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 Prix 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
N° de stock RS 188-5328
Référence fabricantCY62158ELL-45ZSXI
8,141 €
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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
N° de stock RS 125-7536
Référence fabricantCY7C1059DV33-10ZSXI
9,28 €
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8Mbit 1M x 8 bit 1M 8bit 10ns 8bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
N° de stock RS 124-2945
Référence fabricantCY62158ELL-45ZSXI
10,26 €
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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
N° de stock RS 124-2949
Référence fabricantCY7C1021D-10ZSXI
2,66 €
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1Mbit 64k x 16 bit 64k 16bit 10ns 16bit 100MHz Yes Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
N° de stock RS 188-5334
Référence fabricantCY7C1021D-10ZSXI
2,135 €
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1Mbit 128k x 8 bit 128k 8bit 10ns 16bit 100MHz - Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
N° de stock RS 171-0993
Référence fabricantCY7C1059DV33-10ZSXI
7,417 €
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8Mbit 1M x 8 bit 1M 8bit 10ns 8bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
N° de stock RS 181-7610
Référence fabricantCY7C1021DV33-10ZSXIT
2,597 €
Each (In a Pack of 3)
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1Mbit 64k x 16 bit 64k 16bit 10ns - - - Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
Nouveau
N° de stock RS 194-8859
Référence fabricantCY62136EV30LL-45BVXI
2,812 €
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- - - - - - - - - - - - - -
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N° de stock RS 194-8860
Référence fabricantCY62136EV30LL-45BVXI
2,96 €
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- - - - - - - - - - - - - -
N° de stock RS 182-3336
Référence fabricantCY7C1021DV33-10BVXI
2,693 €
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- - - - - - - - - - - - - -
N° de stock RS 125-7528
Référence fabricantCY7C1019D-10ZSXI
2,365 €
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1Mbit 128k x 8 bit 128k 8bit 10ns 8bit - Yes - Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm
Nouveau
N° de stock RS 194-8891
Référence fabricantCY62177EV18LL-70BAXI
27,721 €
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- - - - - - - - - - - - - -
N° de stock RS 125-6981
Référence fabricantCY62148EV30LL-45BVXI
5,21 €
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4Mbit 512k x 8 bit 512k 8bit 45ns 8bit - Yes - Surface Mount VFBGA 36 6 x 8 x 0.84mm 0.84mm
N° de stock RS 193-8464
Référence fabricantCY7C1021DV33-10VXIT
1,716 €
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1Mbit 64k x 16 bit 64k 16bit 10ns 16bit 1MHz - Asynchronous Through Hole SOJ 44 1.12 x 0.395 x 0.095in 2.41mm
N° de stock RS 181-7613
Référence fabricantCY7C1061GE30-10ZSXI
29,78 €
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16Mbit 1M x 16 bit 1M 16bit 10ns - - - Asynchronous Surface Mount TSOP 54 22.51 x 10.26 x 1.05mm 1.05mm
Nouveau
N° de stock RS 194-8892
Référence fabricantCY62177EV18LL-70BAXI
28,16 €
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Unité
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N° de stock RS 182-3293
Référence fabricantCY7C1041G30-10ZSXE
5,955 €
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4Mbit 256k x 16 bit 256k 16bit 10ns - 1MHz - Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.05mm 1.05mm
N° de stock RS 181-7443
Référence fabricantCY62148EV30LL-45ZSXI
3,147 €
Each (In a Tray of 117)
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4Mbit 512k x 8 bit 512k 8bit 45ns 8bit - Yes - Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm
N° de stock RS 125-6937
Référence fabricantCY14B256LA-SZ45XI
14,02 €
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256kbit 32k x 8 bit 32k 8bit 45ns 8bit - - - Surface Mount SOIC 32 20.878 x 7.594 x 2.286mm 2.286mm
N° de stock RS 171-0970
Référence fabricantCY62137FV30LL-45BVXI
2,354 €
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2Mbit 128k x 16 bit 128k 16bit 45ns 16bit - Yes - Surface Mount VFBGA 48 6 x 8 x 0.81mm 0.81mm