333 MHz QDR II SRAM — what it is and where it fits
The Infineon CY7C1315KV18-333BZC is a 18 Mbit synchronous SRAM built on QDR II architecture, organized as 512K x 36. It clocks at 333 MHz over a parallel interface, delivering back-to-back read and write on separate ports — no bus-turnaround dead cycles. That makes it a fit for high-throughput buffers in network switches, baseband processors, and test equipment where the data path needs full-rate reads and writes simultaneously.
333 MHz — what it means for bus timing
At 333 MHz the QDR II interface runs a double-data-rate clock on both read and write ports. The 1.7 V to 1.9 V core supply keeps I/O swing tight, which helps signal integrity on a dense 165-ball FBGA layout.
Last Buy — sourcing reality
Package and assembly constraints
The 165-ball LBGA (13x15 mm body) is a fine-pitch BGA. That rules out hand-soldering or field swap without a reflow oven and X-ray inspection. The commercial temperature range (0°C to 70°C) limits it to indoor, climate-controlled environments — no engine bay, no outdoor cabinet without active cooling.