Organized as 2M x 36, clocked at 300 MHz, and supplied from 1.7V to 1.9V, it is aimed at high-bandwidth buffering in network switches, baseband processing, and test equipment where every nanosecond of bus turnaround costs throughput.
At 300 MHz the QDR II bus delivers a data rate of 600 million transfers per second per port (double-data-rate on the clock edges). The 2M x 36 organization means a 36-bit-wide data word per access, so the peak bandwidth sits around 21.6 Gbit/s. That level of throughput is what a 10 GbE line card or a radar beamformer needs to keep its FIFO from underflowing. If your system runs a slower clock domain, the part also works at lower frequencies — but the 300 MHz rating is the headroom you pay for, and it is the figure that determines whether this SRAM can match the bus timing of a high-end FPGA or ASIC without inserting wait states.
Cypress (now Infineon) lists the CY7C1515KV18-300BZI as Active.
Package and supply — the board-level fit
The 165-ball FBGA (13x15 mm) is a surface-mount BGA with a 1.0 mm ball pitch — standard for high-density SRAMs in this density tier. The supply range of 1.7V to 1.9V means it runs from a nominal 1.8V rail, which is the common core voltage for QDR II memories. If your board already carries a 1.8V supply for the FPGA or ASIC bank, this part drops in without an extra regulator.