SRAM

SRAM stands for Static Random Access Memory and is a type of semiconductor memory that uses bistable latching circuitry (flip-flop) to store each bit. It holds data bits in its memory so long as power is being supplied. It cannot hold data if power is removed. SRAM is used where speed or low power are needed. It’s higher density than DRAM, and less complicated structure makes it ideal to use in semiconductor memory scenarios where high capacity memory is used as seen in the working memory within computers.

SRAM is different to DRAM (dynamic RAM, which stores bits in cells consisting of a capacitor and a transistor), due to the fact that SRAM does not have to be refreshed unlike Dynamic which will lose data unless refreshed periodically. Also SRAM is faster and more expensive than DRAM.

SRAM is used for a computer’s cache memory as well as being part of the RAM digital to analogue converter found on a video card. SRAM can be designed with a general CMOS technology process with six transistors (6T memory cell) and no capacitors. Since transistors do not require power to prevent leakage, SRAM does not have to be refreshed on a regular basis:

Features

  • Data is held statically – data is held in the semiconductor memory, no need to refresh data after every read data operation as long as the power is applied to the memory
  • Three operational states which are hold, write and read
  • Bistable (cross-coupled) INVs for storage
  • Access transistors MAL and MAR – access to stored data for read and write
  • Word line, WL, controls access – WL=0 (hold operation), WL=1 (read/write operation)
  • Long data lifetime

Applications

  • Computers
  • Workstations
  • Routers
  • LCD screens and printers
  • Electronics
  • Microprocessors

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Description Price Memory Size Organisation Number of Words Number of Bits per Word Maximum Random Access Time Address Bus Width Clock Frequency Low Power Timing Type Mounting Type Package Type Pin Count Dimensions Height
New
RS Stock No. 217-3679
Mfr. Part No.71321SA55JG8
kr 70,362
Each (On a Reel of 400)
Units
16kbit 2K x 8 2K 8bit 55ns - - - - - - - - -
RS Stock No. 126-6973
Mfr. Part No.R1LV5256ESP-5SI#B0
kr 33,50
Each
Units
256kbit 32K words x 8 bit 32K 8bit 55ns 15bit - Yes - Surface Mount SOP 28 11.9 x 8.1 x 1mm 1mm
RS Stock No. 126-6968
Mfr. Part No.R1LV1616HBG-4SI#B0
kr 374,27
Each
Units
16Mbit 1M x 16 bit 1M 16bit 45ns 20bit - Yes - Surface Mount FBGA 48 8 x 9.5 x 0.9mm 0.9mm
New
RS Stock No. 217-3689
Mfr. Part No.71V416S10PHG
kr 43,48
Each (In a Pack of 2)
Units
4Mbit 256K x 16 256K 16bit 10ns - - - - - - - - -
RS Stock No. 126-6969
Mfr. Part No.R1LV1616HSA-4SI#B1
kr 479,56
Each
Units
16Mbit 1M words x 16 bit, 2M words x 8 bit 1M, 2M 8 bit, 16 bit 45ns 19 bit, 20 bit - Yes - Surface Mount TSOP 48 18.5 x 12.1 x 1.05mm 1.05mm
New
RS Stock No. 217-3680
Mfr. Part No.71321SA55JG8
kr 95,39
Each
Units
16kbit 2K x 8 2K 8bit 55ns - - - - - - - - -
RS Stock No. 126-6974
Mfr. Part No.R1WV6416RSA-5SI#B0
kr 720,63
Each
Units
64Mbit 4M words x 16 bit, 8M words x 8 bit 4M, 8M 8 bit, 16 bit 55ns 21 bit, 22 bit - Yes - Surface Mount TSOP 48 18.5 x 12.1 x 1mm 1mm
New
RS Stock No. 217-3687
Mfr. Part No.71V416S10PHGI
kr 69,14
Each (In a Pack of 2)
Units
4Mbit 256K x 16 256K 16bit 10ns - - - - - - - - -
RS Stock No. 901-5821
Mfr. Part No.R1LV0208BSA-5SI#B0
kr 71,98
Each
Units
2Mbit 256K x 8 bit 256K 8bit 55ns 8bit 1MHz Yes - Surface Mount TSOP 32 11.9 x 8.1 x 1mm 1mm
New
RS Stock No. 217-3644
Mfr. Part No.7024L15PFG
kr 283,101
Each (In a Tray of 45)
Units
64kbit 4K x 16 4K 16bit 15ns - - - - - - - - -
RS Stock No. 901-5799
Mfr. Part No.R1LV1616HSA-5SI#B0
kr 381,02
Each
Units
16Mbit 1M x 16 bit 1M 16bit 55ns - - Yes Asynchronous Surface Mount TSOP 48 18.5 x 12.1 x 1mm 1mm
RS Stock No. 901-5733
Mfr. Part No.R1RP0408DGE-2LR#B0
kr 152,43
Each
Units
4Mbit 512K x 8 bit 512K 8bit 12ns 8bit 1MHz - - Surface Mount SOJ 36 23.62 x 10.29 x 2.75mm 2.75mm
RS Stock No. 901-5755
Mfr. Part No.R1RP0416DSB-2PR#D0
kr 172,26
Each
Units
4Mbit 256K x 16 bit 256K 16bit 12ns 16bit 1MHz - - Surface Mount TSOP 44 18.51 x 10.26 x 1mm 1mm
New
RS Stock No. 217-7880
Mfr. Part No.71016S15PHGI
kr 23,876
Each (In a Tube of 26)
Units
1Mbit 64K x 16 64K 16bit 12ns - - - - - - - - -
New
RS Stock No. 217-3650
Mfr. Part No.70V24L15PFG
kr 314,80
Each
Units
64kbit 4K x 16 4K 16bit 15ns - - - - - - - - -
RS Stock No. 901-5764
Mfr. Part No.R1RW0408DGE-2LR#B0
kr 191,82
Each
Units
4Mbit 512K x 8 bit 512K 8bit 12ns 8bit 1MHz - - Surface Mount SOJ 36 23.62 x 10.29 x 3.05mm 3.05mm
RS Stock No. 901-5795
Mfr. Part No.R1LV1616HSA-4SI#B0
kr 438,78
Each
Units
16Mbit 2M x 8 bit 2M 8bit 45ns - - Yes Asynchronous Surface Mount TSOP 48 18.5 x 12.1 x 1mm 1mm
RS Stock No. 126-6981
Mfr. Part No.RMLV0816BGBG-4S2#AC0
kr 150,25
Each
Units
8Mbit 512k x 16 bit 512k 16bit 45ns 19bit - Yes - Surface Mount FBGA 48 7.58 x 8.58 x 0.8mm 0.8mm
RS Stock No. 901-5830
Mfr. Part No.RMLV0408EGSB-4S2#AA0
kr 93,31
Each
Units
4Mbit 512K x 8 bit 512K 8bit 45ns 8bit 1MHz Yes - Surface Mount TSOP 32 11.9 x 8.1 x 1mm 1mm
New
RS Stock No. 217-3663
Mfr. Part No.70V27L20PFGI
kr 681,18
Each
Units
512kbit 32K x 16 32K 16bit 20ns - - - - - - - - -