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庫存編號 188-5319
製造零件編號CY62128EV30LL-45SXI
HK$25.76
毎管:25 個
單位
1Mbit 128k x 8 bit 128k 8bit 45ns - 1MHz Yes - Surface Mount SOIC 32 20.75 x 11.43 x 2.88mm 2.88mm
RS庫存編號 170-0921
製造零件編號AS7C316098A-10BIN
HK$237.001
Each (In a Tray of 480)
單位
16Mbit 1024K x 16 bit 1024K 16bit 10ns 16bit 1MHz Yes Asynchronous Surface Mount TFBGA 48 6.05 x 8.05 x 1.05mm 1.05mm
RS庫存編號 666-8138
製造零件編號23A256-I/SN
BrandMicrochip
HK$9.29
/個 (每包:5個)
單位
256kbit 32768 words x 8 bit 32K 8bit 32ns 16bit 16MHz Yes Synchronous Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 1.25mm
RS庫存編號 901-5802
製造零件編號R1LP0108ESN-5SI#B0
HK$32.44
個 (以毎袋:2)
單位
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庫存編號 124-2949
製造零件編號CY7C1021D-10ZSXI
HK$26.01
/個 (每包:2個)
單位
1Mbit 64K x 16 bit 64K 16bit 10ns 16bit 100MHz Yes Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
RS庫存編號 126-7312
製造零件編號RMLV1616AGSD-5S2#AC0
HK$394.30
單位
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 TSOP 52 10.89 x 8.99 x 1mm 1mm
RS庫存編號 171-0970
製造零件編號CY62137FV30LL-45BVXI
HK$22.59
Each (In a Tray of 480)
單位
2Mbit 128K x 16 bit 128K 16bit 45ns 16bit - Yes - Surface Mount VFBGA 48 6 x 8 x 0.81mm 0.81mm
RS庫存編號 170-0891
製造零件編號AS6C1008-55PCN
HK$21.883
毎管:13 個
單位
1Mbit 128K x 8 bit 128K 8bit 55ns 17bit - Yes Asynchronous Through Hole PDIP 32 41.91 x 13.818 x 3.81mm 3.81mm
RS庫存編號 181-8359
製造零件編號CY7C1069G30-10ZSXI-CYP
HK$404.83
單位
16Mbit 2M x 8 bit 2M 8bit 10ns - 100MHz - Asynchronous Surface Mount TSOP 54 22.51 x 10.26 x 1.05mm 1.05mm
RS庫存編號 125-6977
製造零件編號CY62137FV30LL-45ZSXI
HK$57.16
單位
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庫存編號 391-624
製造零件編號IS62WV25616BLL-55TLI
BrandISSI
HK$42.84
單位
4Mbit 256K words x 16 bit 256K 16bit 55ns 18bit - Yes Asynchronous Surface Mount TSOP 44 18.52 x 10.29 x 1.05mm 1.05mm
RS庫存編號 797-5888
製造零件編號AS7C38098A-10BIN
HK$123.52
單位
8Mbit 512K x 16 bit 512K 16bit 10ns 16bit 1MHz Yes Asynchronous Surface Mount TFBGA 48 6.05 x 8.05 x 1.05mm 1.05mm
RS庫存編號 170-0753
製造零件編號AS7C256A-12JIN
HK$17.03
毎管:25 個
單位
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庫存編號 797-5869
製造零件編號AS7C316096A-10TIN
HK$194.80
單位
16Mbit 2048K x 8 bit 2048K 8bit 10ns 8bit 1MHz Yes Asynchronous Surface Mount TSOP 48 18.5 x 12.1 x 1.05mm 1.05mm
RS庫存編號 171-0982
製造零件編號CY62167EV30LL-45ZXA
HK$112.87
Each (In a Tray of 96)
單位
16Mbit 1M x 16 bit 1M 16bit 45ns 16bit - Yes - Surface Mount TSOP 48 18.4 x 12 x 1.05mm 1.05mm
RS庫存編號 125-6969
製造零件編號CY62126EV30LL-45ZSXI
HK$21.56
/個 (每包:5個)
單位
1Mbit 64K x 16 bit 64K 16bit 45ns 16bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
RS庫存編號 901-5749
製造零件編號R1RP0416DGE-2PR#B0
HK$136.53
單位
4Mbit 256K x 16 bit 256K 16bit 12ns 16bit 1MHz - - Surface Mount SOJ 44 28.7 x 10.29 x 2.75mm 2.75mm
RS庫存編號 181-7613
製造零件編號CY7C1061GE30-10ZSXI
HK$311.41
單位
16Mbit 1M x 16 bit 1M 16bit 10ns - - - Asynchronous Surface Mount TSOP 54 22.51 x 10.26 x 1.05mm 1.05mm
RS庫存編號 177-5533
製造零件編號AS6C1008-55TIN
HK$15.347
Each (In a Tray of 156)
單位
1Mbit 128K words x 8 bit 128K 8bit 55ns 17bit - Yes Asynchronous Surface Mount TSOP 32 8 x 18.4 x 1mm 1mm
RS庫存編號 170-0737
製造零件編號AS6C8008-55ZIN
HK$47.52
Each (In a Tray of 135)
單位
8Mbit 1024K words x 8 bit 1M 8bit 55ns 20bit - Yes Asynchronous Surface Mount TSOP 44 18.42 x 10.16 x 1mm 1mm