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庫存編號 170-2180
製造零件編號IS61WV102416BLL-10TLI
BrandISSI
HK$162.41
Each (In a Tray of 96)
單位
16Mbit 1M x 16 1M 16bit 10ns 20bit - Yes Asynchronous Surface Mount TSOP 48 18.6 x 12.2 x 1.05mm 1.05mm
RS庫存編號 811-5175
製造零件編號IS61WV102416BLL-10TLI
BrandISSI
HK$180.72
單位
16Mbit 1M x 16 1M 16bit 10ns 20bit - Yes Asynchronous Surface Mount TSOP 48 18.6 x 12.2 x 1.05mm 1.05mm
RS庫存編號 799-2717
製造零件編號DS1230Y-70IND+
HK$198.90
單位
256kbit 32K x 8 bit 32K 8bit 70ns 15bit - Yes - Through Hole EDIP 28 39.37 x 18.8 x 10.67mm 10.67mm
RS庫存編號 170-0740
製造零件編號AS6C6264-55SIN
HK$17.189
毎管:25 個
單位
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庫存編號 538-186
製造零件編號AS6C6264-55SIN
HK$19.455
/個 (每包:2個)
單位
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庫存編號 923-7790
製造零件編號DS1230Y-70IND+
HK$185.26
毎管:12 個
單位
256kbit 32K x 8 bit 32K 8bit 70ns 15bit - Yes - Through Hole EDIP 28 39.37 x 18.8 x 10.67mm 10.67mm
RS庫存編號 170-2070
製造零件編號IDT7133LA25JGI
BrandIDT
HK$185.661
毎管:18 個
單位
32kbit 2K x 16 bit 2K 16bit 25ns 16bit - Yes Asynchronous Surface Mount PLCC 68 24 x 24 x 3.63mm 3.63mm
RS庫存編號 923-7598
製造零件編號DS1225AD-200+
HK$138.09
毎管:12 個
單位
64kbit 8K x 8 bit 8K 8bit 200ns 13bit - Yes Asynchronous Through Hole EDIP 28 39.37 x 18.8 x 9.35mm 9.35mm
RS庫存編號 391-696
製造零件編號IS61LV5128AL-10TLI
BrandISSI
HK$38.25
單位
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庫存編號 170-0738
製造零件編號AS6C4008-55SIN
HK$33.212
毎管:22 個
單位
4Mbit 512K words x 8 bit 512K 8bit 55ns 19bit - Yes Asynchronous Surface Mount SOP 32 20.75 x 11.3 x 2.82mm 2.82mm
RS庫存編號 170-2052
製造零件編號IS61LV5128AL-10TLI
BrandISSI
HK$41.841
Each (In a Tray of 135)
單位
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庫存編號 125-7518
製造零件編號CY62177EV30LL-55ZXI
HK$475.00
單位
32Mbit 2M x 16 bit 2M 16bit 55ns 16bit - Yes - Surface Mount TSOP 48 18.4 x 12 x 1.05mm 1.05mm
RS庫存編號 178-4043
製造零件編號23LC512-I/SN
BrandMicrochip
HK$12.204
毎管:100 個
單位
512kbit 64K x 8 bit 64K 8bit 5ns 8bit 20MHz Yes Synchronous Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 1.5mm
RS庫存編號 538-221
製造零件編號AS7C4096A-12TIN
HK$45.95
單位
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庫存編號 170-0922
製造零件編號AS7C316096A-10TIN
HK$289.61
Each (In a Tray of 156)
單位
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庫存編號 714-4835
製造零件編號IDT70V25L20PFGI
BrandIDT
HK$296.67
單位
128kbit 8K x 16 bit 8K 16bit 20ns 26bit - Yes Asynchronous Surface Mount TQFP 100 14 x 14 x 1.4mm 1.4mm
RS庫存編號 145-3623
製造零件編號N25S830HAS22I
HK$13.416
毎管:100 個
單位
256kbit 32k x 8 bit 32K 8bit 25ns 16bit 20MHz Yes Synchronous Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm
RS庫存編號 577-721
製造零件編號R1LP0408CSB-7LC#BT
HK$150.00
單位
4Mbit 512K x 8 bit 512K 8bit 70ns 19bit - Yes Asynchronous Surface Mount TSOP 32 - -
RS庫存編號 126-7312
製造零件編號RMLV1616AGSD-5S2#AC0
HK$394.30
單位
16Mbit 1M words x 16 bit, 2M words x 8 bit 1M, 2M 8 bit, 16 bit 55ns 19 bit, 20 bit - Yes - Surface Mount TSOP 52 10.89 x 8.99 x 1mm 1mm
RS庫存編號 170-0923
製造零件編號AS7C38098A-10TIN
HK$146.504
Each (In a Tray of 135)
單位
8Mbit 512K x 16 bit 512K 16bit 10ns 16bit 1MHz Yes Asynchronous Surface Mount TSOP 44 18.618 x 10.363 x 1.05mm 1.05mm