The CY7C036A-15AC is a 288 Kbit (organized as 16K x 18) dual-port asynchronous SRAM from Infineon. It gives two independent ports simultaneous read/write access to the same memory array — useful in multiprocessor systems, FIFO buffers, or shared-memory designs where one side writes data while the other reads it without arbitration overhead.
For a system running a 33 MHz bus (30 ns cycle), 15 ns leaves enough margin for address decode, buffer delays, and setup/hold at the memory interface. If your design runs faster — say 50 MHz or above — you will need a faster dual-port SRAM (10 ns or 8 ns parts exist in the same family). The asynchronous interface means no clock to manage: just assert chip select and address, and data appears after the access time. No PLL, no clock skew worries.
Infineon lists the CY7C036A-15AC as obsolete. That means it is no longer manufactured, and no last-time-buy window is open. There is no official replacement from Infineon for this exact dual-port SRAM, so a pin-compatible swap would require checking the CY7C036 family data sheet for any still-active variants (if any) or moving to a newer dual-port SRAM family with a different footprint.
Package and temperature grade — the physical fit
The part comes in a 100-pin TQFP (14x14 mm body, 0.5 mm pitch) — a common footprint for late-90s through 2000s-era ASIC and DSP designs. If your board runs hot or lives in an unventilated enclosure, this part will not hold up.