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 125-7535
製造零件編號CY7C1051DV33-10ZSXI
HK$122.19
單位
8Mbit 512K x 16 bit 512K 16bit 10ns 16bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
RS庫存編號 125-7518
製造零件編號CY62177EV30LL-55ZXI
HK$475.00
單位
32Mbit 2M x 16 bit 2M 16bit 55ns 16bit - Yes - Surface Mount TSOP 48 18.4 x 12 x 1.05mm 1.05mm
RS庫存編號 171-0984
製造零件編號CY62177EV30LL-55ZXI
HK$412.36
Each (In a Tray of 96)
單位
32Mbit 2M x 16 bit 2M 16bit 55ns 16bit - Yes - Surface Mount TSOP 48 18.4 x 12 x 1.05mm 1.05mm
RS庫存編號 124-2944
製造零件編號CY62157EV30LL-45ZXI
HK$102.29
單位
8Mbit 512K x 16 bit 512K 16bit 45ns 16bit 1MHz Yes - Surface Mount TSOP 48 18.4 x 12 x 1.05mm 1.05mm
RS庫存編號 188-5332
製造零件編號CY7C1009D-10VXI
HK$23.62
毎管:23 個
單位
1Mbit 128k x 8 bit 128k 8bit 10ns - 100MHz - Asynchronous Surface Mount SOJ 32 0.83 x 0.305 x 0.11in 2.79mm
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 181-7445
製造零件編號CY7C1021DV33-10ZSXIT
HK$14.04
個 (在毎卷:1000)
單位
1Mbit 64K x 16 bit 64K 16bit 10ns - - - Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
RS庫存編號 188-5333
製造零件編號CY7C1019DV33-10VXI
HK$32.35
毎管:23 個
單位
1Mbit 128k x 8 bit 128k 8bit 10ns 8bit 100MHz - Asynchronous Surface Mount SOJ 32 0.83 x 0.405 x 0.11mm 0.11mm
RS庫存編號 188-5329
製造零件編號CY62158EV30LL-45ZSXI
HK$64.702
Each (In a Tray of 135)
單位
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庫存編號 171-0963
製造零件編號CY14B108N-ZSP45XI
HK$328.451
Each (In a Tray of 108)
單位
8Mbit 512K x 16 bit 512K 16bit 45ns 16bit - Yes Asynchronous Surface Mount TSOP 54 22.517 x 10.262 x 1.05mm 1.05mm
RS庫存編號 181-7446
製造零件編號CY7C1041G-10ZSXI
HK$47.677
Each (In a Tray of 135)
單位
4Mbit 256K x 16 bit 256K 16bit 10ns - - - Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
RS庫存編號 188-5330
製造零件編號CY62167EV30LL-45BVXI
HK$67.66
Each (In a Tray of 480)
單位
16Mbit 2M x 8 bit 2M 8bit 45ns 16bit 1MHz Yes - Surface Mount VFBGA 48 8 x 6 x 0.55mm 0.55mm
RS庫存編號 124-2945
製造零件編號CY62158ELL-45ZSXI
HK$99.26
單位
8Mbit 1M x 8 bit 1M 8bit 45ns 8bit 1MHz Yes - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
RS庫存編號 188-5303
製造零件編號CY14E256LA-SZ45XI
HK$142.22
毎管:22 個
單位
256kbit 32k x 8 bit 32k 8bit 45ns 8bit 1MHz Yes - Surface Mount SOIC 32 20.87 x 7.59 x 2.29mm 2.29mm
RS庫存編號 171-0964
製造零件編號CY14B256LA-SZ45XI
HK$125.70
毎管:44 個
單位
256kbit 32K x 8 bit 32K 8bit 45ns 8bit - - - Surface Mount SOIC 32 20.878 x 7.594 x 2.286mm 2.286mm
RS庫存編號 171-0977
製造零件編號CY62157EV30LL-45ZSXI
HK$56.65
Each (In a Tray of 270)
單位
8Mbit 512K x 16 bit 512K 16bit 45ns 16bit - Yes - Surface Mount TSOP 44 18.517 x 10.262 x 1.044mm 1.044mm
RS庫存編號 181-1578
製造零件編號CY7C1041GN30-10ZSXI
HK$39.02
/個 (每包:2個)
單位
4Mbit 256 kB x 16 256k 8bit 10ns 16bit 100MHz - Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
RS庫存編號 188-5334
製造零件編號CY7C1021D-10ZSXI
HK$21.646
Each (In a Tray of 135)
單位
1Mbit 128k x 8 bit 128k 8bit 10ns 16bit 100MHz - Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm
RS庫存編號 182-3290
製造零件編號CY7C1041G-10VXI
HK$54.485
毎管:17 個
單位
4Mbit 256K x 16 bit 256K 16bit 10ns - 100MHz - Asynchronous Surface Mount SOJ 44 1.13 x 0.405 x 0.11in 2.79mm
RS庫存編號 171-0974
製造零件編號CY62148ESL-55ZAXI
HK$47.41
Each (In a Tray of 234)
單位
4Mbit 512K x 8 bit 512K 8bit 55ns 8bit - Yes - Surface Mount STSOP 32 11.9 x 8.1 x 1.05mm 1.05mm