SS249 cmos omnipolar high sensitivity micropower hall switch packages features and benefits ? solid-state reliability much better than reed switch ? omnipolar, output switches with absolute value of north or south pole from magnet ? operation from 3.5v to 24v ? high sensitivity for di rect reed switch replacement applications 3 pin sot23 (suffix so) 3 pin sip (suffix ua) ? ? functional block diagram application examples ? solid state switch ? speed detection ? interrupter ? magnet proximity sens or for reed switch replacement ? ? general description: the SS249 omnipolar hall effect sensor ic is fabricat ed from mixed signal cmos technology .it incorporates advanced chopper-stabilization techniques to provide accurate and stable magnetic switch points. the output transistor of the SS249 will be latched on (bop ) in the presence of a sufficiently strong south or north magnetic field facing the marked side of the package. the output will be latched off (brp) in the absence of a magnetic field. ? 1 v2.10 may 1, 2012
SS249 cmos omnipolar high sensitivity micropower hall switch typical application circuit sec's pole-independent sensing technique allows for operation with either a north pole or south pole magnet orientation, enhancing the manufacturability of the device. the state-of-the-art technology provides the same output polarity for either pole face. it is strongly recommended that an external bypass be connected (in close proximity to the hall sensor) between the supply and ground of the device to reduce both external noise and noise generated by the chopper-stabilization technique. this is especially true due to the relatively high impedance of battery supplies. 2 v2.10 may 1, 2012 internal timing circuit ? current perio d i aw sam ut ple & outp latched SS249 r2 c2 vdd gnd out c1 SS249 d1 z1 c1 out gnd vdd c2 r2 r1:100 a utomotive and severe environment protection circuit typical three-wire application circuit i av i sp awake taw: 175 s sleep tsl: 70ms 0 time
SS249 cmos omnipolar high sensitivity micropower hall switch pin definitions and descriptions ? sot pin sip pin name type function 1 1 vdd supply supply voltage pin 2 3 out output open drain output pin 3 2 gnd ground ground pin table 1: pin definitions and descriptions absolute maximum ratings parameter symbol value units supply voltage (operating) v dd 6 v supply current i dd 5 ma output voltage v out 6 v output current i out 5 ma operating temperature range t a -40 to 85 c storage temperature range t s -50 to 150 c esd sensitivity - 4000 v table 2: absolute maximum ratings exceeding the absolute maximum ratings may cause permanent damage. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. dc electrical characteristics dc operating parameters: t a = 25 , v dd = 2.75v. parameter symbol test conditions min typ max units operating voltage v dd operating 2.5 3 5.5 v supply current i dd average 5 a output current i out 1.0 ma saturation voltage v sat i out = 1ma 0.4 v awake mode time t aw operating 175 s sleep mode time t sl operating 70 ms table 3: dc electrical characteristics 3 v2.10 may 1, 2012
SS249 cmos omnipolar high sensitivity micropower hall switch magnetic characteristics operating parameters: t a = 25c, v dd = 2.75v dc ss259 parameter symbol min type max units operating point b op - +/-35 +/-60 gs release point b rp +/-5 +/-21 - gs hysteresis b hyst - 14 - gs table 4: magnetic specifications 0 -20 -40 -80 -60 80 60 20 40 0 output voltage (v) on b ops b rps b opn b rpn 2.5 0.5 1.0 1.5 2.0 3.0 off magnetic flux (gauss) esd protection human body model (hbm) tests according to: mil. std. 883f method 3015.7 limit values parameter symbol min max unit notes esd voltage v esd ?4 kv 4 v2.10 may 1, 2012
SS249 cmos omnipolar high sensitivity micropower hall switch performance characteristics ? 5 v2.10 may 1, 2012
SS249 cmos omnipolar high sensitivity micropower hall switch unique features cmos hall ic technology the chopper stabilized amplifier uses switched capacitor tech niques to eliminate the amplifier offset voltage, which, in bipolar devices, is a major source of temperature sensit ive drift. cmos makes this advanced technique possible. the cmos chip is also much smaller than a bipolar chip, allowing very sophisticated circuitry to be placed in less space. the small chip size also contributes to lower physical stress and less power consumption. installation comments consider temperature coefficients of hall ic and magneti c, as well as air gap and life time variations. observe temperature limits during wave solderi ng. typical ir sold er-reflow profile: ? no rapid heating and cooling. ? recommended preheating for max. 2minutes at 150c ? recommended reflowing for max. 5seconds at 240c ? esd precautions electronic semiconductor products are sensitive to electro static discharge (esd). always observe electro static discharge control pr ocedures whenever handling semiconductor products. 6 v2.10 may 1, 2012
SS249 cmos omnipolar high sensitivity micropower hall switch package ua, 3-pin sip: ? 7 v2.10 may 1, 2012
SS249 cmos omnipolar high sensitivity micropower hall switch package sot, 3-pin sot-23: sot-23 package hall location: ordering information part no. pb-free temperature code package code packing ss259esot yes -40c to 85c sot-23 7-in. reel, 3000 pieces/reel ss259eua yes -40c to 85c to-92 bulk, 1000 pieces/bag ss259ksot yes -40c to 125c sot-23 7-in. reel, 3000 pieces/reel ss259kua yes -40c to 125c to-92 bulk, 1000 pieces/bag ss259lsot yes -40c to 150c sot-23 7-in. reel, 3000 pieces/reel ss259lua yes -40c to 150c to-92 bulk, 1000 pieces/bag ? 8 v2.10 may 1, 2012
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