36Mbit DDR II SRAM — 250 MHz pipeline
The Cypress CY7C1418AV18-250BZC is a 36Mbit synchronous SRAM with a DDR II interface, organized as 2M words by 18 bits. It clocks at 250 MHz on a parallel bus, delivering back-to-back read/write throughput without dead cycles — the DDR II means data transfers on both clock edges, effectively doubling the data rate per pin. The 1.7V to 1.9V supply rail places it in the low-voltage SRAM generation, sized for networking packet buffers, switch fabric queues, and high-speed cache where the combination of density and bandwidth matters more than raw density alone.
Commercial temperature grade — indoor equipment only
It is not specified for outdoor base stations, automotive cabin, or factory-floor enclosures where the ambient swings below freezing or above 70°C. The 165-FBGA (15x17 mm) package demands a multi-layer PCB with via-in-pad or microvia fanout under the ball array.
Obsolete — no factory orders, spot-market only
Cypress has marked this part obsolete. No new factory orders, no last-time-buy window remains open. The only channel is independent distribution — surplus inventory, pulled trays, and broker-held stock. Date codes will vary, and counterfeiting risk goes up on a high-value, end-of-life SRAM like this. Every unit we quote is visually inspected and electrically sampled before shipment; we do not drop-ship unverified stock.
No official successor on record
The Cypress SRAM portfolio has moved to newer process nodes and package options, but the ledger carries no direct pin-compatible successor for this exact 165-FBGA footprint. If the board layout is fixed, the only path is the spot market. For a new design, a current-generation DDR II+ or QDR SRAM in a compatible BGA pitch would be the starting point — but that means a board spin.