The Infineon CY7C024-25JXCT is a 64Kbit dual-port asynchronous SRAM organized as 4K x 16 bits. Its two independent ports allow simultaneous read/write access from two bus masters without external arbitration logic — a common architecture in shared-memory designs like multiprocessor systems, telecom line cards, and video frame buffers. The 25 ns access time keeps bus turnaround tight enough for most 8- and 16-bit controllers running at moderate clock rates.
25 ns access time — bus-margin reality
For a 40 MHz bus (25 ns period), that leaves zero margin for address-to-data setup — you need a slower bus or a wait state. At 20 MHz (50 ns period) the margin is comfortable. If your processor runs faster than 20 MHz, check the address-to-data timing budget before committing the BOM line.
If your design can tolerate a footprint change, a modern dual-port SRAM in a QFP or BGA package may be a better long-term fit for new builds.
84-PLCC J-Lead — footprint and rework
The 84-PLCC (J-Lead) package is a legacy surface-mount form factor. The body measures 29.31 mm square. J-Leads are more forgiving than QFP for hand rework. The Tape & Reel (TR) packaging option is intended for automated pick-and-place assembly.
Not for industrial or outdoor enclosures.