Flash Memory

Flash memory is a type of non-volatile memory storage. This means that it can be electrically erased and programmed at byte-level, and it retains data regardless of a power source. Flash memory ICs are used within circuits to add data storage to an application.

Flash memory is a type of EEPROM (Electronically Erasable Programmable Read-Only Memory). EEPROM ICs can erase any byte of memory, which flash memory erases chunks or blocks of memory at a time. Flash memory does have a limited life in terms of the number of write cycles and tends to be used for programmed storage that is infrequently changed.

The memory size of a flash device refers to the capacity for data storage. This is often given in Mbit or MB.

You can learn more in our comprehensive guide to flash memory.

How does flash memory work?

Flash memory ICs work by retaining small parts of electricity between its transistors, allowing information to be stored with or without power. Flash stores data even when the power is switched off. Unlike RAM which loses data when the power is switched off.

What is flash memory used for?

Flash memory ICs are used in digital cameras, smartphones, computers, solid-state drives (SSD) and video game consoles. Flash memory is also found in scientific, medical and industrial applications.

What is the difference between NOR flash and NAND flash?

NOR

  • NOR flash memory provides a faster speed as possessing random access capabilities, a good choice for mobile devices as it is suitable to store large quantities of code.
  • The erase and write function is slower than NAND.
  • Hosts a larger memory cell size than NAND.
  • Limiting scaling capabilities make bit density achievable.

NAND

  • Provides fast rewritable and erase capabilities but is a little slower than NOR within the read speed.
  • NAND flash memory is a popular choice for those needing a flash drive for digital video, data storage and music. This is because of NAND's high speed and high capacity alongside being a flash memory that is cheap as the cost per bit is generally lower.
  • Quickly re-write data, over and over again.
  • Stores a large quantity of data and commonly used for USB sticks, smartphones and cameras.

