7.5 ns access time — bus timing margin
At 133 MHz the bus cycle is 7.5 ns. The MT57W512H36BF-7.5's access time matches that period, meaning zero wait-state reads when the controller's output-hold and setup windows align. For a design running a 133 MHz memory bus, this part closes timing without extra pipeline stages. If the controller has tighter hold requirements, the 7.5 ns window is the constraint to verify against the memory controller's AC timing — not a generic 'fast SRAM' assumption.
Commercial temperature — indoor use only
Rated 0°C to 70°C ambient. This part belongs in a server room, telecom central office, or benchtop instrument — not in a motor drive enclosure, outdoor base station, or under-hood electronics. For an industrial or automotive BOM, the temperature grade alone disqualifies it unless the assembly is actively climate-controlled.