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/Winbond W25X40CLSNIG 2.5/3/3.3 V 4Mbit Serial Flash Memoery With

Winbond W25X40CLSNIG 2.5/3/3.3 V 4Mbit Serial Flash Memoery With

4KB SECTORS AND DUAL I/O SPI
The W25X40CL supports standard SPI and Dual SPI operation. Standard SPI instructions use the 
unidirectional DI (input) pin to serially write instructions, addresses or data to the device on the rising 
edge of the Serial Clock (CLK) input pin. Standard SPI also uses the unidirectional DO (output) to read 
data or status from the device on the falling edge of CLK.
  • Brand:

    Winbond
  • Product Details
GENERAL DESCRIPTION

The W25X40CL (4M-bit) Serial Flash memories provides a storage solution for systems with limited 
space, pins and power. The 25X series offers flexibility and performance well beyond ordinary Serial 
Flash devices. They are ideal for code download applications as well as storing voice, text and data. 
The devices operate on a single 2.3V to 3.6V power supply with current consumption as low as 1mA
active and 1µA for power-down. All devices are offered in space-saving packages.

The W25X40CL arrays are organized into 2048 programmable pages of 256-bytes each. Up to 256 
bytes can be programmed at a time. The W25X40CL have 128 erasable sectors, 16 erasable 32KB 
blocks and 8 erasable 64KB blocks respectively. The small 4KB sectors allow for greater flexibility in 
applications that require data and parameter storage. (See figure 2.)

The W25X40CL support the standard Serial Peripheral Interface (SPI), and a high performance dual 
output as well as Dual I/O SPI: Serial Clock, Chip Select, Serial Data DI (I/O0), DO (I/O1). SPI clock 
frequencies up to 104MHz are supported allowing equivalent clock rates of 208MHz when using the 
Fast Read Dual Output instruction. These transfer rates are comparable to those of 8 and 16-bit 
Parallel Flash memories. The Continuous Read Mode allows for efficient memory access with as few 
as 16-clocks of instruction-overhead to read a 24-bit address, allowing true XIP (execute in place) 
operation.

A Hold pin, Write Protect pin and programmable write protect, with top or bottom array control 
features, provide further control flexibility. Additionally, the device supports JEDEC standard 

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


FEATURES

 Family of Serial Flash Memories
– W25X40CL: 4M-bit/512K-byte (524,288) – 256-bytes per programmable page
– Uniform erasable 4KB, 32KB & 64KB regions.
 SPI with Single / Dual Outputs / I/O
– Standard SPI: CLK, /CS, DI, DO, /WP, /Hold
– Dual SPI: CLK, /CS, IO0, IO1, /WP, /Hold
 Data Transfer up to 208M-bits / second
– Clock operation to 104MHz
–208MHz equivalent Dual SPI – Auto-increment Read capability
 Efficient “Continuous Read Mode”
– Low Instruction overhead
– Continuous Read
– As few as 16 clocks to address memory
– Allows true XIP (execute in place) operation
 Flexible Architecture with 4KB sectors
– Uniform Sector/Block Erase (4/32/64-kbytes)
– Page program up to 256 bytes <1ms
– More than 100,000 erase/write cycles
– More than 20-year data retention
 Low Power, Wide Temperature Range 
– Single 2.3V to 3.6V supply
– 1mA active current, <1µA Power-down(typ.)
– -40° to +85°C operating range
 Space Efficient Packaging
– 8-pin SOIC 150-mil / VSOP 150-mil
– 8-pin SOIC 208-mil
– 8-pin PDIP 300-mil
– 8-pad WSON 6x5-mm – 8-pad USON 2x3-mm
– 8-pin PDIP 300-mil
– Contact Winbond for KGD and other options

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