Data Sheet

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sensing.honeywell.com
Magnetoresistive Sensor ICs
Honeywell’s 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:
• SM 351LT: 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.
HIGH SENSITIVITy • NANOPOWEr
Key Features
• High sensitivity: 7 Gauss typ., 11 Gauss max. (SM351LT);
14 G typ., 20 Gauss max. (SM353LT)
• Nanopower: Average current of 360 nA typ. (SM351LT) and
310 nA typ. (SM353LT)
• Supply voltage range: 1.65 Vdc to 5.5 Vdc; simplifies
design-in
• Omnipolar sensing: Activates with either pole from a
magnet
• Temperature range: -40 °C to 85 °C [-40 °F to 185 °F]
• Push-pull output: Does not require external pull-up resistor
• Non-chopper stabilized design
• RoHS-compliant materials: Meets Directive 2002/95/EC
• Package: SOT-23
Potential Applications
INDUSTRIAL
• Mobile equipment (i.e., handheld computing equipment,
scanners)
• Water,electricandgasutilitymeters
• Buildingaccesscontrol;reedswitchreplacementforbattery-
operated security systems
• Industrialsmokedetectors
MEDICAL
• Exerciseequipment
• Infusionpumps
• Drawerpositionsensing(e.g.,medicalcabinets)
• Hospitalbeds
WHITE GOODS
• Lid,dooranddrawerpositiondetection
• Fluidow
MEDIUM-SIZED CONSUMER ELECTRONICS
• Battery-optimizationpositionsensor