8Kbit dual-port SRAM for shared-memory arbitration
The Infineon (Cypress) CY7C131-15JXCT is an 8Kbit dual-port asynchronous SRAM organized as 1K x 8 bits. It provides two independent ports with separate address, data, and control lines, allowing two bus masters (e.g., a DSP and an MCU, or two processors) to access the same memory array without arbitration logic. The 15 ns access time keeps bus turnaround tight for 5 V legacy systems. Typical applications include shared-memory buffers in telecom line cards, industrial controllers, and multiprocessor systems where a small, fast scratchpad is needed.
15 ns access time — timing margin in a 5 V bus
In a 5 V system with a 20–25 MHz bus, that leaves roughly 10–15 ns of margin after accounting for PCB trace delay and output loading — comfortable for a single load, but worth verifying if the bus fans out to multiple memories or peripherals.
52-PLCC footprint and commercial temperature range
Housed in a 52-lead PLCC with J-leads, the package measures 19.13 x 19.13 mm and is surface-mount soldered. The J-lead form factor is socket-friendly for prototyping but requires a PLCC footprint on the PCB — not pin-compatible with SOJ or TSOP.
Cypress (now Infineon) no longer manufactures this exact order code. No direct Infineon replacement has been identified for this specific dual-port 8Kbit 52-PLCC variant; verify pin-compatible alternatives in the CY7C131 family if a second source is needed.