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
RS Stock No. 188-5328
Mfr. Part No.CY62158ELL-45ZSXI
kr 81,161
Each (In a Tray of 135)
Units
8Mbit 512k x 16 bit 512k 16bit 45ns 8bit 1MHz Yes - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
RS Stock No. 124-2945
Mfr. Part No.CY62158ELL-45ZSXI
kr 111,54
Each
Units
8Mbit 1M x 8 bit 1M 8bit 45ns 8bit 1MHz Yes - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
RS Stock No. 171-0983
Mfr. Part No.CY62167EV30LL-45ZXI
kr 124,80
Each (In a Tray of 192)
Units
16Mbit 1M x 16 bit 1M 16bit 45ns 16bit - Yes - Surface Mount TSOP 48 18.4 x 12 x 1.05mm 1.05mm
RS Stock No. 125-7519
Mfr. Part No.CY62187EV30LL-55BAXI
kr 746,00
Each
Units
64Mbit 4M x 16 bit 4M 16bit 55ns 16bit - Yes - Surface Mount VFBGA 48 8 x 9.5 x 1.2mm 1.2mm
RS Stock No. 125-7517
Mfr. Part No.CY62167EV30LL-45ZXI
kr 172,09
Each
Units
16Mbit 1M x 16 bit 1M 16bit 45ns 16bit - Yes - Surface Mount TSOP 48 18.4 x 12 x 1.05mm 1.05mm
RS Stock No. 171-0985
Mfr. Part No.CY62187EV30LL-55BAXI
kr 523,539
Each (In a Tray of 210)
Units
64Mbit 4M x 16 bit 4M 16bit 55ns 16bit - Yes - Surface Mount VFBGA 48 8 x 9.5 x 1.2mm 1.2mm
RS Stock No. 188-5317
Mfr. Part No.CY62128ELL-45SXI
kr 23,593
Each (In a Tube of 25)
Units
1Mbit 128k x 8 bit 128k 8bit 45ns 8bit 1MHz Yes - Surface Mount SOIC 32 20.75 x 11.43 x 2.88mm 2.88mm
RS Stock No. 125-6971
Mfr. Part No.CY62128ELL-45SXI
kr 29,785
Each (In a Pack of 2)
Units
1Mbit 128k x 16 bit 128k 16bit 45ns 8bit - Yes - Surface Mount SOIC 32 20.751 x 11.43 x 2.895mm 2.895mm
New
RS Stock No. 194-8892
Mfr. Part No.CY62177EV18LL-70BAXI
kr 306,14
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 198-7993
Mfr. Part No.CY62128EV30LL-45SXIT
kr 28,914
Each (In a Pack of 5)
Units
1024kbit 128k x 8 bit 128k 8bit 45ns - - - - - - - - -
RS Stock No. 181-8296
Mfr. Part No.CY62128ELL-45SXIT
kr 28,917
Each (In a Pack of 3)
Units
1Mbit 128k x 8 bit 128k 8bit 45ns 8bit - Yes Asynchronous Surface Mount SOIC 32 20.75 x 11.43 x 2.81mm 2.81mm
RS Stock No. 181-7448
Mfr. Part No.CY7C1041GN-10ZSXI
kr 38,234
Each (In a Tray of 135)
Units
4Mbit 256k x 16 bit 256k 16bit 10ns - - - Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
RS Stock No. 198-7996
Mfr. Part No.CY62147EV30LL-45ZSXIT
kr 23,968
Each (On a Reel of 1000)
Units
4096kbit 256k x 16 bit 256k 16bit 45ns - - - - - - - - -
RS Stock No. 125-6983
Mfr. Part No.CY62157EV30LL-45ZSXI
kr 80,77
Each
Units
8Mbit 512k x 16 bit 512k 16bit 45ns 16bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
RS Stock No. 124-2943
Mfr. Part No.CY62157EV30LL-45BVXI
kr 93,60
Each
Units
8Mbit 1M x 8 bit, 512k x 16 bit 512k 8 bit, 16bit 45ns 8 bit, 16 bit 1MHz Yes - Surface Mount VFBGA 48 6 x 8 x 0.79mm 0.79mm
RS Stock No. 181-8242
Mfr. Part No.CY62128ELL-45SXIT
kr 20,273
Each (On a Reel of 1000)
Units
1Mbit 128k x 8 bit 128k 8bit 45ns 8bit - Yes Asynchronous Surface Mount SOIC 32 20.75 x 11.43 x 2.81mm 2.81mm
New
RS Stock No. 194-8908
Mfr. Part No.CY7C1020DV33-10ZSXI
kr 48,705
Each (In a Pack of 2)
Units
- - - - - - - - - - - - - -
RS Stock No. 198-7999
Mfr. Part No.CY62148EV30LL-45ZSXIT
kr 37,885
Each (In a Pack of 2)
Units
4096kbit 512k x 8 bit 512k 8bit 45ns - - - - - - - - -
New
RS Stock No. 194-8926
Mfr. Part No.CY7C1061GN30-10ZSXI
kr 466,71
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 125-7535
Mfr. Part No.CY7C1051DV33-10ZSXI
kr 256,20
Each
Units
8Mbit 512k x 16 bit 512k 16bit 10ns 16bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm