SL353LT - 

Honeywell SL353 Series Digital Hall-effect Sensor
The Sl353 series sensor ICs 9internal circuits) have been designed to offer the user a small, versatile, digital hall0effect device operated by the magnetic field of a permanent magnet or an electromagnet. They have a low power requirement and are sited to many possible applications. They are able to operate from a supply voltage as low as 2.2 V helping with energy efficiency. They can respond to either a North or South pole. This helps reduce instilllation time as the user does not need to identify the magnetic polarity. The SLS353HT has been designed as a High Duty Cycle unit and is ideal for applications requiring a high switching speed and a lower current then standard Hall Effect sensors. The SLS353LT has been designed as a very Low Duty Cycle unit and thus ideal for applications requiring a low switching speed but with a requirement to extend battery life and operate with an extremely low current drain.