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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Produkta apraksts Brand Stock Memory Size Type Organisation Number of Words Number of Bits per Word Maximum Random Access Time Address Bus Width Clock Frequency Timing Type Mounting Type Package Type Pin Count Dimensions Height Length Width Minimum Operating Supply Voltage Maximum Operating Supply Voltage Maximum Operating Temperature Minimum Operating Temperature
Cypress Semiconductor SRAM Memory Chip, CY14B101LA-ZS25XI- 1Mbit Cypress Semiconductor 0 1Mbit - 128K x 8 bit 128K 8bit 25ns 8bit 1MHz - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm 18.51mm 10.26mm 2.7 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY14E256LA-SZ45XI- 256kbit Cypress Semiconductor 0 256kbit - 32K x 8 bit 32K 8bit 45ns 8bit 1MHz - Surface Mount SOIC 32 20.87 x 7.59 x 2.29mm 2.29mm 20.87mm 7.59mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62126EV30LL-45ZSXI- 1Mbit Cypress Semiconductor 0 1Mbit - 128K x 8 bit 128K 8bit 45ns 16bit 1MHz - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm 18.51mm 10.26mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62128ELL-45SXI- 1Mbit Cypress Semiconductor 0 1Mbit - 128K x 8 bit 128K 8bit 45ns 8bit 1MHz - Surface Mount SOIC 32 20.75 x 11.43 x 2.88mm 2.88mm 20.75mm 11.43mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62128EV30LL-45SXA- 1Mbit Cypress Semiconductor 0 1Mbit - 128K x 8 bit 128K 8bit 45ns 8bit 1MHz - Surface Mount SOIC 32 20.75 x 11.43 x 2.88mm 2.88mm 20.75mm 11.43mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62128EV30LL-45SXI- 1Mbit Cypress Semiconductor 0 1Mbit - 128K x 8 bit 128K 8bit 45ns - 1MHz - Surface Mount SOIC 32 20.75 x 11.43 x 2.88mm 2.88mm 20.75mm 11.43mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62128EV30LL-45ZAXI- 1Mbit Cypress Semiconductor 0 1Mbit - 128K x 8 bit 128K 8bit 45ns - 1MHz - Surface Mount STSOP 32 11.9 x 8.1 x 1.05mm 1.05mm 11.9mm 8.1mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62136EV30LL-45ZSXI- 2Mbit Cypress Semiconductor 0 2Mbit - 128K x 16 bit 128K 16bit 45ns 16bit 1MHz - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm 18.51mm 10.26mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62146EV30LL-45ZSXI- 4Mbit Cypress Semiconductor 0 4Mbit - 512K x 8 bit 512K 8bit 45ns 16bit 1MHz - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm 18.51mm 10.26mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62148ELL-45ZSXI- 4Mbit Cypress Semiconductor 0 4Mbit - 512K x 8 bit 512K 8bit 45ns - 1MHz - Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm 21.08mm 10.29mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62148ELL-55SXI- 4Mbit Cypress Semiconductor 0 4Mbit - 512K x 8 bit 512K 8bit 55ns - 1MHz - Surface Mount SOIC 32 20.75 x 11.43 x 2.88mm 2.88mm 20.75mm 11.43mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62157ELL-45ZSXI- 8Mbit Cypress Semiconductor 0 8Mbit - 512k x 16 bit 512K 16bit 45ns 16bit 1MHz - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm 18.51mm 10.26mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62157EV30LL-45BVXI- 8Mbit Cypress Semiconductor 0 8Mbit - 512k x 16 bit 512K 16bit 45ns - 1MHz - Surface Mount VFBGA 48 8 x 6 x 0.81mm 0.81mm 8mm 6mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62157EV30LL-45ZXI- 8Mbit Cypress Semiconductor 0 8Mbit - 512k x 16 bit 512K 16bit 45ns - 1MHz - Surface Mount TSOP 48 18.51 x 10.26 x 1.04mm 1.04mm 18.51mm 10.26mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62158ELL-45ZSXI- 8Mbit Cypress Semiconductor 0 8Mbit - 512k x 16 bit 512K 16bit 45ns 8bit 1MHz - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm 18.51mm 10.26mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62158EV30LL-45ZSXI- 8Mbit Cypress Semiconductor 0 8Mbit - 512k x 16 bit 512K 16bit 45ns 8bit 1MHz - Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm 18.51mm 10.26mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62167EV30LL-45BVXI- 16Mbit Cypress Semiconductor 0 16Mbit - 2M x 8 bit 2M 8bit 45ns 16bit 1MHz - Surface Mount VFBGA 48 8 x 6 x 0.55mm 0.55mm 8mm 6mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62256NLL-55ZXI- 256kbit Cypress Semiconductor 0 256kbit - 32K x 8 bit 32K 8bit 55ns - 1MHz - Surface Mount TSOP 28 11.9 x 8.1 x 1.15mm 1.15mm 11.9mm 8.1mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C1009D-10VXI- 1Mbit Cypress Semiconductor 0 1Mbit - 128K x 8 bit 128K 8bit 10ns - 100MHz Asynchronous Surface Mount SOJ 32 0.83 x 0.305 x 0.11in 2.79mm 21.08mm 7.75mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C1019DV33-10VXI- 1Mbit Cypress Semiconductor 0 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 0.83mm 0.41mm 3 V 3.6 V +85 °C -40 °C
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