Packaged in a 44-SOJ surface-mount body, it was designed for cache memory, buffer storage, and general-purpose data memory in embedded systems, telecom equipment, and industrial controllers that need fast, simple random access without refresh overhead.
That gives a memory controller or CPU enough margin to run at clock rates up to roughly 33 MHz without wait states, assuming reasonable board trace lengths. For a 16-bit data bus application like a DSP scratchpad or a network processor packet buffer, this part keeps the timing closure simple. The write cycle time matches the read at 15 ns, so back-to-back operations are symmetric.
Infineon lists the CY7C1021CV33-15VC as obsolete. No last-time-buy window remains open; the part is no longer manufactured. For BOM lines that need this exact order code, supply is limited to existing stock held by independent distributors and surplus channels. There is no official successor part from Infineon for this specific speed and package variant. If you are qualifying a replacement, look for a pin-compatible 64K x 16 async SRAM in a 44-SOJ footprint with a 3.3V supply and 15 ns or faster access time — several vendors offer such parts, but verify the pinout and timing against your board.
Package and temperature grade — board-level fit
The 44-SOJ (Small Outline J-lead) package has a 0.400-inch body width and 10.16 mm width, with J-bend leads for surface mounting. It is a common footprint for mid-density SRAMs from the late 1990s through 2010s. The 3.3V supply rail is standard for late-generation 3.3V logic families, but note that the I/O is not 5V-tolerant.