Dual-port SRAM with 15 ns access — the bus-margin decision
The CY7C0241-15AXC is a 72Kbit dual-port asynchronous SRAM organized as 4K words of 18 bits each. The 18-bit word width lets a 16-bit data bus carry two extra bits for parity, control tags, or sideband flags without a second memory chip — a common trick in shared-memory FIFO and mailbox designs. The 15 ns access time is the ceiling for the bus-turnaround handshake between two independent ports. Each port has its own address, data, and control lines with no clock required — arbitration happens through the BUSY flag logic. At 15 ns, the port-to-port data transfer completes within a single 66 MHz clock cycle, but the address setup and hold windows must be respected on both sides.
5V supply rail — not a drop-in for 3.3V-only systems
Supply range is 4.5V to 5.5V, so this part runs on a legacy 5V rail. A 3.3V-only backplane needs a level translator on the address/data bus — the I/O thresholds are TTL-compatible but the core supply is not. The 100-TQFP (14x14 mm) footprint is standard for this density class; 0.5 mm pitch demands a controlled-impedance PCB stack for the parallel bus. Temperature grade is commercial: 0°C to 70°C. No industrial or automotive rating — the part is suited for indoor equipment, telecom line cards, or test gear that stays above freezing.
Obsolete — no official replacement on record
Infineon lists this part as Obsolete. No official successor part number is published. For a BOM that already qualifies the CY7C0241 footprint, the only channel is independent surplus or broker inventory — quantities are lot-specific and confirmed at RFQ. A redesign to a current dual-port SRAM family (same package, different supply or speed grade) is the long-term fix. The tray package is the standard shipping format for this 100-TQFP part.