switch 2 v 3.1 0 nov 1 , 20 1 3 general descri p tion s the s3144 is a uni polar hall - e ffect sensor ic fabr i ca t- ed from bipolar technology. the de v i c e i n teg r a t es a vo l t a g e r e gu l ato r , revers e battery protection diode, h a l l s en s or w i th d y na m i c of f s et c an c e l l a t i on s y s te m , temperature compensation circuitry, small signal a m- plifier, s c hm i tt t r i gger and a n open - collector out put to sink up to 25 ma. with suitable output pull up, they can be used wi th bipolar or cmos logic circuits. these hall - effect switches are monolithic integrated circuits with tighter magnetic specifications, designed to ope r ate continuously over extended temperatures to +150 c ,and are more stable with both temperature and supp ly voltage changes. the unipolar switching cha r- acteris tic makes these devices ideal for use with a si m- ple bar or rod ma g net. thanks to its wide operating voltage range and exten d- ed choice of temperature range, it is quite suitable for use in automotive, in dustrial and consumer applic a- tions. the device is delivered in a small outline transistor (sot) or in a plastic single in line ( sip 3l flat) . both 3- l ead packages are rohs compliant. glossary of terms millitesla (mt), gauss units of magnetic flux densit y: 1mt = 10 gauss rohs restriction of hazardous substances operating point ( b op ) magnetic flux density applied on the branded side of the package which turns the output driver on (v out = v dson ) release point (b rp ) magnetic flux density appli ed on the branded side of the package which turns the output driver off (v out = high)
s3144 unipolar hall - effect digital switch 3 v 3.1 0 nov 1 , 20 1 3 pin definitions and descriptions absolute maximum ratings p ar am eter s y m b o l v al ue un i ts s upply v oltage v dd 28 v s upply cu rr ent i dd 50 m a output v o ltage v o ut 28 v output cu rr ent i o ut 50 m a s to r age t e m pe r atu r e range t s - 65 to 170 c o pe r at i ng t e m pe r atu r e r a nge s y m b o l v al ue un i ts t e m pe r atu r e s uffix ? e ? t a - 40 to 85 c t e m pe r atu r e s uffix ? k ? t a - 40 to 125 c t e m pe r atu r e s uffix ? l ? t a - 40 to 150 c e xc eed i ng t he ab s o l ute m a x i m u m r at i ngs m a y c a us e pe r m anent da m age. e xpo s ur e to ab s o l ute - m a xi m u m - r ated c o ndi t i o ns f or e x- ten ded pe r i o ds m a y a ff e c t de v i c e r e l i a bi l i t y sot p i n sip pi n na m e t y pe f un c t i o n 1 1 v dd s upply s upply v oltage pin 2 3 out output open d r ain output pin 3 2 gnd g r ound g r ound pin
s3144 unipolar hall - effect digital switch 4 v 3.1 0 nov 1 , 20 1 3 general electrical specifications dc o pe r a t i ng p a r a m ete r s t a = 25c , v dd = 4. 5v to 2 4v ( un l e s s ot he r w i s e s p e c i f i ed) p ar am eter s y m b o l t e s t cond i t i ons m i n t y p max un i ts s upply v o ltage v dd ope r ating 4.5 24 v s upply cu rr ent i dd b < b rp 4 5 7 m a output s atu r ation v o ltage v d so n i o ut = 20 m a , b > b op 0.3 0.5 v output leakage cu rr ent i o ff b < b rp v o ut = 24v 0.1 10 a output rise t i m e t r r l = 820? , c l = 20pf 0.04 2.0 s output f all t i m e t f r l = 820? , c l = 20pf 0.18 2.0 s magnetic specifications dc operating parameters vdd = 4 . 5 to 24v (unless otherwise specified) package parameter symbol test conditions min typ max units ua operating point b op ta=25c,vdd=12v dc 150 170 190 g release point b rp 100 125 160 g hysteresis b hyst 45 g so operating point b op ta=25c,vdd=12v dc - 190 - 170 - 150 g release point b rp - 160 - 125 - 100 g hysteresis b hyst 45 g output behavior versus magneti c pole dc operating parameters ta = - 40c to 150 c , vdd = 4. 5 to 24v (unless otherwise specified) test conditions (ua) test conditions (so) out b < b rp b > b rp high b > b op b < b op low the sot - 23 device is reversed from the ua pack age. the sot - 23 outp ut transistor will be turned on (drops low) in the presence of a sufficiently strong nor th pole magnetic field applied to the marked face.
s3144 unipolar hall - effect digital switch 5 v 3.1 0 nov 1 , 20 1 3 application information package information package ua, 3 - pin sip: 4.0 0.01 1 2 3 1.27 2.13 1.87 1.00 1.20 45 1 1.52 0.1 3 1 0.75 0.05 3.0 0.01 0.44 0.01 0.05 0.05 1.6. 0.1 0.84(nom) 3 1 6 1 6 1 3 1 14 .5 1 active area depth: sensor location 1 2 3 notes: 1). controlling dimension : mm ; 2). le a ds must be free of flash and plating voids ; 3). do not bend leads within 1 mm of lead to package interface ; 4). pinout: pin 1 v dd pin 2 gnd pin 3 output 0.39 0.01 0.38 0.01 2.54
s3144 unipolar hall - effect digital switch 6 v 3.1 0 nov 1 , 20 1 3 package so , 3- pin sot - 23 ordering information part no. pb - free temperature code package code packing s3144 esot yes - 40c to 85c sot - 23 7- in. reel, 3000 pieces/reel s3144 eua yes - 40c to 85c to - 92 bulk, 1000 pieces/bag s3144 k sot yes - 40c t o 12 5c sot - 23 7- in. reel, 3000 pieces/reel s3144 k ua yes - 40c to 12 5c to - 92 bulk, 1000 pieces/bag s3144 lsot yes - 40c to 150c sot - 23 7- in. reel, 3000 pieces/reel s3144 lua yes - 40c to 150c to - 92 bulk, 1000 pieces/bag 2.70 3.10 1.00 1.30 0.70 0.90 0.00 0.10 0.35 0.50 0.10 0.25 0.20 m in 2.60 3. 00 1.50 1.8 0 1.70 2.10 3 2 1 top side vie end notes 1). pinout: pin 1 v dd pin 2 output pin 3 gnd 2). all dimensions are in millimeters;
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