Memory for pipelined data paths
The CY7C1356C-166AXCT is a 9 Mbit synchronous SRAM from Infineon's NoBL (No Bus Latency) family, organized as 512K x 18. It clocks at 166 MHz with a 3.5 ns access time, meaning the part can sustain back-to-back read/write transactions without dead cycles on the bus — a fit for high-throughput data buffers in networking or test equipment where every clock edge carries a valid word.
Infineon lists this part as Obsolete. The 100-TQFP footprint and 3.3 V supply rail are common across many synchronous SRAMs, but a board spin is likely required for a functional replacement.