Magnetoresistive Sensor ICs, Nanopower Series

Product Announcement from Honeywell Sensing and Internet of Things

Honeywell is pleased to announce its new Magnetoresistive Sensor ICs, Nanopower Series. These two sensors, SM351LT and SM353LT are designed to accommodate a wide range of applications with large air gaps, small magnetic fields and lower power requirements. They respond to either a North or South pole applied in a direction parallel to the sensor and do not require a pull-up resistor.

Honeywell’s new Nanopower Series is available in two magnetic sensitivities:

  • Ultra-high sensitivity SM351LT:  7 Gauss typical operate, 11 Gauss maximum operate, very low current draw (360 nA typical)
  • Very high sensitivity SM353LT:  14 Gauss typical operate, 20 Gauss maximum operate, very low current draw (310 nA typical)

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


  • 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


  • Exercise equipment
  • Infusion pumps
  • Drawer position sensing (e.g., medical cabinets)
  • Hospital beds


  • Refrigerators, Microwaves, Dishwashers
  • Lid, door and drawer position detection
  • Fluid flow


  • Battery-optimization position sensor