133 MHz synchronous SRAM for pipeline-bound designs
The CY7C1357C-133AXCT is a 9Mbit synchronous SRAM organized 512K x 18, clocked at 133 MHz with a 6.5 ns access time. It belongs to Infineon's NoBL™ (No Bus Latency) family, which eliminates the dead bus cycle between reads and writes — the data bus stays active every clock edge, so a write can follow a read without an idle cycle.
Where the 133 MHz clock and 512K x 18 organization matter
The 133 MHz clock rate and 18-bit data width target networking equipment — switch buffers, router forwarding tables, and line-card packet memory — where the bus must sustain back-to-back transactions without wait states. The 512K depth per chip provides 9 Mbit of look-up table or temporary storage in a single package. The 100-TQFP (14x20 mm) footprint is a standard fine-pitch quad flat pack; the 0.5 mm pitch requires controlled impedance routing on the data lines if the board runs the full 133 MHz clock edge rate.