The Renesas 7203L12JG is an asynchronous FIFO memory from the 7200 series, organized as 2K x 9 bits (18 Kbit total).
Asynchronous operation and retransmit capability
This is a true asynchronous FIFO: separate read and write clocks (or strobes) with independent enable pins. No FWFT (First-Word Fall-Through) support means the first written word does not appear on the outputs until the first read strobe — a standard synchronous-style read cycle. The retransmit capability allows resetting the read pointer to the beginning of the FIFO without clearing the data, useful for retry-on-error protocols. Expansion is supported in both depth and width, so multiple 7203L12JG devices can be cascaded for larger buffers.
For a BOM that requires a 2K x 9 asynchronous FIFO in a 32-PLCC, this is a direct fit with no substitution risk.