GENERAL DESCRIPTION
The W25Q40BW (4M-bit) Serial Flash memory provides a storage solution for systems with limited space, pins and power. The 25Q series offers flexibility and performance well beyond ordinary Serial Flash devices. They are ideal for code shadowing to RAM, executing code directly from Dual/Quad SPI (XIP) and storing voice, text and data. The device operates on a single 1.65V to 1.95V power supply with current consumption as low as 4mA active and 1µA for power-down. All devices are offered in space saving packages.

FEATURES
• Family of SpiFlash Memories
   – W25Q40BW: 4M-bit/512K-byte (524,288)
   – 256-byte per programmable page
   – Standard SPI: CLK, /CS, DI, DO, /WP, /Hold
   – Dual SPI: CLK, /CS, IO0, IO1, /WP, /Hold
   – Quad SPI: CLK, /CS, IO0, IO1, IO2, IO3
• Highest Performance Serial Flash
   – 80MHz Dual/Quad SPI clocks
   – 160/320MHz equivalent Dual/Quad SPI
   – 40MB/S continuous data transfer rate
   – Up to 6X that of ordinary Serial Flash
   – More than 100,000 erase/program cycles
   – More than 20-year data retention
• Efficient “Continuous Read Mode”
   – Low Instruction overhead
   – Continuous Read with 8/16/32/64-Byte Wrap
   – As few as 8 clocks to address memory
   – Allows true XIP (execute in place) operation
   – Outperforms X16 Parallel Flash
• Low Power, Wide Temperature Range
   – Single 1.65 to 1.95V supply
   – 4mA active current, <1µA Power-down current
   – -40°C to +85°C operating range
• Flexible Architecture with 4KB sectors
   – Uniform Sector Erase (4K-bytes)
   – Uniform Block Erase (32K and 64K-bytes)
   – Program one to 256 bytes
   – Erase/Program Suspend & Resume
• Advanced Security Features
   – Software and Hardware Write-Protect
   – Top/Bottom, 4KB complement array protection
   – Lock-Down and OTP array protection(1)
   – 64-Bit Unique Serial Number for each device
   – 4X256-Byte Security Registers with OTP locks
   – Volatile & Non-volatile Status Register Bits
• Space Efficient Packaging
   – 8-pin SOIC 150-mil
   – 8-pad WSON 6x5-mm, USON 2x3-mm
   – Contact Winbond for KGD and other options