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Description Price Memory Size Interface Type Package Type Pin Count Organisation Mounting Type Cell Type Minimum Operating Supply Voltage Maximum Operating Supply Voltage Block Organisation Length Height Width Dimensions
RS Stock No. 805-1315
Mfr. Part No.LE25U40CMC-AH
£0.362
Each (On a Tape of 20)
Units
4Mbit SPI SOP J 8 512K x 8 bit Surface Mount - 2.3 V 3.6 V Symmetrical - - - 4.9 x 3.9 x 1.5mm
RS Stock No. 177-5266
Mfr. Part No.S25FL256SAGMFI001
£3.04
Each (In a Tube of 47)
Units
256Mbit SPI SOIC 16 128M x 2 bit, 256M x 1 bit, 64M x 4 bit Surface Mount NOR 2.7 V 3.6 V - - - - 10.3 x 7.5 x 2.55mm
RS Stock No. 171-1476
Mfr. Part No.S29GL064N90TFI040
£2.602
Each (In a Tray of 96)
Units
64Mbit CFI, Parallel TSOP 48 4M x 16 bit, 8M x 8 bit Surface Mount NOR 2.7 V 3.6 V - - - - 18.5 x 12.1 x 1.05mm
RS Stock No. 168-7918
Mfr. Part No.AT25SF041-SHD-B
£0.251
Each (In a Tube of 90)
Units
4Mbit SPI SOIC 8 512K x 8 Surface Mount - 2.5 V 3.6 V - - - - 5.4 x 5.35 x 1.91mm
RS Stock No. 125-5261
Mfr. Part No.S29GL064N90TFI040
£2.694
Each (In a Pack of 5)
Units
64Mbit CFI, Parallel TSOP 48 4M x 16 bit, 8M x 8 bit Surface Mount NOR 2.7 V 3.6 V - - - - 18.5 x 12.1 x 1.05mm
RS Stock No. 723-8864
Mfr. Part No.SST25VF016B-75-4I-QAF-T
BrandMicrochip
£1.77
Each (In a Pack of 2)
Units
16Mbit SPI WSON 8 2M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical 6mm 0.75mm 5mm 6 x 5 x 0.75mm
RS Stock No. 124-2649
Mfr. Part No.S25FL256SAGMFI001
£3.425
Each (In a Pack of 2)
Units
256Mbit SPI SOIC 16 128M x 2 bit, 256M x 1 bit, 64M x 4 bit Surface Mount NOR 2.7 V 3.6 V - - - - 10.3 x 7.5 x 2.55mm
RS Stock No. 822-8486
Mfr. Part No.AT25SF041-SHD-B
£0.268
Each (In a Pack of 10)
Units
4Mbit SPI SOIC 8 512K x 8 Surface Mount - 2.5 V 3.6 V - - - - 5.4 x 5.35 x 1.91mm
RS Stock No. 170-9134
Mfr. Part No.A25L020CO-F
£0.578
Each (In a Tube of 100)
Units
2Mbit SPI SOP 8 256K x 8 bit Surface Mount - 2.7 V 3.6 V - - - - 5.33 x 5.38 x 1.91mm
RS Stock No. 823-4305
Mfr. Part No.SST25VF080B-50-4I-QAF
BrandMicrochip
£0.928
Each (In a Pack of 5)
Units
8MB SPI WSON 8 1M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 6 x 5 x 0.75mm
RS Stock No. 869-6185
Mfr. Part No.SST26VF032BA-104I/SM
BrandMicrochip
£1.27
Each (In a Pack of 5)
Units
32Mbit SPI SOIJ 8 4M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 5.26 x 5.25 x 1.98mm
RS Stock No. 124-9979
Mfr. Part No.LE25U40CMC-AH
£0.288
Each (On a Reel of 2000)
Units
4Mbit SPI SOP J 8 512K x 8 bit Surface Mount - 2.3 V 3.6 V Symmetrical - - - 4.9 x 3.9 x 1.5mm
RS Stock No. 869-6205
Mfr. Part No.SST26VF064B-104I/MF
BrandMicrochip
£2.035
Each (In a Pack of 2)
Units
64Mbit SPI WDFN 8 8M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 6 x 5 x 0.75mm
RS Stock No. 165-4124
Mfr. Part No.SST26VF032BA-104I/SM
BrandMicrochip
£1.16
Each (In a Tube of 90)
Units
32Mbit SPI SOIJ 8 4M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 5.26 x 5.25 x 1.98mm
RS Stock No. 146-0301
Mfr. Part No.SST26VF064B-104I/MF
BrandMicrochip
£1.87
Each (In a Tube of 98)
Units
64Mbit SPI WDFN 8 8M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 6 x 5 x 0.75mm
RS Stock No. 802-2695
Mfr. Part No.A25L020CO-F
£0.636
Each (In a Pack of 10)
Units
2Mbit SPI SOP 8 256K x 8 bit Surface Mount - 2.7 V 3.6 V - - - - 5.33 x 5.38 x 1.91mm
RS Stock No. 144-9114
Mfr. Part No.SST25PF040C-40I/MF
BrandMicrochip
£0.589
Each (In a Tube of 98)
Units
4Mbit SPI WDFN 8 512K x 8 bit Surface Mount Split Gate 2.3 V 3.6 V - - - - 6 x 5 x 0.72mm
RS Stock No. 822-8489
Mfr. Part No.AT45DB041E-SHN-B
£0.872
Each (In a Pack of 5)
Units
4Mbit SPI SOIC 8 2048 pages x 256 bytes Surface Mount - 1.65 V 3.6 V - - - - 5.4 x 5.35 x 1.91mm
RS Stock No. 824-3078
Mfr. Part No.SST25VF040B-50-4I-SAF
BrandMicrochip
£0.653
Each (In a Pack of 10)
Units
4Mbit SPI SOIC 8 512K x 8 Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 5 x 4 x 1.5mm
RS Stock No. 173-2858
Mfr. Part No.AT45DB041E-SHN-B
£0.679
Each (On a Reel of 2000)
Units
4194304bit SPI SOIC 8 2048 pages x 256 bytes Surface Mount - 1.65 V 3.6 V - - - - 5.4 x 5.35 x 1.91mm