Honeywell SL353HT

Micropower Omnipolar Digital Hall- effect Sensor ICs, SL353 Series, are small, and versatile, digital Hall- effect devices operated by the magnetic field from a permanent magnet or an electromagnet. These sensitive devices are designed to meet a wide range of potential applications with low power requirements including battery- operated equipment. The SL353 Series devices respond to either a North or South Pole, meaning that they do not require the magnet polarity to be identified, providing an easier installation and potentially reducing system cost. These low- power sensing devices use BiCMOS (Bipolar Complementary Metal Oxide Semiconductor) technology and a timing circuit that turns the power on for only a short time - it is off for the rest of the period (duty cycle) - significantly reducing the average current consumption. Micropower omnipolar digital Hall- effect sensor ICs can operate from a supply voltage as low as 2.2V, promoting energy efficiency. The push- pull output does not require a pull- up resistor and can operate with very low current levels, potentially helping to reduce cost and minimizing the total current consumption. The SL353 Series is available in two duty cycle configurations to accommodate a variety of application needs: SL353HT: High duty cycle 13% typ.) for applications requiring high switching speed and a lower current (0.33 mA typ.) than standard Hall- effect sensor ICs. SL353LT: Very low duty cycle 0.013% typ.) resulting in extended battery life in applications requiring extremely low current drain 1.8μA typ.) and not requiring a high switching speed. The SL353 Series has a typical operating point of ± 60 Gaus at 25°C [77 F] These sensors are available in a subminiature SOT- 23 surface mount package on tape and reel (3000 units per reel), for use in automated pick- and- place component installation.

• VERSATILE: Omnipolar capability with high- duty and low- duty cycle options allows for use in a variety of potential applications with low power requirements and/or battery operations.
• STABLE: Thermally balanced integrated circuit provides for stable operation over a wide temperature range, from - 40°C to 85°C [- 40°F to 185°F].
• PRICE COMPETITIVE: By using BiCMOS technology, Honeywell has been able to design a full- featured integrated circuit with reduced size, saving on manufacturing costs, and resulting in more economical pricing to customers.
• HELPS REDUCE TOTAL SYSTEM COST: SL353 Series Hall- effect sensor ICs can be operated by a North Pole or a South Pole. They do not require the magnet polarity to be identified, thus making the installation easier and potentially reducing the system cost.
• REDUCES MANUFACTURING COSTS: SL353 Series is supplied on tape and reel, allowing for automated, pick- and- place assembly which can help the customer reduce manufacturing costs.
• DOES NOT REQUIRE EXTERNAL COMPONENTS: The push- pull output does not require a pull- up resistor, potentially helping to reduce component and PCB (Printed Circuit Board) cost.
• ROHS- COMPLIANT MATERIALS MEET DIRECTIVE 2002/95/EC

• BATTERY- OPERATED, MOBILE EQUIPMENT:
  • Door or lid closure detection in computer notebooks, scanners, hand- held industrial computers and instrumentation
  • Mobile printer head position sensing
  • Small, hand- held medical and dental equipment
  • Trigger switch for battery- operated hand tools (e.g. drills, drivers)
  • Reed switch replacement in battery- operated security systems
  • Magnetic encoder for building access (array)
  • Power switch or open- close detection in small battery- operated appliances (e.g. vacuum cleaners, fans)
  • Gas or water consumption measurement in remote, battery- operated utility meters