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

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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 125-7518
Référence fabricantCY62177EV30LL-55ZXI
34,85 €
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Unité
32Mbit 2M x 16 bit 2M 16bit 55ns 16bit - Yes - Surface Mount TSOP 48 18.4 x 12 x 1.05mm 1.05mm
N° de stock RS 171-0984
Référence fabricantCY62177EV30LL-55ZXI
34,269 €
Each (In a Tray of 96)
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32Mbit 2M x 16 bit 2M 16bit 55ns 16bit - Yes - Surface Mount TSOP 48 18.4 x 12 x 1.05mm 1.05mm
N° de stock RS 170-0737
Référence fabricantAS6C8008-55ZIN
5,095 €
Each (In a Tray of 135)
Unité
8Mbit 1024k x 8 bit 1M 8bit 55ns 20bit - Yes Asynchronous Surface Mount TSOP 44 18.42 x 10.16 x 1mm 1mm
N° de stock RS 538-154
Référence fabricantAS6C8008-55ZIN
5,97 €
Each
Unité
8Mbit 1024k x 8 bit 1M 8bit 55ns 20bit - Yes Asynchronous Surface Mount TSOP 44 18.42 x 10.16 x 1mm 1mm
N° de stock RS 538-170
Référence fabricantAS6C1008-55SIN
1,935 €
Each (In a Pack of 2)
Unité
1Mbit 128k x 8 bit 128k 8bit 55ns 17bit - Yes Asynchronous Surface Mount SOP 32 20.75 x 11.3 x 2.82mm 2.82mm
N° de stock RS 177-5518
Référence fabricantAS6C1008-55SIN
1,766 €
Each (In a Tube of 22)
Unité
1Mbit 128k x 8 bit 128k 8bit 55ns 17bit - Yes Asynchronous Surface Mount SOP 32 20.75 x 11.3 x 2.82mm 2.82mm
N° de stock RS 170-2073
Référence fabricantIDT70V28L20PFGI
MarqueIDT
65,935 €
Each (In a Tray of 6)
Unité
1024kbit 64k x 16 bit 64k 16bit 20ns 16bit - Yes Asynchronous Surface Mount TQFP 100 14 x 14 x 1.4mm 1.4mm
N° de stock RS 170-2180
Référence fabricantIS61WV102416BLL-10TLI
MarqueISSI
17,403 €
Each (In a Tray of 96)
Unité
16Mbit 1M x 16 bit 1M 16bit 10ns 20bit - Yes Asynchronous Surface Mount TSOP 48 18.6 x 12.2 x 1.05mm 1.05mm
N° de stock RS 714-4801
Référence fabricantIDT70V28L20PFGI
MarqueIDT
72,52 €
Each
Unité
1024kbit 64k x 16 bit 64k 16bit 20ns 16bit - Yes Asynchronous Surface Mount TQFP 100 14 x 14 x 1.4mm 1.4mm
N° de stock RS 811-5175
Référence fabricantIS61WV102416BLL-10TLI
MarqueISSI
18,23 €
Each
Unité
16Mbit 1M x 16 bit 1M 16bit 10ns 20bit - Yes Asynchronous Surface Mount TSOP 48 18.6 x 12.2 x 1.05mm 1.05mm
N° de stock RS 170-2049
Référence fabricantIS62C1024AL-35QLI
MarqueISSI
1,759 €
Each (In a Tray of 84)
Unité
1Mbit 128k x 8 bit 128k 8bit 35ns 17bit - Yes Asynchronous Surface Mount SOP 32 20.75 x 11.43 x 3mm 3mm
N° de stock RS 823-4440
Référence fabricant23K256-E/ST
MarqueMicrochip
1,002 €
Each (In a Pack of 5)
Unité
256kbit 32768 x 8 bit 32768 8bit 50ns 16bit 20MHz - Synchronous Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 1.05mm
N° de stock RS 178-4109
Référence fabricant23K256-E/ST
MarqueMicrochip
0,968 €
Each (In a Tube of 100)
Unité
256kbit 32768 x 8 bit 32768 8bit 50ns 16bit 20MHz - Synchronous Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 1.05mm
N° de stock RS 391-680
Référence fabricantIS62C1024AL-35QLI
MarqueISSI
1,735 €
Each (In a Pack of 2)
Unité
1Mbit 128k x 8 bit 128k 8bit 35ns 17bit - Yes Asynchronous Surface Mount SOP 32 20.75 x 11.43 x 3mm 3mm
N° de stock RS 742-4692
Référence fabricantIDT6116LA25SOGI
MarqueIDT
4,35 €
Each
Unité
16kbit 2k x 8 bit 2k 8bit 25ns 11bit - Yes Asynchronous Surface Mount SOIC 24 15.4 x 7.6 x 2.34mm 2.34mm
N° de stock RS 538-237
Référence fabricantAS7C1024C-12JIN
4,105 €
Each (In a Pack of 2)
Unité
1Mbit 128k x 8 bit 128k 8bit 12ns 17bit - Yes Asynchronous Surface Mount SOJ 32 21.08 x 10.29 x 2.92mm 2.92mm
N° de stock RS 170-0736
Référence fabricantAS6C62256-55PCN
1,97 €
Each (In a Tube of 15)
Unité
256kbit 32k x 8 bit 32k 8bit 55ns 15bit - Yes Asynchronous Through Hole PDIP 28 36.32 x 13.21 x 3.81mm 3.81mm
N° de stock RS 538-160
Référence fabricantAS6C4008-55SIN
3,77 €
Each
Unité
4Mbit 512k x 8 bit 512k 8bit 55ns 19bit - Yes Asynchronous Surface Mount SOP 32 20.75 x 11.3 x 2.82mm 2.82mm
N° de stock RS 170-2075
Référence fabricantIDT7132LA35PDG
MarqueIDT
10,844 €
Each (In a Tube of 7)
Unité
16kbit 2k x 8 bit 2k 8bit 35ns 8bit - Yes Asynchronous Through Hole PDIP 48 61.7 x 15.24 x 3.8mm 3.8mm
N° de stock RS 188-5328
Référence fabricantCY62158ELL-45ZSXI
8,141 €
Each (In a Tray of 135)
Unité
8Mbit 512k x 16 bit 512k 16bit 45ns 8bit 1MHz Yes - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm