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. It’s 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 computer’s 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
• Reliability
Disadvantages include:
• Capacity
• Varying power consumption
Can be found in the following:
• Computers
• Workstations
• Routers
• LCD screens and printers
• Electronics
• Microprocessor

...
Voir plus Voir moins

Filtres

Afficher 41 - 60 des 507 produits
Nombre de résultats par page
Description Prix 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
N° de stock RS 170-2188
Référence fabricantIS62WV1288BLL-55TLI
MarqueISSI
1,573 €
Each (In a Tray of 156)
Unité
1Mbit 128k x 8 128k 8bit 55ns 17bit - Yes - Surface Mount TSOP 32 18.5 x 8.1 x 0.95mm 0.95mm
N° de stock RS 170-2048
Référence fabricantIS62C256AL-45TLI
MarqueISSI
1,007 €
Each (In a Tray of 234)
Unité
256kbit 32K words x 8 bit 32K 8bit 45ns 15bit - Yes Asynchronous Surface Mount TSOP 28 8.1 x 11.9 x 1mm 1mm
N° de stock RS 744-4561
Référence fabricantAS6C4008-55PCN
4,14 €
Each
Unité
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
N° de stock RS 125-6980
Référence fabricantCY62148ESL-55ZAXI
6,10 €
Each
Unité
4Mbit 512K x 8 bit 512K 8bit 55ns 8bit - Yes - Surface Mount STSOP 32 11.9 x 8.1 x 1.05mm 1.05mm
N° de stock RS 170-0739
Référence fabricantAS6C4008-55TIN
2,835 €
Each (In a Tray of 156)
Unité
4Mbit 512K words x 8 bit 512K 8bit 55ns 19bit - Yes Asynchronous Surface Mount TSOP 32 8 x 18.4 x 1mm 1mm
N° de stock RS 391-731
Référence fabricantIS61C1024AL-12JLI
MarqueISSI
2,02 €
Each (In a Pack of 2)
Unité
1Mbit 128K words x 8 bit 128K 8bit 12ns 17bit - Yes Asynchronous Surface Mount SOJ 32 21.08 x 7.75 x 2.67mm 2.67mm
N° de stock RS 538-255
Référence fabricantAS7C256A-12TIN
1,14 €
Each (In a Pack of 2)
Unité
256kbit 32K words x 8 bit 32K 8bit 12ns 15bit - Yes Asynchronous Surface Mount TSOP 28 8 x 11.8 x 1.05mm 1.05mm
N° de stock RS 193-8468
Référence fabricantCY7C1049G30-10VXI
5,585 €
Each (In a Pack of 2)
Unité
4Mbit 512 k x 8 bit 512 k 8bit 10ns 8bit 100MHz - Asynchronous Through Hole SOJ 36 0.92 x 0.395 x 0.103in 2.62mm
N° de stock RS 391-707
Référence fabricantIS61LV25616AL-10TLI
MarqueISSI
4,26 €
Each
Unité
4Mbit 256K words x 16 bit 256K 16bit 10ns 18bit - Yes Asynchronous Surface Mount TSOP 44 18.52 x 10.29 x 1.05mm 1.05mm
N° de stock RS 193-8470
Référence fabricantCY7C10612G30-10ZSXI
17,05 €
Each
Unité
16Mbit 1 M x 16 bit 1 M 16bit 10ns 16bit 100MHz - Asynchronous Surface Mount TSOP II 54 22.313 x 10.058 x 0.95mm 0.95mm
N° de stock RS 181-7443
Référence fabricantCY62148EV30LL-45ZSXI
3,147 €
Each (In a Tray of 117)
Unité
4Mbit 512K x 8 bit 512K 8bit 45ns 8bit - Yes - Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm
N° de stock RS 170-0922
Référence fabricantAS7C316096A-10TIN
14,541 €
Each (In a Tray of 156)
Unité
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
N° de stock RS 145-3848
Référence fabricantN01S830BAT22I
1,808 €
Each (In a Tube of 100)
Unité
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes Synchronous Surface Mount TSSOP 8 4.4 x 3 x 0.9mm 0.9mm
N° de stock RS 125-7533
Référence fabricantCY7C1021DV33-10ZSXI
1,368 €
Each (In a Pack of 5)
Unité
1Mbit 64K x 16 bit 64K 16bit 10ns 16bit - Yes Asynchronous Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
N° de stock RS 901-5767
Référence fabricantR1RW0408DGE-2PI#B0
17,61 €
Each
Unité
4Mbit 512K x 8 bit 512K 8bit 12ns 8bit 1MHz - - Surface Mount SOJ 36 23.62 x 10.29 x 2.75mm 2.75mm
N° de stock RS 827-2571
Référence fabricantCY7C1019D-10ZSXI
4,422 €
Each (In a Pack of 5)
Unité
1Mbit 128k x 8 128K 8bit 10ns 17bit 100MHz Yes Asynchronous Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm
N° de stock RS 188-5323
Référence fabricantCY62148ELL-45ZSXI
5,37 €
Each (In a Tray of 117)
Unité
4Mbit 512k x 8 bit 512k 8bit 45ns - 1MHz Yes - Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm
N° de stock RS 181-7444
Référence fabricantCY62256VNLL-70ZXI
1,194 €
Each (In a Tray of 234)
Unité
256kbit 32K x 8 bit 32K 8bit 70ns - - Yes - Surface Mount TSOP 28 11.9 x 8.1 x 1.02mm 1.02mm
N° de stock RS 178-4051
Référence fabricant23LCV1024-I/ST
MarqueMicrochip
2,056 €
Each (In a Tube of 100)
Unité
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes - Surface Mount TSSOP 8 3.1 x 4.5 x 1.05mm 1.05mm
N° de stock RS 538-259
Référence fabricantAS7C34096A-12JIN
4,55 €
Each
Unité
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