US1881

The US1881 is the industry's first Hall integrated circuit in a SOT-23 package. The US1881 is a bipolar Hall effect sensor IC fabricated from mixed signal CMOS technology. It incorporates advanced chopper stabilization techniques to provide accurate and stable magnetic switch points. There are many applications for this HED US1881 in addition to those listed above. The design, specifications and performance have been optimized for commutation applications in
5V and 12V brushless DC motors.

The output transistor of US1881 will be latched on (BOP) in the presence of a sufficiently strong South pole magnetic field facing the marked side of the package. Similarly, the output will be latched off (BRP) in the presence of a North field.

The SOT-23 device US1881 is reversed from the UA package. The SOT-23 output transistor will be latched on in the presence of a sufficiently strong North pole magnetic field applied to the marked face.