Unipolar Digital Hall-Effect Sensor ICs SS340RT/SS440R Series DatasheetUnipolar Digital Hall-Effect Sensor ICs The SS340RT/SS440R sensor ICs are small, versatile digital Hall-effect devices that are operated by the magnetic field from a permanent magnet or an electromagnet. They are designed to respond to a single pole: North (SS340RT) or South (SS440R). These unipolar Hall ICs are supplied in three different magnetic sensitivities to meet a wide range of potential applications: SS341RT and SS441R offer the highest sensitivity, with a typical operating point of 75 G at 25 C 77 F . SS343RT and SS443R offer medium sensitivity, with a typical operating point of 135 G at 25 C 77 F . SS349RT and SS449R offer the lowest sensitivity, with a typical operating point of 305 G at 25 C 77 F . These sensors are available in two package styles: The SS340RT is available in the miniature SOT-23 surface mount package. SS440R is available in the leaded, flat TO-92-style package. The SS340RTs small size requires less PC board space, allowing it to be used in smaller assemblies. Its 3 Vdc capability allows for use in low voltage applications, promoting energy efficiency. The SS340RT Series is available on tape and reel (3000 units per reel) the SS440R Series is available in a bulk package (1000 units per bag). SS340RT What makes our sensors better: SS440R Robust IC design with ESD Class 2, reverse polarity protection and 150 C 302 F capability Package and sensitivity options to better match application needs Dependable performance similar Honeywell sensor ICs have been tested to over 100 million operations Honeywell legacy and expertise 45 years of engineering excellence and Hall effect technology experience SMALL VERSATILE sensing.honeywell.com 2