72K synchronous FIFO — what the 66.7 MHz data rate means for your buffer
The CY7C4251V-15AXC: Synchronous FIFO organized as 8K words by 9 bits (72K total), clocked at 66.7 MHz with 11 ns access time.
Supply and temperature — single-rail 3.3 V, commercial range
Maximum supply current is 20 mA, so thermal management in the 32-TQFP package is straightforward; no heatsink or forced airflow needed.
Expansion and flags — depth and width cascading, no programmable flags
Supports depth and width expansion, meaning you can cascade multiple devices to build larger buffers or wider data paths without external glue logic. Note that this variant does not include FWFT (First-Word Fall-Through), retransmit capability, or programmable flags — the flag logic is fixed. For designs that need FWFT or custom flag thresholds, you would look at a different Cypress FIFO family member.