This part is a kind of semiconductor called AK8975.

Function of this product has 3-axis Electronic Compass.

Manufacturers : Asahi Kasei Microsystems

Image and pinout :

Some of the text within the PDF file :

[AK8975/C] AK8975/AK8975C 3-axis Electronic Compass 1. Features A 3-axis electronic compass IC with high sensitive Hall sensor technology. Best adapted to pedestrian city navigation use for cell phone and other portable appliance. Functions: • 3-axis magnetometer device suitable for compass application • Built-in A to D Converter for magnetometer data out • 13 bit data out for each 3 axis magnetic components - Sensitivity: 0.3 µT / LSB typ. • Serial interface - I2C bus interface. Standard mode and Fast mode compliant with Philips I2C specification Ver.2.1 - 4-wire SPI • Operation mode: Power-down mode, Single Measurement mode, Self test mode and Fuse access mode. • DRDY function for measurement data ready • Magnetic sensor overflow monitor function • Built-in oscillator [ ... ]

AK8975 PDF Datasheet Download