Dual-port SRAM for shared-memory arbitration
The Cypress CY7C0852V-133AXCT is a 4.5 Mbit synchronous dual-port SRAM organized as 128K x 36 bits, clocked at 133 MHz with a 4.4 ns access time. It operates from a 3.135 V to 3.465 V supply and is rated for 0°C to 70°C commercial environments. The 176-LQFP package suits surface-mount assembly for networking equipment, telecom line cards, and DSP co-processor buffers where two bus masters need collision-free shared memory access.
133 MHz clock — what it buys the bus
The 133 MHz clock rate and 4.4 ns access time let both ports sustain back-to-back reads or writes without wait states, provided the arbiter logic respects the semaphore flags. For a packet buffer or a dual-ported register file, this means the CPU and the DMA engine can each hit the memory at full speed without stalling the other side.