25 ns dual-port SRAM for shared-memory arbitration
The Cypress CY7C025-25JXCT is a 128Kbit dual-port asynchronous SRAM organized as 8K x 16, designed to give two independent bus masters simultaneous read/write access to a common memory array without arbitration logic. The 25 ns access time means the memory can complete a read or write cycle within 25 ns from address assertion, which is fast enough to keep up with many legacy 5V DSPs, microcontrollers, and ASICs running at 40 MHz or slower without inserting wait states. The dual-port architecture eliminates the need for external bus-sharing logic in applications like video frame buffers, multiprocessor mailboxes, and network packet queues.
5V supply and commercial temperature range
If your system runs on 3.3V or lower, this SRAM will need a separate 5V rail and level translation on the address/data buses.
84-PLCC J-lead package — footprint and handling
The 84-PLCC (J-lead) package measures 29.31 mm square and uses J-shaped leads on all four sides. It is a surface-mount package that requires a reflow profile compatible with PLCC solder joints; the J-lead form factor is less common in modern designs, so verify that your pick-and-place and reflow equipment can handle it. The Tape & Reel (TR) packaging option is intended for automated assembly, but the part's obsolete status means remaining stock may be in cut tape or tray form depending on the surplus lot.
Buyers should expect limited and diminishing supply, and plan for last-time-buy or alternate sourcing if the BOM depends on this exact footprint.