Cypress officially lists the CY7C1049D-10VXI as Obsolete. No last-time-buy window remains open from the manufacturer. Sourcing now runs through independent distribution where date-code and quality provenance must be verified against the PCN closure date.
10 ns access time — timing budget fit
The 10 ns access time and 10 ns write-cycle time suit zero-wait-state interfaces on legacy DSPs or CPLD-based memory controllers.
5V supply — not 3.3V compatible
The part does not support a 3.3 V rail. A true 3.3 V asynchronous SRAM in the same density and speed class would be a different Cypress family (e.g., CY7C1041).
Industrial temperature grade
The 36-pin SOJ package (10.16 mm wide) is a JEDEC-standard footprint; verify the land pattern against your existing layout.
Surface-mount SOJ-36 — rework and handling
The package is surface-mount with J-bend leads.