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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Part Details Brand 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, CY62148ELL-55SXIT- 4Mbit
  • € 6.58
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Cypress Semiconductor 4Mbit - 512K x 8 bit 512K 8bit 45ns 8bit - - Surface Mount SOIC 32 20.75 x 11.43 x 2.81mm 2.81mm 20.75mm 11.43mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C1021DV33-10ZSXIT- 1Mbit
  • € 3.30
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Cypress Semiconductor 1Mbit - 64K x 16 bit 64K 16bit 10ns - - Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.04mm 1.04mm 18.51mm 10.26mm 3 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62128ELL-45SXIT- 1Mbit
  • € 3.81
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Cypress Semiconductor 1Mbit - 128K x 8 bit 128K 8bit 45ns 8bit - Asynchronous Surface Mount SOIC 32 20.75 x 11.43 x 2.81mm 2.81mm 20.75mm 11.43mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62128EV30LL-45ZXI- 1Mbit
  • € 2.68
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Cypress Semiconductor 1Mbit - 128K x 8 bit 128K 8bit 45ns 8bit - - Surface Mount TSOP 32 18.3 x 8.2 x 1.05mm 1.05mm 18.3mm 8.2mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C109D-10VXIT- 1Mbit Cypress Semiconductor 1Mbit - 128K x 8 bit 128K 8bit 10ns - 100MHz Asynchronous Surface Mount SOJ 32 0.83 x 0.305 x 0.11mm 0.11mm 0.83mm 0.31mm - 5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62256VNLL-70ZXI- 256kbit
  • € 1.96
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Cypress Semiconductor 256kbit - 32K x 8 bit 32K 8bit 70ns - - - Surface Mount TSOP 28 11.9 x 8.1 x 1.02mm 1.02mm 11.9mm 8.1mm 2.7 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C1041GN-10ZSXI- 4Mbit
  • € 6.61
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Cypress Semiconductor 4Mbit - 256K x 16 bit 256K 16bit 10ns - - Asynchronous 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, CY7C1021DV33-10BVXI- 1Mbit
  • € 2.95
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Cypress Semiconductor 1Mbit - 64K x 16 bit 64K 16bit 10ns - 100MHz Asynchronous Surface Mount BGA 48 8 x 6 x 0.79mm 0.79mm 8mm 6mm 3 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C1041GN30-10BVXI- 4Mbit
  • € 6.58
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Cypress Semiconductor 4Mbit - 256K x 16 bit 256K 16bit 10ns - 100MHz Asynchronous Surface Mount BGA 48 8 x 6 x 0.79mm 0.79mm 8mm 6mm 2.2 V 3.6 V +85 °C -40 °C
Microchip Technology SRAM, 23K640-I/ST- 64kbit Microchip Technology 64kbit - 8192 words x 8 bit 8192 8bit - 16bit 20MHz Synchronous Surface Mount TSSOP 8 4.5 x 3.1 x 1.05mm 1.05mm 3.1mm 4.5mm 2.7 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62147EV30LL-45ZSXI- 4Mbit
  • € 4.76
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Cypress Semiconductor 4Mbit - 256K x 16 bit 256K 16bit 45ns 16bit - - 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, S34ML01G200BHI000- 1Gbit
  • € 5.75
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Cypress Semiconductor 1Gbit - 2048K x 64 bit 2048k 64bit - 8bit - Asynchronous Surface Mount BGA 63 11 x 9 x 1mm 1mm 11mm 9mm 2.7 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY62148EV30LL-45ZSXI- 4Mbit
  • € 5.24
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Cypress Semiconductor 4Mbit - 512K x 8 bit 512K 8bit 45ns 8bit - - Surface Mount TSOP 32 21.08 x 10.29 x 1.05mm 1.05mm 21.08mm 10.29mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C1049GN30-10VXI- 4Mbit Cypress Semiconductor 4Mbit - 512k x 16 bit 512K 8bit 10ns - 100MHz Asynchronous Surface Mount SOJ 36 0.93 x 0.4 x 0.12mm 0.12mm 0.93mm 0.4mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C1049G-10VXI- 4Mbit Cypress Semiconductor 4Mbit - 512K x 8 bit 512K 8bit 10ns - - Asynchronous Surface Mount SOJ 36 0.93 x 0.405 x 0.12in 3.05mm 23.62mm 10.29mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C1041G30-10VXI- 4Mbit Cypress Semiconductor 4Mbit - 256K x 16 bit 256K 16bit 10ns - 100MHz Asynchronous Surface Mount SOJ 44 1.13 x 0.405 x 0.11in 2.79mm 28.7mm 10.29mm 2.2 V 3.6 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C1041G-10VXI- 4Mbit Cypress Semiconductor 4Mbit - 256K x 16 bit 256K 16bit 10ns - 100MHz Asynchronous Surface Mount SOJ 44 1.13 x 0.405 x 0.11in 2.79mm 28.7mm 10.29mm 4.5 V 5.5 V +85 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C1041G30-10ZSXE- 4Mbit
  • € 11.88
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Cypress Semiconductor 4Mbit - 256K x 16 bit 256K 16bit 10ns - 1MHz Asynchronous Surface Mount TSOP 44 18.51 x 10.26 x 1.05mm 1.05mm 18.51mm 10.26mm 2.2 V 3.6 V +125 °C -40 °C
Cypress Semiconductor SRAM Memory Chip, CY7C1041G30-10ZSXI- 4Mbit
  • € 11.31
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Cypress Semiconductor 4Mbit - 256K x 16 bit 256K 16bit 10ns - - Asynchronous 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, CY7C1049GN30-10ZSXI- 4Mbit
  • € 7.06
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Cypress Semiconductor 4Mbit - 512K x 8 bit 512K 8bit 10ns - - Asynchronous 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
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