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 146-8933
製造零件編號47L04-I/P
BrandMicrochip
HK$6.95
/個 (每包:10個)
單位
4kbit 512K x 8 - 8bit - - 1000kHz Yes Synchronous Through Hole DIP 8 10.2 x 7.1 x 4.83mm 4.83mm
全新
RS庫存編號 193-8455
製造零件編號CY62146ELL-45ZSXI
HK$87.39
單位
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庫存編號 165-9425
製造零件編號DS1220AD-150+
HK$110.94
毎管:14 個
單位
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庫存編號 170-2176
製造零件編號IS61C25616AL-10TLI
BrandISSI
HK$32.267
Each (In a Tray of 135)
單位
4Mbit 256k x 16 256k 16bit 10ns 18bit - - - Surface Mount TSOP 44 18.52 x 10.29 x 1.05mm 1.05mm
RS庫存編號 901-5723
製造零件編號R1LV1616RBG-5SI#B0
HK$231.35
單位
16Mbit 1M x 16 bit 1M 16bit 55ns - - Yes Asynchronous Surface Mount FBGA 48 7.5 x 8.5 x 0.8mm 0.8mm
RS庫存編號 797-9379
製造零件編號DS1225AB-200+
HK$144.99
單位
64kbit 8K x 8 bit 8K 8bit 70ns 8bit - Yes - Through Hole EDIP 28 39.37 x 18.29 x 10.67mm 10.67mm
全新
RS庫存編號 192-1226
製造零件編號DS1245AB-70IND+
HK$278.85
毎管:11 個
單位
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庫存編號 171-0970
製造零件編號CY62137FV30LL-45BVXI
HK$22.59
Each (In a Tray of 480)
單位
2Mbit 128K x 16 bit 128K 16bit 45ns 16bit - Yes - Surface Mount VFBGA 48 6 x 8 x 0.81mm 0.81mm
RS庫存編號 181-8359
製造零件編號CY7C1069G30-10ZSXI-CYP
HK$404.83
單位
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庫存編號 170-2049
製造零件編號IS62C1024AL-35QLI
BrandISSI
HK$17.966
Each (In a Tray of 84)
單位
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庫存編號 170-0753
製造零件編號AS7C256A-12JIN
HK$17.03
毎管:25 個
單位
256kbit 32K words x 8 bit 32K 8bit 12ns 15bit - Yes Asynchronous Surface Mount SOJ 28 18.54 x 7.75 x 2.67mm 2.67mm
RS庫存編號 177-5518
製造零件編號AS6C1008-55SIN
HK$17.111
毎管:22 個
單位
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庫存編號 912-2859
製造零件編號23LC1024-I/ST
BrandMicrochip
HK$17.023
毎管:100 個
單位
1Mbit 128K words x 8 bit 128K 8bit - 24bit 20MHz Yes Synchronous Surface Mount TSSOP 8 3.1 x 4.5 x 1.05mm 1.05mm
RS庫存編號 171-0981
製造零件編號CY62167DV30LL-70BVI
HK$77.95
Each (In a Tray of 210)
單位
16Mbit 1M x 16 bit 1M 16bit 70ns 16bit - Yes - Surface Mount VFBGA 48 8 x 9.5 x 0.81mm 0.81mm
RS庫存編號 391-729
製造零件編號IS62C1024AL-35TLI
BrandISSI
HK$22.365
/個 (每包:2個)
單位
1Mbit 128K words x 8 bit 128K 8bit 35ns 17bit - Yes Asynchronous Surface Mount TSOP 32 8.1 x 18.5 x 0.95mm 0.95mm
RS庫存編號 181-8377
製造零件編號CY14B101PA-SFXI
HK$94.63
單位
1Mbit 128K x 8 bit 128K 8bit - - 104MHz Yes Synchronous Surface Mount SOIC 16 10.49 x 7.59 x 2.36mm 2.36mm
RS庫存編號 177-5533
製造零件編號AS6C1008-55TIN
HK$15.347
Each (In a Tray of 156)
單位
1Mbit 128K words x 8 bit 128K 8bit 55ns 17bit - Yes Asynchronous Surface Mount TSOP 32 8 x 18.4 x 1mm 1mm
RS庫存編號 391-713
製造零件編號IS61C256AL-12TLI
BrandISSI
HK$9.898
/個 (每包:4個)
單位
256kbit 32K words x 8 bit 32K 8bit 12ns 15bit - Yes Asynchronous Surface Mount TSOP 28 8.1 x 11.9 x 1mm 1mm
RS庫存編號 146-3211
製造零件編號47L04-I/P
BrandMicrochip
HK$6.761
毎管:60 個
單位
4kbit 512K x 8 - 8bit - - 1000kHz Yes Synchronous Through Hole DIP 8 10.2 x 7.1 x 4.83mm 4.83mm
RS庫存編號 125-6981
製造零件編號CY62148EV30LL-45BVXI
HK$51.00
單位
4Mbit 512K x 8 bit 512K 8bit 45ns 8bit - Yes - Surface Mount VFBGA 36 6 x 8 x 0.84mm 0.84mm