133 MHz synchronous SRAM — 4 ns access, 32-bit wide
The Cypress CY7C1339G-133AXCT is a 4Mbit synchronous SDR SRAM organized as 128K x 32 bits. It clocks at 133 MHz with a 4 ns access time, making it a fit for high-throughput cache, frame buffers, or network packet memory where the processor or ASIC needs a 32-bit wide data bus without byte-lane muxing. The parallel interface and 3.15V to 3.6V supply rail place it in the 3.3V logic family common on late-2000s designs.
For a BOM line that still calls out CY7C1339G-133AXCT, the only channel is independent distribution — new-old-stock or surplus inventory. That means the buyer needs to qualify the part for fit and verify traceability before committing the board. No LTB window remains; the supply is whatever stock exists on the spot market.
100-TQFP — field-swap reality
The package is a 100-TQFP with a 14x20 mm body. That is a fine-pitch QFP — not socket-friendly, not a field-swap part without a hot-air station and a steady hand. The leads are gull-wing, so visual inspection after rework is possible, but the 0.5 mm pitch means bridging risk if the solder paste volume is off. No lab bench needed for the replacement itself, but a reflow oven or hot-air pencil is mandatory.