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. 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. 912-2749
Mfr. Part No.SST39SF010A-70-4I-WHE
BrandMicrochip
£0.762
Each (In a Tray of 208)
Units
1MB Parallel TSOP 32 128K x 8 bit Surface Mount Split Gate 4.5 V 5.5 V Symmetrical - - - 12.5 x 8.1 x 1.05mm
RS Stock No. 824-3066
Mfr. Part No.SST25VF040B-50-4C-S2AF
BrandMicrochip
£0.657
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 - - - 5.4 x 5.4 x 1.91mm
RS Stock No. 165-4167
Mfr. Part No.SST26VF016B-104V/SN
BrandMicrochip
£0.936
Each (In a Tube of 100)
Units
16Mbit SPI SOIC 8 2M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V - - - - 4.9 x 3.9 x 1.25mm
RS Stock No. 723-8849
Mfr. Part No.SST49LF080A-33-4C-NHE
BrandMicrochip
£1.55
Each
Units
8Mbit Parallel PLCC 32 1024K x 8 bit Surface Mount Split Gate 3 V 3.6 V Symmetrical - - - 11.51 x 14.05 x 2.84mm
RS Stock No. 822-8483
Mfr. Part No.AT45DB081E-SHN-B
£1.194
Each (In a Pack of 5)
Units
8650752bit SPI SOIC 8 4096 pages x 256 bytes Surface Mount - 1.7 V 3.6 V - - - - 5.4 x 5.35 x 1.91mm
RS Stock No. 823-4507
Mfr. Part No.SST39SF010A-70-4I-WHE
BrandMicrochip
£0.906
Each (In a Pack of 5)
Units
1MB Parallel TSOP 32 128K x 8 bit Surface Mount Split Gate 4.5 V 5.5 V Symmetrical - - - 12.5 x 8.1 x 1.05mm
RS Stock No. 145-9067
Mfr. Part No.SST25VF040B-50-4C-S2AF
BrandMicrochip
£0.602
Each (In a Tube of 90)
Units
4Mbit SPI SOIC 8 512K x 8 Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 5.4 x 5.4 x 1.91mm
RS Stock No. 145-9474
Mfr. Part No.AT45DB081E-SHN-B
£1.033
Each (In a Tube of 90)
Units
8650752bit SPI SOIC 8 4096 pages x 256 bytes Surface Mount - 1.7 V 3.6 V - - - - 5.4 x 5.35 x 1.91mm
RS Stock No. 905-3117
Mfr. Part No.SST26VF016B-104V/SN
BrandMicrochip
£1.072
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 - - - - 4.9 x 3.9 x 1.25mm
RS Stock No. 168-7914
Mfr. Part No.AT45DB041E-SSHN2B-T
£0.588
Each (On a Reel of 4000)
Units
4194304bit SPI SOIC 8 2048 pages x 256 bytes Surface Mount - 1.65 V 3.6 V - - - - 5.05 x 3.99 x 1.5mm
RS Stock No. 146-0157
Mfr. Part No.SST39VF040-70-4I-NHE
BrandMicrochip
£1.136
Each (In a Tube of 30)
Units
4Mbit Parallel PLCC 32 512K x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 11.51 x 14.05 x 2.84mm
RS Stock No. 159-7485
Mfr. Part No.SST25VF040B-50-4I-S2AE
BrandMicrochip
£0.602
Each (In a Tube of 90)
Units
4Mbit SPI SOIC 8 512K x 8 Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 5.4 x 5.4 x 1.91mm
RS Stock No. 822-8464
Mfr. Part No.AT45DB041E-SSHN2B-T
£0.93
Each (In a Pack of 5)
Units
4194304bit SPI SOIC 8 2048 pages x 256 bytes Surface Mount - 1.65 V 3.6 V - - - - 5.05 x 3.99 x 1.5mm
RS Stock No. 723-8766
Mfr. Part No.SST39VF010-70-4C-NHE
BrandMicrochip
£0.888
Each (In a Pack of 5)
Units
1Mbit Parallel PLCC 32 128K x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 11.51 x 14.05 x 2.84mm
RS Stock No. 869-6182
Mfr. Part No.SST26VF032B-104I/MF
BrandMicrochip
£1.344
Each (In a Pack of 5)
Units
32Mbit SPI WDFN 8 4M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 6 x 5 x 0.75mm
RS Stock No. 146-0156
Mfr. Part No.SST39VF010-70-4C-NHE
BrandMicrochip
£0.778
Each (In a Tube of 30)
Units
1Mbit Parallel PLCC 32 128K x 8 bit Surface Mount Split Gate 2.7 V 3.6 V Symmetrical - - - 11.51 x 14.05 x 2.84mm
RS Stock No. 905-3145
Mfr. Part No.SST26VF064B-104I/MN
BrandMicrochip
£2.30
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 - - - - 6 x 8 x 0.8mm
RS Stock No. 159-7487
Mfr. Part No.SST25VF040B-50-4C-SAF
BrandMicrochip
£0.564
Each (In a Tube of 100)
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. 165-4038
Mfr. Part No.SST26VF064B-104I/MN
BrandMicrochip
£2.04
Each (In a Tray of 480)
Units
64Mbit SPI WDFN 8 8M x 8 bit Surface Mount Split Gate 2.7 V 3.6 V - - - - 6 x 8 x 0.8mm