15 ns async SRAM in a 16-bit bus slot
The CY7C1021B-15ZXIT is a 1Mbit asynchronous SRAM from Infineon, organized 64K x 16 — a straight fit for legacy 16-bit data buses where the address and data lines map without byte-lane muxing. The 15 ns access time sets the read-cycle floor: at 5 V nominal, the chip delivers a 66 MHz equivalent random-access rate on paper, but the real ceiling is the bus turn-around and the controller's tRC. In a typical 16-bit DSP or network processor glue, this part keeps the wait-state count at zero down to about 40 ns cycle time before the memory becomes the bottleneck.
Industrial temperature and 5 V supply
The 4.5V–5.5V supply window matches legacy 5 V logic families — no level translation on the address/data bus when paired with a 5 V-tolerant FPGA or ASIC.
Infineon lists the CY7C1021B-15ZXIT as Obsolete. Sourcing is limited to broker-held inventory — date codes vary, and reel quantities may be partial. Every unit is screened for counterfeit risk before commitment.
44-TSOP II footprint and Tape & Reel delivery
Housed in a 44-TSOP II (0.400-inch body width, 10.16 mm), the package is a standard JEDEC outline for 16-bit SRAMs — the footprint matches legacy Cypress and ISSI parts in the same family. Supplied on Tape & Reel (TR), suited for automated pick-and-place.