SM351LT

Honeywell Nanopower Series

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. They 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.

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 flow
•  CONSUMER ELECTRONICS
• •  Battery-optimization position sensor

Features and Benefits

• •  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

Related Product

SM351LT       SM353LT