This part was designed for high-bandwidth, low-latency data buffering in networking switches, base stations, and telecom line cards where the double-data-rate bus halved the pin count compared to a single-data-rate wide bus.
At 250 MHz the DDR II interface transfers data on both clock edges.
Any remaining stock is new-old-stock or surplus inventory held by independent distributors. For a production BOM that still calls out this exact speed grade, the procurement path is the spot market — qualified against an RFQ, with date code and traceability confirmed at quote time. No factory lead time exists.