18 Mbit QDR II SRAM at 300 MHz — what the clock rate buys you
The CY7C1312KV18-300BZC is a 18 Mbit synchronous SRAM from Infineon (formerly Cypress) using the QDR II architecture. It is organized as 1M x 18 and clocks at 300 MHz, delivering a peak read-write bandwidth that suits high-throughput buffer applications — network packet processing, test equipment frame buffers, or cache memory in FPGA-based designs where the bus must sustain back-to-back transactions without dead cycles. The QDR II interface separates read and write data ports, so the controller can issue a read and a write on every rising clock edge, effectively doubling throughput versus a common I/O SRAM at the same frequency.
Last Buy — plan the LTB order now
That means Infineon has issued a final purchase window — once the last-time-buy date passes, the part will no longer be manufactured. The 165-FBGA footprint is shared with other QDR II densities in the family, so a drop-in replacement may exist at a different memory size, but that requires board-level validation.
165-FBGA — footprint and rework notes
The package is a 165-ball FBGA, 13 x 15 mm body, surface-mount only. For rework, a bottom-side preheat profile that keeps the junction below 220°C is standard; the 0.8 mm ball pitch allows visual alignment with X-ray inspection afterward.