What this part is — Cypress NoBL 72Mbit synchronous SRAM
It runs on a 167 MHz clock with a 3.4 ns access time and operates from a 2.375V to 2.625V supply. It is a volatile memory with a parallel interface, intended for high-bandwidth buffering in networking, telecom, and video processing equipment where back-to-back read/write cycles must avoid dead cycles.
The 167 MHz clock drives the 36-bit parallel bus.
72Mbit density — buffer sizing for line-rate applications
72Mbit (2M x 36) provides depth for a packet buffer or a video frame. The x36 width matches common FPGA memory controller widths.