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. 170-2150
Mfr. Part No.IDT71V416S10PHGI
BrandIDT
MYR25.451
Each (In a Tube of 26)
units
4Mbit 256K x 16 bit 256K 16bit 10ns 18bit - Yes Asynchronous Surface Mount TSOP 44 18.41 x 10.16 x 1mm 1mm
RS Stock No. 125-6979
Mfr. Part No.CY62138FV30LL-45ZAXI
MYR17.83
Each (In a Pack of 2)
units
2Mbit 256K x 8 bit 256K 8bit 45ns 8bit - Yes - Surface Mount STSOP 32 11.9 x 8.1 x 1.05mm 1.05mm
RS Stock No. 823-4532
Mfr. Part No.23LC512-I/ST
BrandMicrochip
MYR6.84
Each (In a Pack of 5)
units
512kbit 64k x 8 bit 64K 8bit 25ns 16bit 20MHz - Synchronous Through Hole TSSOP 8 0.4 x 0.28 x 0.195in 4.95mm
RS Stock No. 744-4558
Mfr. Part No.AS7C31024B-12TCN
MYR11.66
Each
units
1Mbit 128K x 8 bit 128K 8bit 12ns 17bit - Yes Asynchronous Surface Mount TSOP 32 18.5 x 8.1 x 1.05mm 1.05mm
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
RS Stock No. 538-170
Mfr. Part No.AS6C1008-55SIN
MYR8.975
Each (In a Pack of 2)
units
1Mbit 128K words x 8 bit 128K 8bit 55ns 17bit - Yes Asynchronous Surface Mount SOP 32 20.75 x 11.3 x 2.82mm 2.82mm
RS Stock No. 151-1491
Mfr. Part No.47L16-I/P
BrandMicrochip
MYR3.65
Each (In a Pack of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 170-0888
Mfr. Part No.U62256AS2C07LLG1
MYR15.915
Each (In a Tube of 25)
units
256kbit 32K x 8 bit 32K 8bit 56ns 15bit - Yes Asynchronous Surface Mount SOP 28 18.49 x 8.64 x 2.49mm 2.49mm
RS Stock No. 171-0981
Mfr. Part No.CY62167DV30LL-70BVI
MYR37.26
Each (In a Tray of 210)
units
16Mbit 1M x 16 bit 1M 16bit 70ns 16bit - Yes - Surface Mount VFBGA 48 8 x 9.5 x 0.81mm 0.81mm
RS Stock No. 146-8905
Mfr. Part No.47C16-I/P
BrandMicrochip
MYR4.096
Each (In a Pack of 10)
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. 126-6968
Mfr. Part No.R1LV1616HBG-4SI#B0
MYR313.81
Each
units
16Mbit 1M words x 16 bit 1M 16bit 45ns 20bit - Yes - Surface Mount FBGA 48 8 x 9.5 x 0.9mm 0.9mm
RS Stock No. 538-142
Mfr. Part No.AS6C62256-55SIN
MYR8.095
Each (In a Pack of 2)
units
256kbit 32K words x 8 bit 32K 8bit 55ns 15bit - Yes Asynchronous Surface Mount SOP 28 18.49 x 8.64 x 2.49mm 2.49mm
RS Stock No. 182-3344
Mfr. Part No.CY7C1041G-10VXI
MYR31.70
Each (In a Pack of 2)
units
- - - - - - - - - - - - - -
RS Stock No. 767-5963
Mfr. Part No.R1WV6416RBG-7SI#B0
MYR256.56
Each
units
64Mbit 4M words x 16 bit 4M 16bit 70ns - - Yes Asynchronous Surface Mount FBGA 48 8.5 x 11 x 0.8mm 0.8mm
RS Stock No. 125-6974
Mfr. Part No.CY62128EV30LL-45SXI
MYR13.87
Each (In a Pack of 2)
units
1Mbit 128K x 8 bit 128K 8bit 45ns 8bit - Yes - Surface Mount SOIC 32 20.751 x 11.43 x 2.895mm 2.895mm
RS Stock No. 923-7756
Mfr. Part No.DS1245AB-100+
MYR112.39
Each (In a Tube of 11)
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. 170-2045
Mfr. Part No.IS62WV12816BLL-55TLI
BrandISSI
MYR19.004
Each (In a Tray of 135)
units
2Mbit 128K words x 16 bit 128K 16bit 55ns 17bit - Yes Asynchronous Surface Mount TSOP 44 18.52 x 10.29 x 1.05mm 1.05mm
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
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