18 Mbit synchronous SRAM for high-throughput data paths
It uses a parallel interface and operates from a 3.135V to 3.6V supply. This part is designed for high-bandwidth applications such as network switches, telecom line cards, and base stations where the wide 36-bit word width matches the data bus of a processor or ASIC without needing external muxing.
167 MHz clock and 3.4 ns access — timing closure for the bus
The 167 MHz clock rate and 3.4 ns access time define the read-cycle timing for the memory bus. At this speed, the SRAM can sustain back-to-back reads without wait states if the controller meets the setup and hold windows. The 3.4 ns access is the time from clock edge to data valid — budget this against the FPGA or ASIC input delay plus PCB trace flight time. A 167 MHz bus with a 6 ns period leaves about 2.6 ns for the controller to capture data after the SRAM outputs it, which is tight but workable with matched-length traces and controlled impedance.
It belongs in office-environment equipment, lab instruments, or indoor telecom racks — not in an outdoor base station cabinet or an engine bay. If the design sees -40°C or +85°C, this part will not hold timing or data integrity at the extremes.
Infineon lists the CY7C1386D-167AXC as obsolete. This part is no longer in factory production, so new inventory comes through independent distribution and surplus channels.