The Cypress CY7C027VN-15AXC is a 512Kbit dual-port asynchronous SRAM organized as 32K words by 16 bits. It gives two independent ports simultaneous read/write access to the same memory array, which is the classic solution for shared-memory arbitration between two processors, a processor and an FPGA, or a DSP and a DMA controller. The 15 ns access time keeps bus turnaround tight enough for mid-speed systems running at up to roughly 33 MHz without wait states. The 100-TQFP (14x14 mm) package is a common fine-pitch footprint, but note the 0.5 mm pitch — board houses need a decent stencil alignment for reliable solder joints.
In practice, board trace delays and capacitive loading on the 16-bit data bus will eat into that margin, so budget for 10–15% derating. For systems that need faster arbitration — say a 100 MHz bus — you would step up to a 10 ns or 8 ns dual-port SRAM, but those are harder to find and typically come in larger packages.
We source these from verified surplus and new-old-stock inventory, and each quote is confirmed against current availability at the time of the RFQ.
That covers office equipment, telecom indoor racks, test instrumentation, and consumer electronics. Not suitable for engine bays, outdoor base stations, or military depots without active thermal management. If your system sees -40°C or +85°C, you need the industrial-temperature variant (CY7C027V-15AXI or similar), which is also obsolete and harder to source.