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.

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 batteryoperated 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 flow

MEDIUM-SIZED CONSUMER ELECTRONICS
• Battery-optimization position sensor