72 Mbit DDR II SRAM at 300 MHz — what it buys the pipeline
The Cypress CY7C1520KV18-300BZI is a 72 Mbit synchronous DDR II SRAM organized as 2M x 36, clocked at 300 MHz. DDR II means data is transferred on both rising and falling clock edges, effectively doubling the data rate through the 36-bit parallel bus. For a system architect, that translates to a peak bandwidth of 2.4 GB/s (300 MHz × 2 edges × 36 bits ÷ 8), which is the figure that matters when sizing the memory pipeline for a network processor, base station line card, or high-end test equipment.
Industrial temperature grade — where it runs
The 165-FBGA (13x15 mm) package with 165 balls is a standard footprint for high-density memory, but the fine-pitch BGA demands careful PCB layout — keep the decoupling caps within 2 mm of the ball pads and route the 36-bit data bus with matched trace lengths to maintain timing at 300 MHz.
For a procurement buyer, this means the part is available only through independent distribution — new-old-stock or surplus inventory. Any BOM line that still specifies this SRAM needs a qualification plan: either buy a lifetime buy quantity through the broker channel, or identify a pin-compatible replacement from the same DDR II SRAM family (e.g., a 72 Mbit, 300 MHz, 165-ball FBGA part from another vendor) and re-qualify the board.