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. 889-5538
Fabrikantnummer23LC1024-I/SN
FabrikantMicrochip
€ 1,707
Each (In a Tube of 100)
Aantal stuks
1Mbit 128K words x 8 bit 128Kk 8bit 5ns 24bit 20MHz Yes Synchronous Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 1.5mm
RS-stocknr. 912-2714
Fabrikantnummer23LC1024-I/P
FabrikantMicrochip
€ 1,813
Each (In a Tube of 60)
Aantal stuks
1Mbit 128K words x 8 bit 128K 8bit 5ns 24bit 20MHz Yes Synchronous Through Hole PDIP 8 10.16 x 7.11 x 4.95mm 4.95mm
RS-stocknr. 178-4043
Fabrikantnummer23LC512-I/SN
FabrikantMicrochip
€ 1,226
Each (In a Tube of 100)
Aantal stuks
512kbit 64K x 8 bit 64K 8bit 5ns 8bit 20MHz Yes Synchronous Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 1.5mm
RS-stocknr. 769-7345
Fabrikantnummer23LC1024-I/P
FabrikantMicrochip
€ 1,91
Each (In a Pack of 2)
Aantal stuks
1Mbit 128K words x 8 bit 128Kk 8bit 5ns 24bit 20MHz Yes Synchronous Through Hole PDIP 8 0.4 x 0.28 x 0.195in 4.95mm
RS-stocknr. 798-5208
Fabrikantnummer23LC512-I/SN
FabrikantMicrochip
€ 1,322
Each (In a Pack of 5)
Aantal stuks
512kbit 64K x 8 bit 64K 8bit 5ns 8bit 20MHz Yes Synchronous Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 1.5mm
RS-stocknr. 769-7342
Fabrikantnummer23LC1024-I/SN
FabrikantMicrochip
€ 1,865
Each (In a Pack of 2)
Aantal stuks
1Mbit 128K words x 8 bit 128Kk 8bit 5ns 24bit 20MHz Yes Synchronous Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 1.5mm
RS-stocknr. 912-6710
Fabrikantnummer23LCV1024-I/P
FabrikantMicrochip
€ 2,062
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. 769-7349
Fabrikantnummer23LC1024-I/ST
FabrikantMicrochip
€ 1,90
Each (In a Pack of 2)
Aantal stuks
1Mbit 128K words x 8 bit 128Kk 8bit - 24bit 20MHz Yes Synchronous Surface Mount TSSOP 8 3.1 x 4.5 x 1.05mm 1.05mm
RS-stocknr. 666-8148
Fabrikantnummer23K256-I/SN
FabrikantMicrochip
€ 0,972
Each (In a Pack of 5)
Aantal stuks
256kbit 32768 words x 8 bit 32K 8bit 25ns 16bit 20MHz Yes Synchronous Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 1.25mm
RS-stocknr. 803-2272
Fabrikantnummer23LCV1024-I/P
FabrikantMicrochip
€ 2,172
Each (In a Pack of 5)
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. 912-2859
Fabrikantnummer23LC1024-I/ST
FabrikantMicrochip
€ 1,742
Each (In a Tube of 100)
Aantal stuks
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-stocknr. 803-2181
Fabrikantnummer23LCV1024-I/SN
FabrikantMicrochip
€ 2,126
Each (In a Pack of 5)
Aantal stuks
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes - Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 1.25mm
RS-stocknr. 889-5648
Fabrikantnummer23K256-I/SN
FabrikantMicrochip
€ 0,888
Each (In a Tube of 100)
Aantal stuks
256kbit 32768 words x 8 bit 32K 8bit 25ns 16bit 20MHz Yes Synchronous Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 1.25mm
RS-stocknr. 912-6849
Fabrikantnummer23LCV1024-I/SN
FabrikantMicrochip
€ 1,959
Each (In a Tube of 100)
Aantal stuks
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes - Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 1.25mm
RS-stocknr. 178-4953
Fabrikantnummer23LCV512-I/P
FabrikantMicrochip
€ 1,514
Each (In a Tube of 60)
Aantal stuks
512kbit 64K x 8 bit - - 5ns 16bit 20MHz Yes - Through Hole PDIP 8 10.16 x 7.11 x 4.95mm 4.95mm
RS-stocknr. 178-4005
Fabrikantnummer23K640-I/SN
FabrikantMicrochip
€ 0,509
Each (In a Tube of 100)
Aantal stuks
64kbit 8192 words x 8 bit 8K 8bit 25ns 16bit 20MHz Yes Synchronous Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 1.25mm
RS-stocknr. 151-1491
Fabrikantnummer47L16-I/P
FabrikantMicrochip
€ 0,75
Each (In a Pack of 10)
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 803-2193
Fabrikantnummer23LCV512-I/ST
FabrikantMicrochip
€ 1,542
Each (In a Pack of 5)
Aantal stuks
512kbit 64K x 8 bit - 8bit 5ns 16bit 20MHz Yes - Surface Mount TSSOP 8 3.1 x 4.5 x 1.05mm 1.05mm
RS-stocknr. 146-3213
Fabrikantnummer47L04-I/ST
FabrikantMicrochip
€ 0,539
Each (In a Tube of 100)
Aantal stuks
4kbit 512K x 8 - 8bit - - 1000kHz Yes Synchronous Surface Mount TSSOP 8 3.1 x 4.5 x 1.05mm 1.05mm
RS-stocknr. 666-8144
Fabrikantnummer23K256-I/P
FabrikantMicrochip
€ 1,028
Each (In a Pack of 5)
Aantal stuks
256kbit 32768 words x 8 bit 32K 8bit 25ns 16bit 20MHz Yes Synchronous Through Hole PDIP 8 9.27 x 6.35 x 3.3mm 3.3mm