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Synchronous SRAM | Cypress Semiconductor

Synchronous SRAM

Cypress is the Synchronous (Sync) SRAM market leader with more than 2.7 billion cumulative units shipped, with lead times of six weeks or less, 99% or higher on-time delivery and legacy product support for up to 20 years. Cypress is the preferred SRAM supplier to customers in several market segments such as networking, automotive, consumer electronics, industrial, medical, aerospace and defense.

Cypress has the industry’s broadest Sync SRAM portfolio with more than 2,300 different products. Rated #1 for performance and reliability, these products have industry leading Random Transaction Rate (RTR up to 2132 MT/s), FIT rates (less than 0.01-FIT/Mb) and innovative new features such as on-chip Error Correction Code (ECC). Cypress Sync SRAM products are suitable for systems running mission critical applications such as switches and routers, RADAR and signal processing, test equipment, automotive and military.

Random Transaction Rate (RTR)

Random Transaction Rate (RTR) is the number of fully random read or write transactions a memory can perform every second. It is measured in MT/s, or mega transactions per second. RTR is a critical metric in high performance applications, such as networking, where memory access is unpredictable.

The QDR Advantage

The QDR SRAM architecture provides the random memory access capabilities needed for networking and other high performance applications. In these applications, memory is a major bottleneck to reaching higher system performance. For example, in networking applications, each data packet requires several random memory transactions. Therefore, the packet processing rate of the system is dependent on how quickly the system can access memory. Cypress's QDR SRAM provides the RTR necessary to break system bottlenecks.

Other memory technologies are optimized for high density. Although these memories perform well for compute applications as the main memory, they do not meet the needs of high performance applications that demand high RTR.

QDR SRAM, on the other hand, is designed specifically for maximum RTR. QDR SRAM allows access to any two memory locations on every clock cycle, and performance never depends on which memory location was accessed in the previous clock cycle. With QDR SRAM, RTR is guaranteed.

Cypress's QDR-IV SRAM provides RTR up to 2132 MT/s. This level of performance is critical to enable the next generation of high performance systems.


Cypress QDR SRAM provides fully random memory access

Cypress is the Synchronous (Sync) SRAM market leader with more than 2.7 billion cumulative units shipped, with lead times of six weeks or less, 99% or higher on-time delivery and legacy product support for up to 20 years. Cypress is the preferred SRAM supplier to customers in several market segments such as networking, automotive, consumer electronics, industrial, medical, aerospace and defense.

Cypress has the industry’s broadest Sync SRAM portfolio with more than 2,300 different products. Rated #1 for performance and reliability, these products have industry leading Random Transaction Rate (RTR up to 2132 MT/s), FIT rates (less than 0.01-FIT/Mb) and innovative new features such as on-chip Error Correction Code (ECC). Cypress Sync SRAM products are suitable for systems running mission critical applications such as switches and routers, RADAR and signal processing, test equipment, automotive and military.

Features Standard Sync NoBL QDR-II QDR- II+ QDR II+ Xtreme QDR-IV
Product Selector Guide
Maximum Random Transaction Rate 250 MT/s 250 MT/s 666 MT/s 666 MT/s 900 MT/s 2132 MT/s
Maximum Bandwidth 18 Gbps 18 Gbps 47.9 Gbps 79.2 Gbps 91.1 Gbps 153.3 Gbps
Density 2-72 Mb 4-72 Mb 18-144Mb 18-144Mb 36-72Mb 72-144Mb
On-Chip Error Correction Code (ECC) Yes Yes No No No Yes
Core Voltage 2.5V, 3.3V 2.5V, 3.3V 1.8V 1.8V 1.8V 1.3V
I/O Voltage Standard LVTTL33, LVTTL25 HSTL15, HSTL18 HSTL15 HSTL/SSTL12, POD12
Burst Length 4 4 2,4 2,4 2,4 2
On Die Termination No No No Yes Yes Yes
Data Width X18,X32 X36, X72 X18, X36, X72 X8 X9,X18, X36 X9,X18, X36 X18, X36 X18, X36
Read Latency 1,2 cycles 1,2 cycles 1.5 cycles 2.0, 2.5 cycles 2.5 cycles 5, 8 cycles
Temperature Grade Industrial,
Commercial
Industrial,
Commercial
Industrial,
Commercial
Industrial,
Commercial
Industrial,
Commercial
Industrial,
Commercial
Document Type Standard Sync NoBL QDR-II QDR-II+ QDR-II+ Xtreme QDR-IV
Product Roadmaps 1 1 1 1 1 1
Advanced Product Change Notice (APCN)            
Application Notes 2 3 5 7   1
Datasheets 14 13 9 25 8 4
Errata   1        
Knowledge Base Articles 2 2 1 1 1 1
Models 36 26 94 77 3 18
Other Resources     2 2   1
Product Brochures            
Product Change Notice (PCN)            
Product Information Notice (PIN)            
Product Overviews       1   2
Qualification Reports 3 4 3 3   1
Technical Articles           1
White Papers           1
High-Speed Networking
    Military and Aerospace
      High Performance Computing
        Imaging and Video