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. Its 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 computers 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 ReliabilityDisadvantages include: Capacity Varying power consumptionCan be found in the following: Computers Workstations Routers LCD screens and printers Electronics Microprocessor

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Description Price 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 Stock No. 170-2047
Mfr. Part No.IS62C256AL-45ULI
BrandISSI
MYR6.282
Each (In a Tray of 120)
units
256kbit 32K words x 8 bit 32K 8bit 45ns 15bit - Yes Asynchronous Surface Mount SOP 28 18.24 x 8.53 x 2.84mm 2.84mm
RS Stock No. 901-5723
Mfr. Part No.R1LV1616RBG-5SI#B0
MYR199.38
Each
units
16Mbit 1M x 16 bit 1M 16bit 55ns - - Yes Asynchronous Surface Mount FBGA 48 7.5 x 8.5 x 0.8mm 0.8mm
RS Stock No. 392-362
Mfr. Part No.IS61LV6416-10TL
BrandISSI
MYR9.855
Each (In a Pack of 2)
units
1Mbit 64K words x 16 bit 64K 16bit 10ns 16bit - Yes Asynchronous Surface Mount TSOP 44 18.52 x 10.29 x 1.05mm 1.05mm
New
RS Stock No. 198-8005
Mfr. Part No.CY7C1041GN30-10ZSXIT
MYR16.844
Each (On a Reel of 1000)
units
4096kbit 256K x 16 256K 16bit 10ns - - - - - - - - -
RS Stock No. 714-4804
Mfr. Part No.IDT70V27L15PFG
BrandIDT
MYR300.98
Each
units
512kbit 32K x 16 bit 32K 16bit 15ns 16bit - Yes Asynchronous Surface Mount TQFP 100 14 x 14 x 1.4mm 1.4mm
RS Stock No. 146-3206
Mfr. Part No.47C04-I/SN
BrandMicrochip
MYR2.652
Each (In a Tube of 100)
units
4kbit 512K x 8 - 8bit - - 1000kHz Yes Synchronous Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 1.25mm
RS Stock No. 126-6981
Mfr. Part No.RMLV0816BGBG-4S2#AC0
MYR122.48
Each
units
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
RS Stock No. 171-0980
Mfr. Part No.CY62167DV30LL-55ZXI
MYR62.86
Each (In a Tray of 192)
units
16Mbit 1M x 16 bit 1M 16bit 55ns 16bit - Yes - Surface Mount TSOP 48 18.4 x 12 x 1.05mm 1.05mm
New
RS Stock No. 193-8458
Mfr. Part No.CY62256NLL-55ZXIT
MYR5.701
Each (On a Reel of 1500)
units
256kbit 32 k x 8 bit 32 k 8bit 55ns 8bit 1MHz Yes Asynchronous Surface Mount TSOP I 28 11.9 x 8.1 x 1mm 1mm
RS Stock No. 923-7598
Mfr. Part No.DS1225AD-200+
MYR67.12
Each (In a Tube of 12)
units
64kbit 8K x 8 bit 8K 8bit 200ns 13bit - Yes Asynchronous Through Hole EDIP 28 39.37 x 18.8 x 9.35mm 9.35mm
RS Stock No. 181-7603
Mfr. Part No.CY62256VNLL-70ZXI
MYR8.18
Each (In a Pack of 5)
units
256kbit 32K x 8 bit 32K 8bit 70ns - - Yes - Surface Mount TSOP 28 11.9 x 8.1 x 1.02mm 1.02mm
RS Stock No. 171-0975
Mfr. Part No.CY62148EV30LL-45BVXI
MYR19.39
Each (In a Tray of 480)
units
4Mbit 512K x 8 bit 512K 8bit 45ns 8bit - Yes - Surface Mount VFBGA 36 6 x 8 x 0.84mm 0.84mm
New
RS Stock No. 189-9175
Mfr. Part No.DS1245Y-100+
MYR170.70
Each
units
1Mbit 128K x 8 bit 128K 8bit 100ns 17bit - Yes Asynchronous Through Hole EDIP 32 44.2 x 18.8 x 9.9mm 9.9mm
RS Stock No. 125-6972
Mfr. Part No.CY62128ELL-45ZXI
MYR10.76
Each (In a Pack of 5)
units
1Mbit 128K x 16 bit 128K 16bit 45ns 6bit - Yes - Surface Mount TSOP 32 20.751 x 11.43 x 2.895mm 2.895mm
RS Stock No. 811-5185
Mfr. Part No.IS61WV25616EDBLL-10TLI
BrandISSI
MYR23.11
Each (In a Pack of 2)
units
4Mbit 256k x 16 256k 16bit 10ns 18bit - Yes Asynchronous Surface Mount TSOP 44 18.54 x 10.29 x 1.05mm 1.05mm
RS Stock No. 181-7597
Mfr. Part No.CY62148EV30LL-45ZSXI
MYR18.24
Each (In a Pack of 2)
units
4Mbit 512K x 8 bit 512K 8bit 45ns 8bit - Yes - Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm
RS Stock No. 171-0983
Mfr. Part No.CY62167EV30LL-45ZXI
MYR57.63
Each (In a Tray of 192)
units
16Mbit 1M x 16 bit 1M 16bit 45ns 16bit - Yes - Surface Mount TSOP 48 18.4 x 12 x 1.05mm 1.05mm
New
RS Stock No. 193-8454
Mfr. Part No.CY62146ELL-45ZSXI
MYR70.121
Each (In a Tray of 135)
units
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 Stock No. 126-7010
Mfr. Part No.RMLV1616AGBG-5S2#AC0
MYR190.69
Each
units
16Mbit 1M words x 16 bit, 2M words x 8 bit 1M, 2M 8 bit, 16 bit 55ns 19 bit, 20 bit - Yes - Surface Mount FBGA 48 7.58 x 8.58 x 0.8mm 0.8mm
RS Stock No. 170-0744
Mfr. Part No.AS7C4096A-12JIN
MYR20.33
Each (In a Tube of 19)
units
4Mbit 512K words x 8 bit 512K 8bit 12ns 19bit - Yes Asynchronous Surface Mount SOJ 36 23.62 x 10.16 x 2.95mm 2.95mm
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