36Mbit synchronous SRAM for high-throughput buffer and cache
The Infineon (Cypress) CY7C1444AV33-250AXI is a 36Mbit synchronous single-data-rate (SDR) SRAM organized as 1M x 36, clocked at 250 MHz with a 2.6 ns access time.
250 MHz clock and 2.6 ns access time — timing margin for pipelined buses
At 250 MHz the SRAM delivers a 4 ns cycle period. The 2.6 ns access time from clock edge means the data output settles well within the half-cycle window, giving the controller or FPGA setup margin on the read data bus. For a 36-bit parallel bus this margin is the difference between a clean timing closure and a respin — especially when routing through a BGA breakout or across a backplane.
Infineon (Cypress) lists the CY7C1444AV33-250AXI as Obsolete, meaning it is no longer in production and has passed any last-time-buy window. Each unit is sourced against an RFQ, with date codes and condition verified before shipment.
Second-source and replacement reality
There is no official second-source or pin-compatible drop-in replacement for the CY7C1444AV33-250AXI from another manufacturer. The base product number CY7C1444 covers several speed and temperature variants (e.g., -200 vs -250, commercial vs industrial), but all share the same 100-TQFP footprint and 1M x 36 organization. For a new design, a newer-generation synchronous SRAM family (such as Cypress's own 72Mbit or NoBL parts) would require a PCB and timing rework.