The SL353 series of micropower omnipolar digital hall-effect sensor ICs from Honeywell utilise a BiCMOS IC design to add performance and functionality, in addition to reducing the size of the IC. According to the company, the low supply voltage for the sensor ICs, combined with low average current, reduces power consumption and promotes energy efficiency. The product is available in two duty cycle configurations to accommodate a variety of low-power applications. The SL353HT IC has a high duty cycle and a low current drain for use in energy-efficient products. The SL353LT IC's low duty cycle and low current drain makes it suitable for battery-operated, mobile applications.
The ICs' built-in timing circuitry turns the power on to the IC for a short time, thereby reducing the average current consumption. The push-pull output does not require an external pull-up resistor, and simplifies the interface with common electrical circuits. The non-chopper stabilized design means that no filter is needed to compensate for the noise generated by this technique. The ICs operate over a temperature range from -40 to +85°C.
The sensors can be operated by a north or a south pole, and do not require the magnet polarity to be identified. The SOT-23 subminiature package size allows the use of the ICs in small assemblies. The sensor ICs are suitable for battery-operated, mobile devices such as door or lid closure detection in notebooks, scanners, hand-held industrial computers or instrumentation; mobile printer head position sensing; hand-held medical or dental equipment; battery-operated infusion pumps, insulin pumps or other wearable medical devices; trigger switches for battery-operated hand tools; reed switch replacement in battery-operated security systems; magnetic encoders for building access; power switch or open-close detection in battery-operated appliances; and gas or water consumption measurement in remote, battery-operated utility meters.
