GENERAL DESCRIPTIONS

The W25Q40EW (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 1mA active and 1µA for power-down. All devices are offered in space-saving

packages.

The W25Q40EW array is organized into 2,048 programmable pages of 256-bytes each. Up to 256 bytes

can be programmed at a time. Pages can be erased in groups of 16 (4KB sector erase), groups of 128

(32KB block erase), groups of 256 (64KB block erase) or the entire chip (chip erase). The W25Q40EW

has 128 erasable sectors and 8 erasable blocks respectively. The small 4KB sectors allow for greater

flexibility in applications that require data and parameter storage. (See figure 2.)

The W25Q40EW supports the standard Serial Peripheral Interface (SPI), and a high performance

Dual/Quad output as well as Dual/Quad I/O SPI: Serial Clock, Chip Select, Serial Data I/O0 (DI), I/O1

(DO), I/O2 (/WP), and I/O3 (/HOLD). SPI clock frequencies of up to 104MHz are supported allowing

equivalent clock rates of 208MHz (104MHz x 2) for Dual I/O and 416MHz (104MHz x 4) for Quad I/O when

using the Fast Read Dual/Quad I/O instructions. These transfer rates can outperform standard

Asynchronous 8 and 16-bit Parallel Flash memories.

A Hold pin, Write Protect pin and programmable write protection, with top, bottom or complement array

control, provide further control flexibility. Additionally, the device supports JEDEC standard manufacturer

and device identification with a 64-bit Unique Serial Number.

FEATURES

 Family of SpiFlash Memories

– 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

– QPI: CLK, /CS, IO0, IO1, IO2, IO3

 Highest Performance Serial Flash

– 104MHz Dual/Quad SPI clocks

– 208/416MHz equivalent Dual/Quad SPI

– 50MB/S continuous data transfer rate

– Up to 6X that of ordinary Serial Flash

– Min 100K Program-Erase cycles per sector

– More than 20-year data retention

 Low Power, Wide Temperature Range

– Single 1.65V to 1.95V supply

– 1mA 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 Special OTP array protection

– 64-Bit Unique Serial Number for each device

– Discoverable Parameters (SFDP) Register

– 3X256-Byte Security Registers with OTP locks

– Volatile & Non-volatile Status Register Bits

 Space Efficient Packaging:

– 8-pin SOIC / VSOP 150-mil

– 8-pad WSON 6X5-mm

– USON8 2X3mm / 4x3-mm

– 8-ball WLCSP

– Contact Winbond for KGD and other o