The Infineon CY7C056V-12AXC is a 576Kbit dual-port asynchronous SRAM organized as 16K words by 36 bits. It gives two independent systems simultaneous access to the same memory array through separate address, data, and control buses, with on-chip arbitration logic to resolve simultaneous writes to the same address. The 12 ns access time sets the bus turnaround margin for the port that wins arbitration.
12 ns access time — arbitration timing budget
In a dual-port system, that number determines how much slack you have between the two clock domains when the arbiter grants a port. If the other port runs at a faster clock, the 12 ns window becomes the bottleneck for back-to-back reads.
16K x 36 organization — wider than standard
The 36-bit word width is wider than the typical x8 or x16 SRAM. That suits DSP pipelines, FIFO buffers, or packet-header lookup tables where you want a full 36-bit word (or two 18-bit half-words) per address without external muxing. The 576Kbit total capacity is modest by today's standards — this part is about the bus width and the dual-port arbitration, not the density.
144-LQFP — footprint and reflow considerations
The 144-LQFP (20x20 mm body) is a fine-pitch QFP. The 0.5 mm lead pitch means the stencil aperture and solder-paste volume need to be dialled in for consistent wetting. The TQFP variant shares the same footprint.
Not suitable for outdoor, automotive, or industrial floor applications where ambient temperature exceeds 70°C or dips below freezing.
Sourcing is through independent distribution — surplus stock, new-old-stock, or broker inventory. Expect no factory lead time; the channel is whatever stock remains in the field.