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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Omschrijving Prijs 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-stocknr. 744-4570
FabrikantnummerAS7C34096A-10TIN
FabrikantAlliance Memory
€ 4,92
Each
Aantal stuks
4Mbit 512K x 8 bit 512K 8bit 10ns 19bit - Yes Asynchronous Surface Mount TSOP 44 18.52 x 10.26 x 1.05mm 1.05mm
RS-stocknr. 188-5328
FabrikantnummerCY62158ELL-45ZSXI
€ 8,428
Each (In a Tray of 135)
Aantal stuks
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
RS-stocknr. 145-3623
FabrikantnummerN25S830HAS22I
FabrikantON Semiconductor
€ 1,357
Each (In a Tube of 100)
Aantal stuks
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-stocknr. 912-6710
Fabrikantnummer23LCV1024-I/P
FabrikantMicrochip
€ 2,148
Each (In a Tube of 60)
Aantal stuks
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes - Through Hole PDIP 8 10.16 x 7.11 x 4.95mm 4.95mm
RS-stocknr. 125-7542
FabrikantnummerCY7C199D-10VXI
€ 1,872
Each (In a Pack of 5)
Aantal stuks
256kbit 32K x 8 bit 32K 8bit 15ns 8bit - Yes - Surface Mount SOJ 28 18.03 x 7.62 x 0.254mm 0.254mm
RS-stocknr. 901-5837
FabrikantnummerRMLV0408EGSA-4S2#AA0
€ 10,44
Each
Aantal stuks
4Mbit 512K x 8 bit 512K 8bit 45ns 8bit 1MHz Yes - Surface Mount TSOP 32 11.9 x 8.1 x 1mm 1mm
RS-stocknr. 538-287
FabrikantnummerAS7C256A-12JIN
FabrikantAlliance Memory
€ 1,86
Each (In a Pack of 2)
Aantal stuks
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-stocknr. 181-7440
FabrikantnummerCY62128EV30LL-45ZXI
€ 1,052
Each (In a Tray of 234)
Aantal stuks
1Mbit 128K x 8 bit 128K 8bit 45ns 8bit - Yes - Surface Mount TSOP 32 18.3 x 8.2 x 1.05mm 1.05mm
RS-stocknr. 391-719
FabrikantnummerIS61C256AL-12JLI
FabrikantISSI
€ 0,978
Each (In a Pack of 4)
Aantal stuks
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-stocknr. 797-9366
FabrikantnummerDS1220AD-150+
FabrikantMaxim Integrated
€ 12,90
Each
Aantal stuks
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-stocknr. 901-5815
FabrikantnummerR1LV0108ESN-5SI#B0
€ 3,335
Each (In a Bag of 2)
Aantal stuks
1Mbit 128K x 8 bit 128K 8bit 55ns 8bit 1MHz Yes - Surface Mount SOP 32 20.95 x 11.5 x 2.85mm 2.85mm
RS-stocknr. 123-8836
FabrikantnummerN01S830BAT22I
FabrikantON Semiconductor
€ 1,815
Each (In a Pack of 2)
Aantal stuks
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes Synchronous Surface Mount TSSOP 8 4.4 x 3 x 0.9mm 0.9mm
RS-stocknr. 193-8456
FabrikantnummerCY621472E30LL-45ZSXI
€ 4,843
Each (In a Tray of 135)
Aantal stuks
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-stocknr. 170-2193
FabrikantnummerIS62WV51216BLL-55TLI
FabrikantISSI
€ 5,173
Each (In a Tray of 135)
Aantal stuks
8Mbit 512k x 16 512k 16bit 55ns 19bit - Yes - Surface Mount TSOP 44 18.52 x 10.29 x 1.05mm 1.05mm
RS-stocknr. 901-5843
FabrikantnummerRMLV0414EGSB-4S2#AA0
€ 12,35
Each
Aantal stuks
4Mbit 256K x 16 bit 256K 16bit 45ns 16bit 1MHz Yes - Surface Mount TSOP 44 18.51 x 10.26 x 1mm 1mm
RS-stocknr. 181-7441
FabrikantnummerCY62147EV30LL-45ZSXI
€ 2,572
Each (In a Tray of 135)
Aantal stuks
4Mbit 256K x 16 bit 256K 16bit 45ns 16bit - Yes - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
RS-stocknr. 193-8457
FabrikantnummerCY621472E30LL-45ZSXI
€ 5,33
Each (In a Pack of 2)
Aantal stuks
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-stocknr. 145-3848
FabrikantnummerN01S830BAT22I
FabrikantON Semiconductor
€ 1,766
Each (In a Tube of 100)
Aantal stuks
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes Synchronous Surface Mount TSSOP 8 4.4 x 3 x 0.9mm 0.9mm
RS-stocknr. 171-0970
FabrikantnummerCY62137FV30LL-45BVXI
€ 2,354
Each (In a Tray of 480)
Aantal stuks
2Mbit 128K x 16 bit 128K 16bit 45ns 16bit - Yes - Surface Mount VFBGA 48 6 x 8 x 0.81mm 0.81mm
RS-stocknr. 182-3290
FabrikantnummerCY7C1041G-10VXI
€ 5,317
Each (In a Tube of 17)
Aantal stuks
4Mbit 256K x 16 bit 256K 16bit 10ns - 100MHz - Asynchronous Surface Mount SOJ 44 1.13 x 0.405 x 0.11in 2.79mm
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