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 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 170-2188
Référence fabricantIS62WV1288BLL-55TLI
MarqueISSI
1,573 €
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1Mbit 128k x 8 bit 128k 8bit 55ns 17bit - Yes - Surface Mount TSOP 32 18.5 x 8.1 x 0.95mm 0.95mm
N° de stock RS 124-2949
Référence fabricantCY7C1021D-10ZSXI
2,66 €
Each (In a Pack of 2)
Unité
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 170-0736
Référence fabricantAS6C62256-55PCN
1,97 €
Each (In a Tube of 15)
Unité
256kbit 32k x 8 bit 32k 8bit 55ns 15bit - Yes Asynchronous Through Hole PDIP 28 36.32 x 13.21 x 3.81mm 3.81mm
N° de stock RS 170-2075
Référence fabricantIDT7132LA35PDG
MarqueIDT
10,844 €
Each (In a Tube of 7)
Unité
16kbit 2k x 8 bit 2k 8bit 35ns 8bit - Yes Asynchronous Through Hole PDIP 48 61.7 x 15.24 x 3.8mm 3.8mm
N° de stock RS 538-148
Référence fabricantAS6C62256-55PCN
2,265 €
Each (In a Pack of 2)
Unité
256kbit 32k x 8 bit 32k 8bit 55ns 15bit - Yes Asynchronous Through Hole PDIP 28 36.32 x 13.21 x 3.81mm 3.81mm
N° de stock RS 188-5334
Référence fabricantCY7C1021D-10ZSXI
2,135 €
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Unité
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 170-0895
Référence fabricantAS6C4008-55PCN
3,94 €
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Unité
4Mbit 512k x 8 bit 512k 8bit 55ns 19bit - Yes Asynchronous Through Hole PDIP 32 41.91 x 13.818 x 3.81mm 3.81mm
N° de stock RS 170-0738
Référence fabricantAS6C4008-55SIN
3,419 €
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Unité
4Mbit 512k x 8 bit 512k 8bit 55ns 19bit - Yes Asynchronous Surface Mount SOP 32 20.75 x 11.3 x 2.82mm 2.82mm
N° de stock RS 170-0747
Référence fabricantAS7C1024C-12JIN
3,68 €
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1Mbit 128k x 8 bit 128k 8bit 12ns 17bit - Yes Asynchronous Surface Mount SOJ 32 21.08 x 10.29 x 2.92mm 2.92mm
N° de stock RS 538-160
Référence fabricantAS6C4008-55SIN
3,88 €
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Unité
4Mbit 512k x 8 bit 512k 8bit 55ns 19bit - Yes Asynchronous Surface Mount SOP 32 20.75 x 11.3 x 2.82mm 2.82mm
N° de stock RS 811-5181
Référence fabricantIS61WV25616BLL-10TLI
MarqueISSI
3,485 €
Each (In a Pack of 2)
Unité
4Mbit 256k x 16 bit 256k 16bit 10ns 18bit - - Asynchronous Surface Mount TSOP 44 18.54 x 10.29 x 1.05mm 1.05mm
N° de stock RS 170-2048
Référence fabricantIS62C256AL-45TLI
MarqueISSI
1,007 €
Each (In a Tray of 234)
Unité
256kbit 32k x 8 bit 32k 8bit 45ns 15bit - Yes Asynchronous Surface Mount TSOP 28 8.1 x 11.9 x 1mm 1mm
N° de stock RS 170-2182
Référence fabricantIS61WV25616BLL-10TLI
MarqueISSI
2,76 €
Each (In a Tray of 135)
Unité
4Mbit 256k x 16 bit 256k 16bit 10ns 18bit - - Asynchronous Surface Mount TSOP 44 18.54 x 10.29 x 1.05mm 1.05mm
N° de stock RS 714-4826
Référence fabricantIDT7132LA35PDG
MarqueIDT
13,23 €
Each
Unité
16kbit 2k x 8 bit 2k 8bit 35ns 8bit - Yes Asynchronous Through Hole PDIP 48 61.7 x 15.24 x 3.8mm 3.8mm
N° de stock RS 391-646
Référence fabricantIS62C256AL-45TLI
MarqueISSI
1,018 €
Each (In a Pack of 4)
Unité
256kbit 32k x 8 bit 32k 8bit 45ns 15bit - Yes Asynchronous Surface Mount TSOP 28 8.1 x 11.9 x 1mm 1mm
N° de stock RS 181-7610
Référence fabricantCY7C1021DV33-10ZSXIT
2,597 €
Each (In a Pack of 3)
Unité
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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- - - - - - - - - - - - - -
Nouveau
N° de stock RS 217-3678
Référence fabricant71321LA55PPGI
12,01 €
Each
Unité
16kbit 2K x 8 2K 8bit 55ns - - - - - - - - -