The 36-bit word width suits processors or ASICs with 36-bit data buses or parity/ECC applications.
This part is listed as Obsolete. If you have a board that uses the CY7C1386C-167AC, you are looking at surplus or broker-channel inventory to fill a BOM line. For a production run, qualifying a second source or migrating to a newer synchronous SRAM family (like Cypress's own 18 Mbit NoBL or QDR parts) is the long-term fix.
The 3.4 ns access time is measured from the clock edge to data valid, which at 167 MHz (6 ns cycle) leaves about 2.6 ns for board trace delay, input capacitance, and setup time at the receiver. That is a tight window—signal-integrity simulation on the address/control bus and matched-length routing on the data lines are not optional. The 36-bit parallel interface means 36 data lines plus address and control all need to meet setup-and-hold relative to the same clock edge. If you are replacing a failed part on an existing board, the original layout already accounts for this; if you are designing it in, budget for controlled-impedance traces and a clean clock tree.
Package and temperature grade—commercial environment only
The CY7C1386C-167AC comes in a 100-LQFP package (supplier device package 100-TQFP, 14x20 mm body). That is a fine-pitch (0.5 mm or 0.65 mm typical for 100-pin TQFPs) surface-mount package, reworkable with hot air but requiring careful alignment and stencil design for the PCB assembly. No industrial or automotive temperature rating here; if your application sees -40°C or +85°C ambient, this part will not meet the spec.