The Infineon CY7C1353F-100AC is a 4.5Mbit synchronous SRAM organized as 256K x 18 bits. It is a single-data-rate (SDR) pipeline-burst device designed for cache and buffering in networking, telecom, and embedded systems that need deterministic read/write latency. The 100 MHz clock and 8 ns access time keep the bus cycle tight for a mid-speed synchronous memory.
8 ns access time at 100 MHz — timing budget for the bus
With a 100 MHz clock, the 8 ns access time leaves margin for the controller. The synchronous pipeline means the part latches the address on the rising edge and presents data on the next cycle.
The CY7C1353F-100AC is marked obsolete by Infineon. There is no listed successor in the record, so anyone holding a BOM with this line item is looking at the surplus and broker channel.