250 MHz QDR II SRAM — the bus-width and density decision
It clocks at 250 MHz on a parallel interface, delivering two data words per clock edge on separate read and write ports — effectively quadrupling the throughput of a conventional single-port SRAM at the same frequency. The 36-bit wide data bus suits designs that need a full 32-bit word plus parity or ECC overhead in a single cycle, common in network packet buffers, telecom line cards, and high-end test equipment.
The CY7C1314BV18-250BZXC is officially obsolete per Cypress (now Infineon). For existing BOM lines or repair spares, supply is limited to independent-distributor and broker inventory. Date codes will vary, and parts must be screened for authenticity and condition before reflow. No direct pin-compatible replacement is listed on the official record. The QDR II family includes other density/speed grades (e.g., the CY7C1314BV18-200BZXC at 200 MHz), but those are also obsolete. A redesign to a current-generation SRAM (QDR IV or DDR) is the long-term fix.
165-ball FBGA, 13x15 mm body, 1.0 mm ball pitch. Standard lead-free reflow profile applies (peak 260°C). The fine pitch means solder-bridge risk is real — X-ray or AXI inspection after reflow is recommended.