15 ns access — what it buys the shared bus
The CY7C028V-15AXIT is a 1 Mbit dual-port asynchronous SRAM from Cypress, organized as 64K x 16, with a 15 ns access time. The dual-port architecture gives two independent ports with separate address, data, and control lines, so two bus masters can read or write the same memory array without external arbitration logic — useful for shared buffers, mailbox registers, or video line stores where one port is the writer and the other the reader.
Industrial temperature and supply — the operating envelope
The supply range of 3V to 3.6V lets it run from a 3.3V rail with margin for ripple and load transients. The 15 ns write cycle time (word and page modes) matches the read access, so back-to-back operations at the same port don't create a throughput bottleneck.
The only supply channel is independent distribution — surplus stock, new-old-stock, or pulled inventory. If this is a production BOM line, the buyer needs to qualify the part against an RFQ for whatever stock remains in the channel, and start planning a pin-compatible or functionally equivalent migration.
100-TQFP — footprint and rework realities
The 100-TQFP (14x14 mm) package is a 0.5 mm pitch fine-pitch surface-mount part. The exposed pad is not present on this package variant, so all thermal dissipation goes through the leads. The footprint is standard for 100-pin TQFP, but any replacement candidate must match the same pad layout to avoid a board respin.