166 MHz synchronous SRAM for high-speed cache and buffer applications
The Cypress CY7C1329H-166AXC is a 2Mbit synchronous SRAM organized as 64K words by 32 bits, with a 166 MHz clock and 3.5 ns access time. This part is designed for high-throughput data buffering, cache memory, and FIFO replacement in networking, telecom, and test equipment where the bus must run at full clock rate without wait states. The 100-LQFP (14x20 mm) surface-mount package fits standard fine-pitch footprints.
3.5 ns access time — timing closure at 166 MHz
The 3.5 ns access time is the window from address assertion to valid data on the bus. At 166 MHz the clock period is about 6 ns, so a 3.5 ns access leaves roughly 2.5 ns for board trace delay, clock skew, and setup time at the controller. That is tight — expect to place the SRAM close to the memory controller and use matched-length traces. The synchronous pipeline (SDR) means data appears on the rising edge after the address is latched, which simplifies the interface compared to asynchronous SRAM but still demands careful signal-integrity design.
Cypress (now part of Infineon) no longer manufactures this specific speed grade and package variant.
This part is intended for controlled indoor environments — office equipment, lab instruments, telecom central-office racks, and similar. If the application requires -40°C to 85°C or 105°C, look for an industrial-temperature variant in the same Cypress synchronous SRAM family (check the base product number CY7C1329 suffix).