The Cypress CY7C1371KV33-133AXC is a 18 Mbit synchronous SRAM from the NoBL™ family, organized as 512K x 36 and clocked at 133 MHz with a 6.5 ns access time. The NoBL™ architecture eliminates the dead bus cycle between read and write turns, so back-to-back transactions run at full clock rate — useful in networking buffers, DSP memory pools, and FPGA co-processing where every cycle counts.
6.5 ns access time — timing margin for the system designer
At a 133 MHz clock (7.5 ns period), that leaves about 1 ns of margin before the next clock edge — tight but workable with controlled PCB impedance and matched trace lengths. If your FPGA or ASIC has a setup time of 1.5 ns, you are inside the window; if the controller is slower, you may need to add a wait state or drop to a lower clock rate. The 133 MHz clock frequency is the maximum rated speed; the part will run slower if the system clock is divided down, but the access time stays at 6.5 ns regardless of the actual clock rate.
It is not rated for industrial motor drives, outdoor base stations, or automotive under-hood environments.