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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Beskrivning Pris 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-artikelnummer 125-6934
Tillv. art.nrCY14B104NA-ZS25XI
310,20 kr
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Enheter
4Mbit 256K x 16 bit, 512K x 8 bit 256K, 512K 8 bit, 16 bit 25ns 8 bit, 16 bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
RS-artikelnummer 170-2051
Tillv. art.nrIS61WV12816BLL-12TLI
VarumärkeISSI
39,101 kr
Each (In a Tray of 135)
Enheter
2Mbit 128K words x 16 bit 128K 16bit 12ns 17bit - Yes Asynchronous Surface Mount TSOP 44 18.52 x 10.29 x 1.05mm 1.05mm
RS-artikelnummer 538-198
Tillv. art.nrAS7C34098A-12TIN
VarumärkeAlliance Memory
47,05 kr
Each
Enheter
4Mbit 256K words x 16 bit 256K 16bit 12ns 18bit - Yes Asynchronous Surface Mount TSOP 44 18.54 x 10.29 x 1.05mm 1.05mm
RS-artikelnummer 193-8453
Tillv. art.nrCY62126EV30LL-45ZSXIT
20,97 kr
Each (In a Pack of 5)
Enheter
1Mbit 64 k x 16 bit 64 k 16bit 45ns 16bit 1MHz Yes Asynchronous Surface Mount TSOP II 44 18.517 x 10.262 x 1.044mm 1.04mm
RS-artikelnummer 170-0894
Tillv. art.nrAS7C31024B-12TCN
VarumärkeAlliance Memory
21,264 kr
Each (In a Tray of 156)
Enheter
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
RS-artikelnummer 170-0735
Tillv. art.nrAS6C62256-55SIN
VarumärkeAlliance Memory
16,11 kr
Each (In a Tube of 25)
Enheter
256kbit 32K words x 8 bit 32K 8bit 55ns 15bit - Yes Asynchronous Surface Mount SOP 28 18.49 x 8.64 x 2.49mm 2.49mm
RS-artikelnummer 126-6981
Tillv. art.nrRMLV0816BGBG-4S2#AC0
157,90 kr
Each
Enheter
8Mbit 512K words x 16 bit 512K 16bit 45ns 19bit - Yes - Surface Mount FBGA 48 7.58 x 8.58 x 0.8mm 0.8mm
Nytt
RS-artikelnummer 198-8003
Tillv. art.nrCY7C1021D-10ZSXIT
22,263 kr
Each (On a Reel of 1000)
Enheter
1024kbit 64K x 16 65536 16bit 10ns - - - - - - - - -
RS-artikelnummer 182-3377
Tillv. art.nrCY7C1041GN30-10BVXI
44,875 kr
Each (In a Pack of 2)
Enheter
- - - - - - - - - - - - - -
RS-artikelnummer 744-4549
Tillv. art.nrAS7C1026B-12TCN
VarumärkeAlliance Memory
18,04 kr
Each
Enheter
1Mbit 64K x 16 bit 64K 16bit 12ns 16bit - Yes Asynchronous Surface Mount TSOP 44 18.52 x 10.26 x 1.05mm 1.05mm
RS-artikelnummer 538-271
Tillv. art.nrAS6C8016-55ZIN
VarumärkeAlliance Memory
61,63 kr
Each
Enheter
8Mbit 512K words x 16 bit 512K 16bit 55ns 19bit - Yes Asynchronous Surface Mount TSOP 44 18.42 x 10.16 x 1mm 1mm
RS-artikelnummer 538-164
Tillv. art.nrAS6C4008-55TIN
VarumärkeAlliance Memory
37,22 kr
Each
Enheter
4Mbit 512K words x 8 bit 512K 8bit 55ns 19bit - Yes Asynchronous Surface Mount TSOP 32 8 x 18.4 x 1mm 1mm
RS-artikelnummer 901-5764
Tillv. art.nrR1RW0408DGE-2LR#B0
198,94 kr
Each
Enheter
4Mbit 512K x 8 bit 512K 8bit 12ns 8bit 1MHz - - Surface Mount SOJ 36 23.62 x 10.29 x 3.05mm 3.05mm
RS-artikelnummer 193-8472
Tillv. art.nrCY7C199D-10VXIT
17,516 kr
Each (In a Pack of 5)
Enheter
256kbit 32 k x 8 bit 32 k 8bit 10ns 8bit 1MHz - Asynchronous Through Hole SOJ 85 11.9 x 8.1 x 1mm 1mm
Nytt
RS-artikelnummer 198-7995
Tillv. art.nrCY62128EV30LL-45ZAXIT
19,84 kr
Each (In a Pack of 5)
Enheter
1024kbit 128K x 8 128K 8bit 45ns - - - - - - - - -
RS-artikelnummer 146-8883
Tillv. art.nr47L16-I/SN
VarumärkeMicrochip
6,576 kr
Each (In a Pack of 10)
Enheter
16kbit 2048K x 8 - 8bit - - 1000kHz Yes Synchronous Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 1.25mm
RS-artikelnummer 171-0986
Tillv. art.nrCY7C1011DV33-10ZSXI
31,705 kr
Each (In a Tray of 270)
Enheter
2Mbit 128K x 16 bit 128K 16bit 10ns 16bit - Yes Asynchronous Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
RS-artikelnummer 125-6981
Tillv. art.nrCY62148EV30LL-45BVXI
55,32 kr
Each
Enheter
4Mbit 512K x 8 bit 512K 8bit 45ns 8bit - Yes - Surface Mount VFBGA 36 6 x 8 x 0.84mm 0.84mm
RS-artikelnummer 171-0969
Tillv. art.nrCY62137EV30LL-45ZSXI
18,098 kr
Each (In a Tray of 405)
Enheter
2Mbit 128K x 16 bit 128K 16bit 45ns 16bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
RS-artikelnummer 170-2048
Tillv. art.nrIS62C256AL-45TLI
VarumärkeISSI
10,409 kr
Each (In a Tray of 234)
Enheter
256kbit 32K words x 8 bit 32K 8bit 45ns 15bit - Yes Asynchronous Surface Mount TSOP 28 8.1 x 11.9 x 1mm 1mm