The Cypress CY7C1320KV18-333BZC is a 18Mbit synchronous SRAM using a DDR II (Double Data Rate II) architecture, organized as 512K x 36. It clocks at 333 MHz and uses a parallel memory interface, running from a 1.7V to 1.9V supply.
At 333 MHz the DDR II interface transfers data on both clock edges, effectively doubling the data rate per pin. For a 36-bit-wide word, that translates to over 12 Gbps of aggregate bandwidth — enough to keep a high-port-count switch fabric or a deep packet buffer fed without stalling the pipeline. The 512K x 36 organization means each access moves a full 36-bit word, which aligns well with 32-bit or 36-bit datapaths common in network processors and FPGA-based designs. If your application runs at a lower bus speed, the part still operates at the rated clock; the margin helps with signal-integrity closure on longer PCB traces.
Package and board-level considerations
The 165-ball FBGA (13x15 mm) is a fine-pitch BGA — expect 0.8 mm or 1.0 mm ball pitch depending on the specific footprint variant. The 1.7V to 1.9V core supply means you need a dedicated 1.8V rail, separate from any 3.3V or 2.5V I/O supplies on the board. For rework, the BGA requires a hot-air profile with bottom-side preheat;.