Dual-port SRAM for shared-memory arbitration
The CY7C0251AV-25AC is a 144Kbit dual-port asynchronous SRAM organized as 8K x 18 — two ports with independent address, data, and control lines let two bus masters read or write the same memory array without external arbitration logic. 25 ns access time means the memory completes a read or write cycle within that window from address valid — the port-to-port arbitration delay (busy flag assertion) adds to this, so the system must budget for both when back-to-back accesses collide. Runs from a single 3V to 3.6V rail, matching 3.3V logic families directly — no external level translator needed for the address or data bus.
No pin-compatible direct replacement from Infineon is documented.
Supplied in a 100-LQFP package (also designated 100-TQFP, 14x14 mm body) — fine-pitch surface-mount, reworkable with a hot-air nozzle sized for the 14 mm square body. Shipped in tray format — not tape-and-reel, so a pick-and-place line feeding from tray magazines or a tube feeder is needed for volume assembly.