The CY7C1350G-166AXI: That means the factory stopped production and there is no official last-time-buy window still open. For a board that already carries this part, the only supply path is independent distribution — surplus, new-old-stock, or broker inventory. No pin-compatible successor is listed by Infineon, so a replacement requires either a board spin or a functionally equivalent SRAM in the same footprint.
166 MHz synchronous SRAM — 3.5 ns access
This is a 4.5 Mbit synchronous SRAM organised as 128K x 36 bits. The 166 MHz clock frequency and 3.5 ns access time mean it can keep up with a fast bus without wait states — useful in a networking or telecom line card where the memory must deliver a 36-bit word every clock cycle. The NoBL™ (No Bus Latency) architecture eliminates the dead cycle between read and write turns, so back-to-back transactions hit full throughput.
Industrial temp grade — 100-LQFP footprint
The 100-LQFP package with a 14x20 mm body is a standard fine-pitch QFP — 0.5 mm pitch, no exposed pad. A rework station with a hot-air nozzle can replace it, but the fine pitch demands careful alignment and a pre-bake if the board has been in storage.