Honeywell offers the SL353 Series Micropower Omnipolar Digital Hall-Effect Sensor ICs that are operated by the magnetic field from a permanent magnet or an electromagnet. These devices are small, versatile and provide low-power sensing for a variety of battery-operated and mobile equipment. Since Honeywell's SL353 Digital Hall-Effect Sensor ICs respond to North or South poles, it is not necessary to identify the sensor's magnet polarity, which reduces system costs and allows easier installation. Honeywell's SL353 Series sensors also offer energy efficiency with a supply voltage as low as 2.2 Vdc, push-pull output that doesn't require an external pull-up resistor, non-chopper stabilization design which eliminates noise, and two duty cycle configurations, the SL353HT and SL353LT, that offer a high and low duty cycle, respectively, to accommodate applications with high and low switching speeds. These sensitive devices also use BiCMOS (Bipolar Complementary Metal Oxide Semiconductor) technology and a timing circuit that monitors the amount of time the sensor is on, significantly reducing average current consumption.

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