What this FIFO is and where it fits
The Renesas 72V05L15JG is an asynchronous FIFO memory organized as 8K x 9 bits, giving 72 Kbits of storage. It operates from a 3 V to 3.6 V supply.
Package and mounting
The 72V05L15JG supports retransmit capability, which lets you reset the internal read pointer back to the beginning of the FIFO without clearing the data. This is useful in packet-buffer applications where a transmission fails and you need to replay the same data block without reloading it from the source. The part also supports depth and width expansion, so multiple 72V05L15JG devices can be cascaded to build deeper or wider FIFO arrays — a common pattern in high-channel-count data loggers or multi-port switch buffers. Note that it does not support FWFT (First-Word Fall-Through) or programmable flags, so the flag outputs are fixed: empty, full, half-full, and the retransmit control. The asynchronous interface means no external clock is needed for the FIFO core — the read and write operations are self-timed by the control signals, which simplifies timing closure on a mixed-speed bus.
Lifecycle and sourcing reality
It is ROHS3 compliant. The active status means you can qualify it into new designs without worrying about a last-time-buy window.