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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รายละเอียดสินค้า / Description ราคา / 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. 125-7541
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY7C199CNL-15VXI
THB85.52
Each: (In a Pack of 5)
Units
256kbit 32K x 8 bit 32K 8bit 15ns 8bit - Yes - Surface Mount SOJ 28 18.03 x 7.62 x 0.254mm 0.254mm
RS Stock No. 125-7542
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY7C199D-10VXI
THB66.78
Each: (In a Pack of 5)
Units
256kbit 32K x 8 bit 32K 8bit 15ns 8bit - Yes - Surface Mount SOJ 28 18.03 x 7.62 x 0.254mm 0.254mm
RS Stock No. 171-0974
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY62148ESL-55ZAXI
THB176.17
Each (In a Tray of 234)
Units
4Mbit 512K x 8 bit 512K 8bit 55ns 8bit - Yes - Surface Mount STSOP 32 11.9 x 8.1 x 1.05mm 1.05mm
RS Stock No. 181-7603
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY62256VNLL-70ZXI
THB70.20
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. 125-6969
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY62126EV30LL-45ZSXI
THB80.14
Each: (In a Pack of 5)
Units
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 Stock No. 182-3296
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY7C1049GN30-10VXI
THB185.105
Each (In a Tube of 19)
Units
4Mbit 512K x 16 bit 512K 8bit 10ns - 100MHz - Asynchronous Surface Mount SOJ 36 0.93 x 0.4 x 0.12mm 0.12mm
RS Stock No. 181-7449
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY7C1049G-10VXI
THB248.263
Each (In a Tube of 19)
Units
4Mbit 512K x 8 bit 512K 8bit 10ns - - - Asynchronous Surface Mount SOJ 36 0.93 x 0.405 x 0.12in 3.05mm
RS Stock No. 171-0987
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY7C1019D-10ZSXI
THB119.634
Each (In a Tray of 468)
Units
1Mbit 128K x 8 bit 128K 8bit 10ns 8bit - Yes - Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm
RS Stock No. 124-2941
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY62148ELL-55SXI
THB155.50
Each: (In a Pack of 2)
Units
4Mbit 512K x 8 bit 512K 8bit 45ns 8bit 1MHz Yes - Surface Mount SOIC 32 20.75 x 11.43 x 2.81mm 2.81mm
ใหม่ / New
RS Stock No. 188-5323
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY62148ELL-45ZSXI
THB185.39
Each (In a Tray of 117)
Units
4Mbit 512k x 8 bit 512k 8bit 45ns - 1MHz Yes - Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm
RS Stock No. 171-0964
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY14B256LA-SZ45XI
THB467.14
Each (In a Tube of 44)
Units
256kbit 32K x 8 bit 32K 8bit 45ns 8bit - - - Surface Mount SOIC 32 20.878 x 7.594 x 2.286mm 2.286mm
RS Stock No. 125-6972
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY62128ELL-45ZXI
THB83.63
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. 171-0972
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY62138EV30LL-45BVXI
THB109.423
Each (In a Tray of 480)
Units
2Mbit 256K x 8 bit 256K 8bit 45ns 8bit - Yes - Surface Mount VFBGA 36 6 x 8 x 0.81mm 0.81mm
RS Stock No. 181-8374
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.S34ML01G200BHI000
THB165.50
Each: (In a Pack of 2)
Units
1Gbit 2048K x 64 bit 2048K 64bit - 8bit - - Asynchronous Surface Mount BGA 63 11 x 9 x 1mm 1mm
RS Stock No. 827-2571
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY7C1019D-10ZSXI
THB158.36
Each: (In a Pack of 5)
Units
1Mbit 128k x 8 128K 8bit 10ns 17bit 100MHz Yes Asynchronous Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm
RS Stock No. 181-8271
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY14B256LA-SZ25XI
THB722.545
Each (In a Tube of 22)
Units
256kbit 32K x 8 bit 32K 8bit 25ns - - - - Surface Mount SOIC 32 20.87 x 7.59 x 2.29mm 2.29mm
RS Stock No. 181-7573
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY62128EV30LL-45ZXI
THB95.75
Each: (In a Pack of 4)
Units
1Mbit 128K x 8 bit 128K 8bit 45ns 8bit - Yes - Surface Mount TSOP 32 18.3 x 8.2 x 1.05mm 1.05mm
RS Stock No. 125-6977
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY62137FV30LL-45ZSXI
THB212.42
Each
Units
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 Stock No. 125-7515
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY62167DV30LL-70BVI
THB360.29
Each
Units
16Mbit 1M x 16 bit 1M 16bit 70ns 16bit - Yes - Surface Mount VFBGA 48 8 x 9.5 x 0.81mm 0.81mm
RS Stock No. 181-8296
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CY62128ELL-45SXIT
THB126.333
Each: (In a Pack of 3)
Units
1Mbit 128K x 8 bit 128K 8bit 45ns 8bit - Yes Asynchronous Surface Mount SOIC 32 20.75 x 11.43 x 2.81mm 2.81mm