Magnetoresistive Sensor ICs Nanopower Series DatasheetMagnetoresistive Sensor ICs Honeywells Nanopower Series Magnetoresistive (MR) Sensor ICs are ultra-sensitive devices designed to accommodate a wide range of applications with large air gaps, small magnetic fields and low power requirements. The sensor ICs respond to either a North or South pole applied in a direction parallel to the sensor. They do not require the magnet polarity to be identified, simplifying installation and potentially reducing system cost. These sensor ICs use a very low average current consumption and a push-pull output which does not require a pull-up resistor. The sensor ICs can operate from a supply voltage as low as 1.65 V, promoting energy efficiency. The Nanopower Series is available in two magnetic sensitivities to accommodate a variety of application needs: SM351LT: For applications requiring ultra high magnetic sensitivity (7 G typical operate, 11 G maximum operate) and a very low current draw (360 nA typical). SM353LT: For applications requiring very high magnetic sensitivity (14 G typical operate, 20 G maximum operate) and a very low current draw (310 nA typical). These Magnetoresistive Sensor ICs, Nanopower Series, are supplied in the subminiature SOT-23 surface mount package on tape and reel (3000 units per reel), for use in automated pick-and-place component installation. Key Features Potential Applications High sensitivity: 7 Gauss typ., 11 Gauss max. (SM351LT) INduSTRIaL 14 G typ., 20 Gauss max. (SM353LT) Mobile equipment (i.e., handheld computing equipment, Nanopower: Average current of 360 nA typ. (SM351LT) and scanners) 310 nA typ. (SM353LT) Water, electric and gas utility meters Supply voltage range: 1.65 Vdc to 5.5 Vdc simplifies Building access control reed switch replacement for battery- design-in operated security systems Omnipolar sensing: Activates with either pole from a Industrial smoke detectors magnet MEdICaL Temperature range: -40 C to 85 C -40 F to 185 F E xe rc i se e qui pm e nt Push-pull output: Does not require external pull-up resistor I nf usi on p ump s Non-chopper stabilized design D r awe r p o s i ti o n s e n s i n g (e.g., m e d i c a l c a b i n e ts) RoHS-compliant materials: Meets Directive 2002/95/EC Ho s pit a l b e d s Package: SOT-23 WHITE GOOdS L i d, d o o r a n d d r awe r p o s i ti o n d e te c ti o n F l u i d fl ow MEdIuM-SIZEd CONSuMER ELECTRONICS B a t te r y- o pti m i z a ti o n p o s i ti o n s e n s o r HIGH SENSITIVITy NANOPOWEr sensing.honeywell.com 2