QDR™
QDR™-IV solution provides fast random memory access
Quadruple data rate (QDR™) SRAM products are geared primarily to the networking and communication market. QDR™ SRAMs have a maximum clock speed of 1066 MHz with a read latency of 1 cycle and are available in an industry-standard 165-ball BGA.
- High-speed QDR™ SRAM at 1066 MHz
- Low read latency
- Read/Write dedicated ports
- On-die termination to reduce noise
- On-chip ECC and address parity
- Per-bit deskew training
High-performance QDR™ SRAMs: ideal for networking applications
QDR™ SRAMs are similar to NoBL SRAMs but with architectural enhancements such as double data rate I/Os and dedicated read/write ports. QDR™ SRAMs are used in networking applications where reads and writes are balanced such as packet buffer, statistics counters, flow state, and scheduling. QDR™ SRAMs operate at a maximum speed of 1066 MHz with a read latency of 1 cycle and are available in an industry standard 165-ball BGA.
Quad data rate (QDR™) sync SRAMs
QDR™-IV SRAM architecture provides true random memory access capabilities needed for networking and other high-performance applications. Other common memory technologies are optimized for long bursts of sequential memory access which is not optimal for networking applications. These memory technologies have performance overhead for operations like refreshing charge and activating rows. This overhead forces system designers to replicate memory banks in order to achieve the necessary RTR performance, but memory replication increases board space, cost, and power consumption. With QDR™-IV, random memory access performance is guaranteed and there are no delays. QDR™-IV SRAM provides read or write access to any memory location on every clock cycle. Performance is constant and does not depend on which memory location was accessed in the previous clock cycle. For networking applications such as statistics and forwarding, these capabilities are critical to achieve high network line rates and ensure consistent performance.
Infineon's QDR™ SRAM for networking applications
Streaming video, cloud services, and mobile data have fueled the continuing growth of global network traffic. To support this growth, the next generation of networking systems must provide faster line rates and process millions of packets every second. Packets arrive in a random order and each packet requires several memory transactions to process. In 100 G and higher networking systems, the high flow of packets demands hundreds of millions of memory transactions per second to look up routes from a forwarding table or to update statistics. As a result, packet rates are directly proportional to the rate of random memory access. Next-generation networking equipment requires memories with very high RTR performance to keep pace with ever-increasing network traffic.
Infineon's QDR™-IV SRAM is designed specifically for high RTR performance and satisfies the demanding network functions of packet buffering,updating statistics, tracking flow states, scheduling packets, and performing table lookups.
