The write cycle time matches the read access at 15 ns, so back-to-back read-write transitions do not introduce dead cycles.
Infineon has placed the CY7C1049G18-15ZSXIT in Last Buy status. This is the final purchase window before the part becomes unavailable from the factory. Any open BOM line using this order code needs a last-time-buy quantity commitment or a validated replacement. No official successor order code is listed on the lifecycle record; the replacement path is a pin-compatible density or voltage variant within the CY7C1049 family.