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. Its 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 computers 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 include: 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 Simplicity Faster – quick and easy to control Used as cache memory Large size Price – expensive as it uses more chips than DRAM for the same amount of storage space High power Consumption ReliabilityDisadvantages include: Capacity Varying power consumptionCan be found in the following: Computers Workstations Routers LCD screens and printers Electronics Microprocessor

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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. 193-8453
Mfr. Part No.CY62126EV30LL-45ZSXIT
MYR13.12
Each (In a Pack of 5)
units
1Mbit 64 k x 16 bit 64 k 16bit 45ns 16bit 1MHz Yes Asynchronous Surface Mount TSOP II 44 18.517 x 10.262 x 1.044mm 1.04mm
RS Stock No. 126-6983
Mfr. Part No.RMLV0816BGSB-4S2#AA0
MYR138.87
Each
units
8Mbit 512K words x 16 bit 512K 16bit 45ns 19bit - Yes - Surface Mount TSOP 44 18.54 x 10.29 x 1.05mm 1.05mm
New
RS Stock No. 193-8456
Mfr. Part No.CY621472E30LL-45ZSXI
MYR25.213
Each (In a Tray of 135)
units
4Mbit 256 k x 16 bit 256 k 16bit 45ns 16bit 1MHz Yes Asynchronous Surface Mount TSOP II 44 18.517 x 10.262 x 1.044mm 1.04mm
RS Stock No. 811-5157
Mfr. Part No.IS61C25616AL-10TLI
BrandISSI
MYR22.045
Each (In a Pack of 2)
units
4Mbit 256k x 16 256k 16bit 10ns 18bit - - - Surface Mount TSOP 44 18.52 x 10.29 x 1.05mm 1.05mm
RS Stock No. 177-5513
Mfr. Part No.AS6C6264-55PCN
MYR9.585
Each (In a Tube of 15)
units
64kbit 8K words x 8 bit 8K 8bit 55ns 13bit - Yes Asynchronous Through Hole PDIP 28 36.32 x 13.21 x 3.81mm 3.81mm
New
RS Stock No. 193-8459
Mfr. Part No.CY62256NLL-55ZXIT
MYR7.74
Each (In a Pack of 5)
units
256kbit 32 k x 8 bit 32 k 8bit 55ns 8bit 1MHz Yes Asynchronous Surface Mount TSOP I 28 11.9 x 8.1 x 1mm 1mm
RS Stock No. 171-0977
Mfr. Part No.CY62157EV30LL-45ZSXI
MYR27.08
Each (In a Tray of 270)
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. 171-0963
Mfr. Part No.CY14B108N-ZSP45XI
MYR158.163
Each (In a Tray of 108)
units
8Mbit 512K x 16 bit 512K 16bit 45ns 16bit - Yes Asynchronous Surface Mount TSOP 54 22.517 x 10.262 x 1.05mm 1.05mm
RS Stock No. 145-3875
Mfr. Part No.N01S830HAT22I
MYR14.426
Each (In a Tube of 100)
units
1Mbit 128K x 8 bit - 128K 5ns 24bit 20MHz Yes Synchronous Surface Mount TSSOP 8 4.4 x 3 x 0.9mm 0.9mm
RS Stock No. 171-0987
Mfr. Part No.CY7C1019D-10ZSXI
MYR15.876
Each (In a Tray of 468)
units
1Mbit 128K x 8 bit 128K 8bit 10ns 8bit - Yes - Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm
New
RS Stock No. 189-7468
Mfr. Part No.DS1245Y-100+
MYR168.964
Each (In a Tube of 11)
units
1Mbit 128K x 8 bit 128K 8bit 100ns 17bit - Yes Asynchronous Through Hole EDIP 32 44.2 x 18.8 x 9.9mm 9.9mm
RS Stock No. 797-9408
Mfr. Part No.DS1245AB-120+
MYR120.33
Each
units
1024kbit 128K x 8 bit 128K 8bit 70ns 8bit - Yes - Through Hole EDIP 32 44.2 x 18.8 x 10.92mm 10.92mm
RS Stock No. 165-9425
Mfr. Part No.DS1220AD-150+
MYR53.95
Each (In a Tube of 14)
units
16kbit 2K x 8 bit 2K 8bit 100ns 8bit - Yes - Through Hole EDIP 24 38.1 x 18.29 x 10.67mm 10.67mm
RS Stock No. 391-696
Mfr. Part No.IS61LV5128AL-10TLI
BrandISSI
MYR27.73
Each
units
4Mbit 512K words x 8 bit 512K 8bit 10ns 19bit - Yes Asynchronous Surface Mount TSOP 44 18.52 x 10.29 x 1.05mm 1.05mm
RS Stock No. 803-2272
Mfr. Part No.23LCV1024-I/P
BrandMicrochip
MYR10.35
Each (In a Pack of 5)
units
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes - Through Hole PDIP 8 10.16 x 7.11 x 4.95mm 4.95mm
RS Stock No. 146-3208
Mfr. Part No.47C16-I/P
BrandMicrochip
MYR3.58
Each (In a Tube of 60)
units
16kbit 2048K x 8 - 8bit - - 1000kHz Yes Synchronous Through Hole DIP 8 10.2 x 7.1 x 4.83mm 4.83mm
RS Stock No. 923-7759
Mfr. Part No.DS1250Y-70IND+
MYR329.16
Each (In a Tube of 11)
units
4096kbit 512K x 8 bit 512K 8bit 70ns 8bit - Yes - Through Hole EDIP 32 44.2 x 18.8 x 10.92mm 10.92mm
RS Stock No. 803-2181
Mfr. Part No.23LCV1024-I/SN
BrandMicrochip
MYR10.10
Each (In a Pack of 5)
units
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes - Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 1.25mm
RS Stock No. 912-6849
Mfr. Part No.23LCV1024-I/SN
BrandMicrochip
MYR10.765
Each (In a Tube of 100)
units
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes - Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 1.25mm
RS Stock No. 797-9398
Mfr. Part No.DS1245AB-100+
MYR119.59
Each
units
1024kbit 128K x 8 bit 128K 8bit 70ns 8bit - Yes - Through Hole EDIP 32 44.2 x 18.8 x 10.92mm 10.92mm
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