It clocks at 400 MHz with a parallel interface, designed for high-bandwidth, low-latency data buffering in networking switches, routers, and telecom line cards where back-to-back read/write throughput matters. The 1.7V to 1.9V supply and 165-ball FBGA (13x15 mm) footprint place it in dense, high-speed memory subsystems.
Obsolete — planning the replacement or last-time-buy
For a production line that depends on this exact density, organization, and package, the path is either a last-time-buy from remaining distributor stock or a validated pin-compatible replacement from the same QDR II+ family — typically a higher-density or speed-binned variant that shares the 165-ball FBGA footprint and 1.7V–1.9V supply rail.
Package and supply — what to match in a replacement
The 165-ball FBGA (13x15 mm) is a specific land pattern — any replacement must share the same ball pitch and matrix to avoid a board spin. Supply voltage is 1.7V to 1.9V, which is the core rail for QDR II+ devices; a replacement must operate within that window. The parallel memory interface is fixed at 1M x 36, so the replacement must offer the same depth and width unless the system controller can be reprogrammed for a different organization.