The Infineon CY7C1366C-166AXCT is a 9 Mbit synchronous SRAM organized as 256K x 36 bits, clocked at 166 MHz with a 3.5 ns access time. That access time is the window from clock edge to data valid — at 166 MHz the cycle is 6 ns, so a 3.5 ns access leaves 2.5 ns of setup margin for the controller or FPGA. This part is designed for high-throughput cache, network buffer, or DSP scratchpad where the pipeline cannot stall for wait states.
Last Buy — plan your final order
That means Infineon has announced end-of-life and the final order window is closing. Once the last-time-buy date passes, the only supply channel will be surplus and broker inventory. If this SRAM is on your BOM, now is the time to commit to a lifetime buy or qualify a replacement.
166 MHz pipeline — matching the controller
The 166 MHz clock frequency defines the maximum bus speed. This part uses a synchronous SDR (single data rate) interface — one data transfer per clock cycle. For a 36-bit wide bus running at 166 MHz, the raw bandwidth is about 747 MB/s.
Commercial temperature — indoor use only
It belongs in office equipment, telecom racks, or lab instrumentation — not in a motor drive, engine bay, or outdoor enclosure. The 100-TQFP (14x20 mm) package is surface-mount and requires standard reflow handling; MSL level should be confirmed from the latest Infineon packing label before bake decisions.