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. 822-8473
Mfr. Part No.AT25SF041-SSHD-B
£0.229
Each (In a Pack of 10)
Units
4Mbit SPI SOIC 8 512K x 8 Surface Mount - 2.5 V 3.6 V - - - - 5.05 x 3.99 x 1.5mm
RS Stock No. 168-7915
Mfr. Part No.AT25SF041-SSHD-B
£0.209
Each (In a Tube of 98)
Units
4Mbit SPI SOIC 8 512K x 8 Surface Mount - 2.5 V 3.6 V - - - - 5.05 x 3.99 x 1.5mm
RS Stock No. 869-6173
Mfr. Part No.SST26VF032B-104I/SM
BrandMicrochip
£1.195
Each (In a Pack of 2)
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. 165-4188
Mfr. Part No.SST26VF032B-104I/SM
BrandMicrochip
£1.11
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. 165-1987
Mfr. Part No.SST25VF080B-50-4I-S2AF
BrandMicrochip
£0.74
Each (In a Tube of 90)
Units
8Mbit SPI SOIC 8 1M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V - - - - 5.4 x 5.4 x 1.91mm
RS Stock No. 807-3845
Mfr. Part No.SST25VF080B-50-4I-S2AF
BrandMicrochip
£0.792
Each (In a Pack of 10)
Units
8Mbit SPI SOIC 8 1M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V - - - - 5.4 x 5.4 x 1.91mm
RS Stock No. 869-6179
Mfr. Part No.SST26VF064B-104I/SM
BrandMicrochip
£1.88
Each (In a Pack of 2)
Units
64Mbit SPI SOIJ 8 8M 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. 165-4189
Mfr. Part No.SST26VF064B-104I/SM
BrandMicrochip
£1.74
Each (In a Tube of 90)
Units
64Mbit SPI SOIJ 8 8M 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. 822-8470
Mfr. Part No.AT45DB641E-MWHN-Y
£3.55
Each (In a Pack of 2)
Units
69206016bit SPI VDFN 8 32768 pages x 256 bytes Surface Mount - 1.65 V 3.6 V - - - - 8.1 x 6.1 x 0.95mm
RS Stock No. 165-6782
Mfr. Part No.AT45DB641E-MWHN-Y
£2.95
Each (In a Tray of 338)
Units
69206016bit SPI VDFN 8 32768 pages x 256 bytes Surface Mount - 1.65 V 3.6 V - - - - 8.1 x 6.1 x 0.95mm
RS Stock No. 162-8880
Mfr. Part No.LE25U20AMB-AH
£0.226
Each (On a Reel of 2000)
Units
2Mbit SPI SOP-K 8 256K x 8 bit Surface Mount - 2.3 V 3.6 V Symmetrical - - - 4.9 x 3.9 x 1.5mm
RS Stock No. 124-2652
Mfr. Part No.S25FL256SAGNFI000
£3.09
Each (In a Pack of 2)
Units
256Mbit SPI WSON 8 128M x 2 bit, 256M x 1 bit, 64M x 4 bit Surface Mount NOR 2.7 V 3.6 V - - - - 8 x 6 x 0.75mm
RS Stock No. 177-5295
Mfr. Part No.S25FL256SAGNFI000
£2.438
Each (In a Tray of 338)
Units
256Mbit SPI WSON 8 128M x 2 bit, 256M x 1 bit, 64M x 4 bit Surface Mount NOR 2.7 V 3.6 V - - - - 8 x 6 x 0.75mm
RS Stock No. 124-2653
Mfr. Part No.S25FL256SAGNFI001
£2.425
Each (In a Pack of 2)
Units
256Mbit SPI WSON 8 128M x 2 bit, 256M x 1 bit, 64M x 4 bit Surface Mount NOR 2.7 V 3.6 V - - - - 8 x 6 x 0.75mm
RS Stock No. 165-2021
Mfr. Part No.SST39SF020A-70-4C-PHE
BrandMicrochip
£1.10
Each (In a Tube of 11)
Units
2MB Parallel PDIP 32 256K x 8 bit Through Hole Split Gate 4.5 V 5.5 V Symmetrical - - - 42.04 x 13.97 x 3.81mm
RS Stock No. 805-1306
Mfr. Part No.LE25U20AMB-AH
£0.308
Each (On a Tape of 20)
Units
2Mbit SPI SOP-K 8 256K x 8 bit Surface Mount - 2.3 V 3.6 V Symmetrical - - - 4.9 x 3.9 x 1.5mm
RS Stock No. 823-4510
Mfr. Part No.SST39SF020A-70-4C-PHE
BrandMicrochip
£1.21
Each (In a Pack of 5)
Units
2MB Parallel PDIP 32 256K x 8 bit Through Hole Split Gate 4.5 V 5.5 V Symmetrical - - - 42.04 x 13.97 x 3.81mm
RS Stock No. 177-5275
Mfr. Part No.S25FL256SAGNFI001
£2.269
Each (In a Tube of 82)
Units
256Mbit SPI WSON 8 128M x 2 bit, 256M x 1 bit, 64M x 4 bit Surface Mount NOR 2.7 V 3.6 V - - - - 8 x 6 x 0.75mm
RS Stock No. 798-5371
Mfr. Part No.SST25VF016B-50-4C-S2AF
BrandMicrochip
£1.124
Each (In a Pack of 5)
Units
16Mbit SPI SOIC 8 2M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V - - - - 5.4 x 5.4 x 1.91mm
RS Stock No. 178-5020
Mfr. Part No.SST25VF016B-50-4C-S2AF
BrandMicrochip
£1.04
Each (In a Tube of 90)
Units
16Mbit SPI SOIC 8 2M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V - - - - 5.4 x 5.4 x 1.91mm