This part is a kind of semiconductor called AT45DB041E.

Function of this product has 1.65V Minimum SPI Serial Flash Memory.

Manufacturers : Adesto

Image and pinout :

Some of the text within the PDF file :

AT45DB041E 4-Mbit DataFlash (with Extra 128-Kbits), 1.65V Minimum SPI Serial Flash Memory Features  Single 1.65V - 3.6V supply  Serial Peripheral Interface (SPI) compatible       Supports SPI modes 0 and 3 Supports RapidS™ operation Continuous read capability through entire array  Up to 85MHz  Low-power read option up to 15 MHz  Clock-to-output time (tV) of 6ns maximum User configurable page size  256 bytes per page  264 bytes per page (default)  Page size can be factory pre-configured for 256 bytes Two fully independent SRAM data buffers (256/264 bytes)  Allows receiving data while reprogramming the main memory array Flexible programming options  Byte/Page Program (1 to 256/264 bytes) directly into main memory  Buffer Write  B [ ... ]

AT45DB041E PDF Datasheet Download