The Infineon CY7C1021CV33-10ZSXA is a 1 Mbit asynchronous SRAM organized as 64K words by 16 bits.
10 ns access time — bus timing margin
In a system with a 50 MHz bus (20 ns cycle), this part leaves a 10 ns window for address setup, hold, and board-level propagation — workable but tight. If the bus runs at 66 MHz (15 ns cycle), you are down to 5 ns margin, which demands careful PCB trace length matching and may need a faster SRAM.
Infineon lists the CY7C1021CV33-10ZSXA with a Last Buy lifecycle status. That means the manufacturer has announced a final ordering window — once that closes, the part will no longer be produced. For a production BOM, this triggers a last-time buy decision or a qualification of a replacement. If you have an active design using this SRAM, now is the time to secure lifetime buy quantities or identify a pin-compatible alternative.
Package and footprint — 44-TSOP II
The 44-TSOP II package (0.400-inch body width, 10.16 mm) is a standard SRAM footprint used across multiple vendors. The 44-TSOP II is the same footprint used by many 1 Mbit and 4 Mbit asynchronous SRAMs, which simplifies a potential swap.