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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 devices operate on a single 2.7V to 3.6V power supply with current consumption as low as 5mA active and 1μA for power-down. All devices offered in space-saving packages.  
SPI Flash Part Numbering System_rev05
Serial Flash 3V
Den Gen Feature Part Number Voltage Temp. Range
Data Speed PKG(mm/mil) Function

16Mb

1st

Single,
Dual,
Quad

FM25Q16A

2.7V
~3.6V
0℃~70℃,

-25℃~85℃,

-40℃~85℃,
104MHz
clock operation,
208MHz equivalent Dual SPI,
416MHz equivalent Quad SPI
KGD,
8 Contact 4x4
USON 0.55t 0.4ld,
8 Pin 208 mil SOIC,
16 Pin 300 mil SOIC,
8 Pin 300 mil PDIP,
8 Contact 6x5 WSON,
8 Pin 150 mil SOIC,
8 Contact 8x6 WSON,
8 Pin VSOP,
24ball TFBGA,
9 Contact 6x5 WSON,
8 Contact 3x2 USON 0.55t 0.35ld,
8 Contact 3x2
USON 0.55t 0.45ld,
8 Contact 3x3
USON 0.55t 0.4ld,
8 Contact 3x4
USON 0.55t 0.6ld,
8 Contact 3x2
USON 0.45t 0.45ld,
8 Contact 3x4
USON 0.45t 0.6ld,
8 Contact 4x4
USON 0.45t 0.4ld,
Bumped Wafer
WLCSP
Uniform Sector Erase (4K-byte)
Uniform Block Erase
(32K and 64K-bytes) Erase/Program
Suspend & Resume
Lock-Down and OTP
64Mb 1st FM25Q64A
Serial Flash 1.8V
Den Gen Feature Part Number Voltage Temp. Range
Data Speed PKG(mm/mil) Function
32Mb 2nd Single,
Dual,
Quad,
QPI
FM25M32B 1.65V
~1.95V
0℃~70℃,

-25℃~85℃,

-40℃~85℃,
104MHz
clock operation,
208MHz equivalent Dual SPI,
416MHz equivalent Quad SPI
KGD,
8 Contact 4x4
USON 0.55t 0.4ld,
8 Pin 208 mil SOIC,
16 Pin 300 mil SOIC,
8 Pin 300 mil PDIP,
8 Contact 6x5 WSON,
8 Pin 150 mil SOIC,
8 Contact 8x6 WSON,
8 Pin VSOP,
24ball TFBGA,
9 Contact 6x5 WSON,
8 Contact 3x2 USON 0.55t 0.35ld,
8 Contact 3x2
USON 0.55t 0.45ld,
8 Contact 3x3
USON 0.55t 0.4ld,
8 Contact 3x4
USON 0.55t 0.6ld,
8 Contact 3x2
USON 0.45t 0.45ld,
8 Contact 3x4
USON 0.45t 0.6ld,
8 Contact 4x4
USON 0.45t 0.4ld,
Bumped Wafer
WLCSP
Uniform Sector Erase (4K-byte)
Uniform Block Erase
(32K and 64K-bytes) Erase/Program
Suspend & Resume
Lock-Down and OTP
64Mb 3rd FM25M64C
128Mb 1st FM25M4AA
256Mb
(DDP)
1st FM25M4SA