This part is a kind of semiconductor called 25Q40BV.

Function of this product has 4M-BIT SERIAL FLASH MEMORY.

Manufacturers : Winbond

Image and pinout :

Some of the text within the PDF file :

W25Q40BV 4M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI Publication Release Date: May 04, 2012 - 1 - Revision C W25Q40BV Table of Contents 1. GENERAL DESCRIPTION ... 5 2. FEATURES... 5 3. PACKAGE TYPES 6 3.1 Pin Configuration SOIC /VSOP 150-mil, SOIC 208-mil 6 3.2 Pad Configuration WSON 6X5-mm, USON 2X3-mm .. 6 3.3 Pi [ ... ]

25Q40BV PDF Datasheet Download