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 61 - 80 des 506 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 181-7445
Référence fabricantCY7C1021DV33-10ZSXIT
1,458 €
Each (On a Reel of 1000)
Unité
1Mbit 64K x 16 bit 64K 16bit 10ns - - - Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
N° de stock RS 182-3295
Référence fabricantCY7C1049GN-10VXI
4,238 €
Each (In a Tube of 19)
Unité
4Mbit 512K x 16 bit 512K 8bit 10ns - 100MHz - Asynchronous Surface Mount SOJ 36 0.93 x 0.4 x 0.12mm 0.12mm
N° de stock RS 182-3290
Référence fabricantCY7C1041G-10VXI
5,317 €
Each (In a Tube of 17)
Unité
4Mbit 256K x 16 bit 256K 16bit 10ns - 100MHz - Asynchronous Surface Mount SOJ 44 1.13 x 0.405 x 0.11in 2.79mm
N° de stock RS 189-9239
Référence fabricantDS1245Y-70IND+
28,41 €
Each
Unité
1Mbit 128K x 8 bit 128K 8bit 70ns 17bit - Yes Asynchronous Through Hole EDIP 32 44.2 x 18.8 x 9.9mm 9.9mm
N° de stock RS 901-5843
Référence fabricantRMLV0414EGSB-4S2#AA0
12,35 €
Each
Unité
4Mbit 256K x 16 bit 256K 16bit 45ns 16bit 1MHz Yes - Surface Mount TSOP 44 18.51 x 10.26 x 1mm 1mm
N° de stock RS 126-6966
Référence fabricantR1LV0108ESA-5SI#B1
3,36 €
Each
Unité
1Mbit 128K words x 8 bit 128K 8bit 55ns 17bit - Yes - Surface Mount sTSOP 32 11.9 x 8.1 x 1mm 1mm
N° de stock RS 124-2947
Référence fabricantCY62167EV30LL-45BVXI
8,71 €
Each
Unité
16Mbit 1M x 16 bit, 2M x 8 bit 1M, 2M 8 bit, 16 bit 45ns 8 bit, 16 bit 1MHz Yes - Surface Mount VFBGA 48 6 x 8 x 0.79mm 0.79mm
N° de stock RS 193-8466
Référence fabricantCY7C1049G30-10VXI
5,074 €
Each (In a Tube of 19)
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 125-6975
Référence fabricantCY62137EV30LL-45ZSXI
1,85 €
Each (In a Pack of 2)
Unité
2Mbit 128K x 16 bit 128K 16bit 45ns 16bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
N° de stock RS 188-5327
Référence fabricantCY62157EV30LL-45ZXI
9,026 €
Each (In a Tray of 96)
Unité
8Mbit 512k x 16 bit 512k 16bit 45ns - 1MHz Yes - Surface Mount TSOP 48 18.51 x 10.26 x 1.04mm 1.04mm
Nouveau
N° de stock RS 200-9837
Référence fabricant48L640-I/SN
MarqueMicrochip
0,948 €
Each (In a Tube of 100)
Unité
64kbit 8 k x 8 8, 192 8bit 10ns - - - - - - - - -
N° de stock RS 178-4953
Référence fabricant23LCV512-I/P
MarqueMicrochip
1,55 €
Each (In a Tube of 60)
Unité
512kbit 64K x 8 bit - - 5ns 16bit 20MHz Yes - Through Hole PDIP 8 10.16 x 7.11 x 4.95mm 4.95mm
N° de stock RS 170-0741
Référence fabricantAS7C34098A-12JIN
4,123 €
Each (In a Tube of 16)
Unité
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
N° de stock RS 170-0894
Référence fabricantAS7C31024B-12TCN
2,056 €
Each (In a Tray of 156)
Unité
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
N° de stock RS 178-4054
Référence fabricant23LCV512-I/SN
MarqueMicrochip
1,424 €
Each (In a Tube of 100)
Unité
512kbit 64K x 8 bit - - 5ns 16bit 20MHz Yes - Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 1.25mm
N° de stock RS 391-729
Référence fabricantIS62C1024AL-35TLI
MarqueISSI
1,99 €
Each (In a Pack of 2)
Unité
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
N° de stock RS 803-2272
Référence fabricant23LCV1024-I/P
MarqueMicrochip
2,228 €
Each (In a Pack of 5)
Unité
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes - Through Hole PDIP 8 10.16 x 7.11 x 4.95mm 4.95mm
N° de stock RS 170-0924
Référence fabricantAS7C38098A-10BIN
11,212 €
Each (In a Tray of 480)
Unité
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
N° de stock RS 124-2946
Référence fabricantCY62158EV30LL-45ZSXI
6,76 €
Each
Unité
8Mbit 1024K x 8 bit 1024K 8bit 45ns 8bit 1MHz Yes - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
N° de stock RS 391-725
Référence fabricantIS61C1024AL-12KLI
MarqueISSI
1,925 €
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 10.29 x 3.75mm 3.75mm