The S-5711A Series, developed by CMOS technology, is a Hall IC with a high-sensitivity and operates on a low current. The output voltage changes when the S-5711A Series detects the intensity level of flux density. Using the S-5711A Series with a magnet makes it possible to detect the open/close state in various devices. High-density mounting is possible by using the super-small SNT-4A, SOT23-3 packages. Also, the S-5711A Series is the most suitable for portable devices due to the low current consumption.