FIFO Memory

FIFO memory are integrated circuits (ICs) that buffers and stores data. All memory chips have input and outputs. FIFO chips store this data in a memory stack with a "First-In First-Out" style. This means that the data that is stored first is removed first. FIFO depth is the term given to the amount of memory that can be stored.


FIFO memory is used for buffering applications or when data needs to be stored temporarily. This is ideal for high speed communications which could lose data.


FIFO inputs and outputs can be unidirectional or bidirectional. This will depend on the device. They can also feature programmable flags.


Things to consider when choosing FIFO memory:


  • Density

  • Memory Size

  • Bits per word

  • Supply voltage

  • Operating temperature

  • Package Type

  • Mounting Type

FIFO memory chips come in a standard semiconductor package, such as an LQFP, PLCC or SOIC.


Where is FIFO used?


  • Cameras

  • Multimedia

  • TVs

  • Computers

  • Disk Controllers

  • Communications

  • Networking

What is synchronous FIFO?


A synchronous FIFO is where the reading and writing function is carried out by the same clock. Therefore an asynchronous FIFO uses different clocks for reading and writing.

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Description Price Memory Size Organisation Data Bus Width Bus Directional Access Time Configuration Clock Frequency Mounting Type Package Type Pin Count Expansion Support Dimensions Length Width
RS Stock No. 146-0759
Mfr. Part No.AL422B-PBF
BrandAverLogic
$16.708
Each (In a Tube of 25)
units
3Mbit 384k x 8 8bit Uni-Directional 15 ns Single 50MHz Surface Mount SOP 28 - - - -
RS Stock No. 749-6657
Mfr. Part No.AL422B-PBF
BrandAverLogic
$18.39
Each
units
3Mbit 384k x 8 8bit Uni-Directional 15 ns Single 50MHz Surface Mount SOP 28 - - - -
RS Stock No. 687-7727
Mfr. Part No.FT245BL
BrandFTDI Chip
$10.00
Each
units
- - 8bit Bi-Directional - Single - Surface Mount LQFP 32 - 7 x 7 x 1.4mm 7mm 7mm
RS Stock No. 170-9071
Mfr. Part No.FT245BL
BrandFTDI Chip
$4.79
Each (On a Reel of 1000)
units
- - 8bit Bi-Directional - Single - Surface Mount LQFP 32 - 7 x 7 x 1.4mm 7mm 7mm
RS Stock No. 687-7718
Mfr. Part No.FT245RQ
BrandFTDI Chip
$7.57
Each
units
- - - Bi-Directional - Single 12MHz Surface Mount QFN 32 - 5 x 5 x 0.9mm 5mm 5mm
RS Stock No. 714-4927
Mfr. Part No.IDT7204L15SOGI
BrandIDT
$24.99
Each
units
36kbit 4K x 9 bit 9bit Bi-Directional - Dual - Surface Mount SOIC 28 Yes 17.9 x 8.4 x 2.62mm 17.9mm 8.4mm
RS Stock No. 170-2096
Mfr. Part No.IDT7204L15SOGI
BrandIDT
$24.03
Each (In a Tube of 26)
units
36kbit 4K x 9 bit 9bit Bi-Directional - Dual - Surface Mount SOIC 28 Yes 17.9 x 8.4 x 2.62mm 17.9mm 8.4mm
RS Stock No. 170-9069
Mfr. Part No.FT245RQ
BrandFTDI Chip
$3.864
Each (On a Reel of 6000)
units
- - - Bi-Directional - Single 12MHz Surface Mount QFN 32 - 5 x 5 x 0.9mm 5mm 5mm
RS Stock No. 714-4930
Mfr. Part No.IDT7206L15JG
BrandIDT
$53.39
Each
units
144kbit 16K x 9 bit 9bit Bi-Directional - Dual - Surface Mount PLCC 32 Yes 13.97 x 11.43 x 2.79mm 13.97mm 11.43mm
New
RS Stock No. 217-3697
Mfr. Part No.7201LA15JGI
$14.30
Each
units
4.6Mbit 512K x 9 9bit Bi-Directional 15 ns Single - - PLCC 32 - - - -
RS Stock No. 170-2097
Mfr. Part No.IDT7206L15JG
BrandIDT
$45.02
Each (In a Tube of 32)
units
144kbit 16K x 9 bit 9bit Bi-Directional - Dual - Surface Mount PLCC 32 Yes 13.97 x 11.43 x 2.79mm 13.97mm 11.43mm
RS Stock No. 714-4918
Mfr. Part No.IDT7204L12SOG
BrandIDT
$27.97
Each
units
36kbit 4K x 9 bit 9bit Bi-Directional - Dual - Surface Mount SOIC 28 Yes 17.9 x 8.4 x 2.62mm 17.9mm 8.4mm
RS Stock No. 170-2098
Mfr. Part No.IDT72V04L25JGI
BrandIDT
$22.14
Each (In a Tube of 27)
units
36kbit 4K x 9 bit 9bit Bi-Directional - Dual - Surface Mount PLCC 32 Yes 13.97 x 11.43 x 2.79mm 13.97mm 11.43mm
New
RS Stock No. 217-3696
Mfr. Part No.7201LA15JGI
$12.699
Each (In a Tube of 32)
units
4.6Mbit 512K x 9 9bit Bi-Directional 15 ns Single - - PLCC 32 - - - -
New
RS Stock No. 217-3698
Mfr. Part No.7208L20JG
$94.148
Each (In a Tube of 32)
units
576kbit 64K x 9 9bit Bi-Directional 20 ns Single - - PLCC 32 - - - -
RS Stock No. 170-2095
Mfr. Part No.IDT7204L12JG
BrandIDT
$21.80
Each (In a Tube of 32)
units
36kbit 4K x 9 bit 9bit Bi-Directional - Dual - Surface Mount PLCC 32 Yes 13.97 x 11.43 x 2.79mm 13.97mm 11.43mm
RS Stock No. 714-4879
Mfr. Part No.IDT7201LA12PDG
BrandIDT
$14.52
Each
units
4kbit 512 x 9 bit 9bit Bi-Directional - Dual - Through Hole PDIP 28 Yes 36.6 x 15.24 x 3.8mm 36.6mm 15.24mm
RS Stock No. 714-4911
Mfr. Part No.IDT7203L12TPG
BrandIDT
$20.38
Each
units
18kbit 2K x 9 bit 9bit Bi-Directional - Dual - Through Hole PDIP 28 Yes 34.3 x 7.62 x 3.3mm 34.3mm 7.62mm
RS Stock No. 170-2082
Mfr. Part No.IDT7200L15SOGI
BrandIDT
$13.314
Each (In a Tube of 26)
units
2kbit 256 x 9 bit 9bit Bi-Directional - Dual - Surface Mount SOIC 28 Yes 17.9 x 8.4 x 2.62mm 17.9mm 8.4mm
RS Stock No. 714-4867
Mfr. Part No.IDT7200L15SOGI
BrandIDT
$16.04
Each
units
2kbit 256 x 9 bit 9bit Bi-Directional - Dual - Surface Mount SOIC 28 Yes 17.9 x 8.4 x 2.62mm 17.9mm 8.4mm