What this FIFO does on the board
The Cypress CY7C4245-10AXCT is a synchronous FIFO (first-in, first-out) memory buffer from the CY7C series, organized as 4K words by 18 bits for a total capacity of 72 Kbits. It clocks data in and out at up to 100 MHz with an 8 ns access time, making it suitable for high-speed data buffering between asynchronous clock domains or across a backplane. It supports depth and width expansion, retransmit capability, and programmable flags — features that simplify flow control in a multi-FIFO design.
100 MHz clock — what it buys you
A 100 MHz synchronous interface means the FIFO can accept or deliver one 18-bit word every 10 ns, assuming no flag stalls. That throughput suits it for buffering data from a fast ADC, a parallel bus, or a DSP link where the source and sink run on different clock domains. The 8 ns access time from the read clock edge to data-valid leaves roughly 2 ns of setup margin at 100 MHz — tight but workable with controlled-impedance traces and short stub lengths on the board.
Cypress has discontinued production, and no last-time-buy window is indicated in the available records.
Supply and temperature — fit check
For a cold-start or outdoor deployment, a wider-temperature variant would be needed.