Last Buy — time-limited procurement window
This part is in Last Buy status, meaning the manufacturer has issued an end-of-life notice and the final purchasing window is open. No official successor is listed in the available records. For a BOM line that requires this exact density, package, and speed grade, the procurement strategy is to secure lifetime buy quantities now through the independent distribution channel. We source and quote this part to order against an RFQ; availability and current pricing are confirmed at quote time.
3.4 ns access time — bus timing margin
The 3.4 ns access time at 167 MHz defines the window for valid data on the bus after the clock edge. In a 100-pin TQFP layout, trace-length matching and signal integrity on the parallel data bus become critical — this part demands a clean PCB stackup and controlled impedance to avoid setup/hold violations at speed. The 2M x 18 organization maps directly to an 18-bit data word, common in telecom line-card and switch-fabric buffer designs.
NoBL architecture — zero dead-cycle throughput
The NoBL series eliminates the idle cycle normally required when switching from read to write (or write to read) on a synchronous SRAM. For a controller that issues mixed read/write sequences — typical in a packet buffer or a real-time DSP scratchpad — this means sustained 167 MHz data rate without pipeline stalls. The trade-off is that the controller's memory interface must support the NoBL protocol; verify compatibility with your SoC or FPGA memory controller before substituting into an existing design.