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. 170-0736
Mfr. Part No.AS6C62256-55PCN
MYR9.33
Each (In a Tube of 15)
units
256kbit 32K words x 8 bit 32K 8bit 55ns 15bit - Yes Asynchronous Through Hole PDIP 28 36.32 x 13.21 x 3.81mm 3.81mm
RS Stock No. 538-148
Mfr. Part No.AS6C62256-55PCN
MYR10.055
Each (In a Pack of 2)
units
256kbit 32K words x 8 bit 32K 8bit 55ns 15bit - Yes Asynchronous Through Hole PDIP 28 36.32 x 13.21 x 3.81mm 3.81mm
RS Stock No. 170-0895
Mfr. Part No.AS6C4008-55PCN
MYR17.938
Each (In a Tube of 13)
units
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
RS Stock No. 744-4561
Mfr. Part No.AS6C4008-55PCN
MYR19.78
Each
units
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
RS Stock No. 538-158
Mfr. Part No.AS6C6264-55PCN
MYR10.66
Each (In a Pack of 2)
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
RS Stock No. 538-198
Mfr. Part No.AS7C34098A-12TIN
MYR22.41
Each
units
4Mbit 256K words x 16 bit 256K 16bit 12ns 18bit - Yes Asynchronous Surface Mount TSOP 44 18.54 x 10.29 x 1.05mm 1.05mm
RS Stock No. 744-4573
Mfr. Part No.AS7C34098A-10TCN
MYR22.41
Each
units
4Mbit 256K x 16 bit 256K 16bit 10ns 18bit - Yes Asynchronous Surface Mount TSOP 44 18.52 x 10.26 x 1.05mm 1.05mm
RS Stock No. 797-5869
Mfr. Part No.AS7C316096A-10TIN
MYR102.26
Each
units
16Mbit 2048K x 8 bit 2048K 8bit 10ns 8bit 1MHz Yes Asynchronous Surface Mount TSOP 48 18.5 x 12.1 x 1.05mm 1.05mm
RS Stock No. 538-186
Mfr. Part No.AS6C6264-55SIN
MYR9.11
Each (In a Pack of 2)
units
64kbit 8K words x 8 bit 8K 8bit 55ns 13bit - Yes Asynchronous Surface Mount SOP 28 18.49 x 8.64 x 2.49mm 2.49mm
RS Stock No. 538-271
Mfr. Part No.AS6C8016-55ZIN
MYR28.51
Each
units
8Mbit 512K words x 16 bit 512K 16bit 55ns 19bit - Yes Asynchronous Surface Mount TSOP 44 18.42 x 10.16 x 1mm 1mm
RS Stock No. 744-4549
Mfr. Part No.AS7C1026B-12TCN
MYR11.41
Each
units
1Mbit 64K x 16 bit 64K 16bit 12ns 16bit - Yes Asynchronous Surface Mount TSOP 44 18.52 x 10.26 x 1.05mm 1.05mm
RS Stock No. 538-215
Mfr. Part No.AS7C34096A-12TIN
MYR22.41
Each
units
4Mbit 512K words x 8 bit 512K 8bit 12ns 19bit - Yes Asynchronous Surface Mount TSOP 44 18.54 x 10.29 x 1.05mm 1.05mm
RS Stock No. 170-0740
Mfr. Part No.AS6C6264-55SIN
MYR8.069
Each (In a Tube of 25)
units
64kbit 8K words x 8 bit 8K 8bit 55ns 13bit - Yes Asynchronous Surface Mount SOP 28 18.49 x 8.64 x 2.49mm 2.49mm
RS Stock No. 797-5888
Mfr. Part No.AS7C38098A-10BIN
MYR57.93
Each
units
8Mbit 512K x 16 bit 512K 16bit 10ns 16bit 1MHz Yes Asynchronous Surface Mount TFBGA 48 6.05 x 8.05 x 1.05mm 1.05mm
RS Stock No. 170-0891
Mfr. Part No.AS6C1008-55PCN
MYR10.246
Each (In a Tube of 13)
units
1Mbit 128K x 8 bit 128K 8bit 55ns 17bit - Yes Asynchronous Through Hole PDIP 32 41.91 x 13.818 x 3.81mm 3.81mm
RS Stock No. 170-0743
Mfr. Part No.AS7C4098A-12JIN
MYR19.533
Each (In a Tube of 16)
units
4Mbit 256K words x 16 bit 256K 16bit 12ns 18bit - Yes Asynchronous Surface Mount SOJ 44 28.7 x 10.29 x 2.92mm 2.92mm
RS Stock No. 170-0744
Mfr. Part No.AS7C4096A-12JIN
MYR19.533
Each (In a Tube of 19)
units
4Mbit 512K words x 8 bit 512K 8bit 12ns 19bit - Yes Asynchronous Surface Mount SOJ 36 23.62 x 10.16 x 2.95mm 2.95mm
RS Stock No. 797-5863
Mfr. Part No.AS7C316098A-10BIN
MYR92.12
Each
units
16Mbit 1024K x 16 bit 1024K 16bit 10ns 16bit 1MHz Yes Asynchronous Surface Mount TFBGA 48 6.05 x 8.05 x 1.05mm 1.05mm
RS Stock No. 538-259
Mfr. Part No.AS7C34096A-12JIN
MYR20.59
Each
units
4Mbit 512K words x 8 bit 512K 8bit 12ns 19bit - Yes Asynchronous Surface Mount SOJ 36 23.62 x 10.16 x 2.95mm 2.95mm
RS Stock No. 538-237
Mfr. Part No.AS7C1024C-12JIN
MYR14.465
Each (In a Pack of 2)
units
1Mbit 128K words x 8 bit 128K 8bit 12ns 17bit - Yes Asynchronous Surface Mount SOJ 32 21.08 x 10.29 x 2.92mm 2.92mm