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
RS Stock No. 125-6934
Mfr. Part No.CY14B104NA-ZS25XI
MYR153.38
Each
units
4Mbit 256K x 16 bit, 512K x 8 bit 256K, 512K 8 bit, 16 bit 25ns 8 bit, 16 bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
RS Stock No. 714-4826
Mfr. Part No.IDT7132LA35PDG
BrandIDT
MYR70.98
Each
units
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
RS Stock No. 823-4440
Mfr. Part No.23K256-E/ST
BrandMicrochip
MYR6.33
Each (In a Pack of 5)
units
256kbit 32768 x 8 bit 32768 8bit 50ns 16bit 20MHz - Synchronous Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 1.05mm
RS Stock No. 170-2076
Mfr. Part No.IDT70V25L20PFGI
BrandIDT
MYR210.403
Each (In a Tray of 45)
units
128kbit 8K x 16 bit 8K 16bit 20ns 26bit - Yes Asynchronous Surface Mount TQFP 100 14 x 14 x 1.4mm 1.4mm
RS Stock No. 182-3330
Mfr. Part No.CY7C1019CV33-10ZXA
MYR23.65
Each (In a Pack of 2)
units
- - - - - - - - - - - - - -
RS Stock No. 181-8269
Mfr. Part No.CY7C1069G30-10ZSXI-CYP
MYR186.406
Each (In a Tray of 108)
units
16Mbit 2M x 8 bit 2M 8bit 10ns - 100MHz - Asynchronous Surface Mount TSOP 54 22.51 x 10.26 x 1.05mm 1.05mm
RS Stock No. 714-4778
Mfr. Part No.IDT7130LA25JGI
BrandIDT
MYR59.19
Each
units
8kbit 1K x 8 bit 1K 8bit 25ns 8bit - Yes Asynchronous Surface Mount PLCC 52 19 x 19 x 3.63mm 3.63mm
RS Stock No. 797-9372
Mfr. Part No.DS1225AB-85+
MYR69.98
Each
units
64kbit 8K x 8 bit 8K 8bit 85ns 8bit - Yes - Through Hole EDIP 28 39.37 x 18.29 x 10.67mm 10.67mm
RS Stock No. 538-154
Mfr. Part No.AS6C8008-55ZIN
MYR33.28
Each
units
8Mbit 1024K words x 8 bit 1M 8bit 55ns 20bit - Yes Asynchronous Surface Mount TSOP 44 18.42 x 10.16 x 1mm 1mm
RS Stock No. 901-5727
Mfr. Part No.R1LV1616RBG-7SI#B0
MYR159.19
Each
units
16Mbit 1M x 16 bit, 2M x 8 bit 1M, 2M 8 bit, 16 bit 70ns 8 bit, 16 bit 1MHz - - Surface Mount TFBGA 48 7.5 x 8.5 x 0.8mm 0.8mm
RS Stock No. 714-4788
Mfr. Part No.IDT7133LA25JGI
BrandIDT
MYR107.33
Each
units
32kbit 2K x 16 bit 2K 16bit 25ns 16bit - Yes Asynchronous Surface Mount PLCC 68 24 x 24 x 3.63mm 3.63mm
RS Stock No. 181-7444
Mfr. Part No.CY62256VNLL-70ZXI
MYR6.526
Each (In a Tray of 234)
units
256kbit 32K x 8 bit 32K 8bit 70ns - - Yes - Surface Mount TSOP 28 11.9 x 8.1 x 1.02mm 1.02mm
RS Stock No. 744-4539
Mfr. Part No.AS6C1008-55STIN
MYR9.34
Each (In a Pack of 2)
units
1048576bit 128K x 8 bit 128K 8bit 55ns - - Yes - Surface Mount STSOP 32 11.8 x 8 x 1mm 1mm
RS Stock No. 181-7451
Mfr. Part No.CY7C1061GE30-10ZSXI
MYR143.383
Each (In a Tray of 108)
units
16Mbit 1M x 16 bit 1M 16bit 10ns - - - Asynchronous Surface Mount TSOP 54 22.51 x 10.26 x 1.05mm 1.05mm
RS Stock No. 171-0971
Mfr. Part No.CY62137FV30LL-45ZSXI
MYR21.35
Each (In a Tray of 270)
units
2Mbit 128K x 16 bit 128K 16bit 45ns 16bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
RS Stock No. 811-5166
Mfr. Part No.IS61C256AL-12JLI-TR
BrandISSI
MYR5.773
Each (In a Pack of 4)
units
256kbit 32k x 8 32k 8bit 12ns 15bit - Yes - Surface Mount SOJ 28 18.54 x 7.75 x 2.67mm 2.67mm
RS Stock No. 125-7526
Mfr. Part No.CY7C1009D-10VXI
MYR12.43
Each (In a Pack of 2)
units
1Mbit 128K x 8 bit 128K 8bit 10ns - - Yes - Surface Mount SOJ 32 21.08 x 7.75 x 2.92mm 2.92mm
RS Stock No. 124-2949
Mfr. Part No.CY7C1021D-10ZSXI
MYR12.43
Each (In a Pack of 2)
units
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
RS Stock No. 170-2049
Mfr. Part No.IS62C1024AL-35QLI
BrandISSI
MYR10.193
Each (In a Tray of 84)
units
1Mbit 128K words x 8 bit 128K 8bit 35ns 17bit - Yes Asynchronous Surface Mount SOP 32 20.75 x 11.43 x 3mm 3mm
RS Stock No. 182-3394
Mfr. Part No.CY7C1049GN30-10VXI
MYR23.65
Each (In a Pack of 2)
units
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