The Micron MT55L256L18P1F-10 is a 4 Mbit ZBT (Zero Bus Turnaround) synchronous SRAM organized as 256K x 18 bits. It is designed for high-throughput applications where back-to-back read and write cycles must occur without dead cycles — think packet buffers in network switches, cache in telecom line cards, or look-up tables in FPGA-based accelerators. The 5 ns access time and 100 MHz clock rate let it keep pace with a 100 MHz bus without wait states, so timing closure on a high-speed memory interface is straightforward.
Package and mounting — 165-ball FBGA
The 165-ball TBGA (13x15 mm body) is a fine-pitch BGA that requires a multi-layer PCB with via-in-pad or microvia routing. It is surface-mount only — no socket option. The commercial temperature range (0°C to 70°C) limits this part to indoor, climate-controlled environments like central-office telecom, data-center networking gear, or benchtop test equipment. Not rated for industrial or automotive use.
Lifecycle and sourcing
The MT55L256L18P1F-10 is listed as Active in production — no end-of-life notice, no last-time-buy pressure. It is RoHS non-compliant (per the listing), so verify your assembly house's exemption policy if you need lead-free solder. This part is sourced and quoted to order through independent distribution; availability and current pricing are confirmed at quote time. For volume BOM commitments, an RFQ is the right next step.