4K x 9 asynchronous FIFO — 15 ns access, 50 MHz data rate
The CY7C433-15JXC is a 4K x 9 asynchronous FIFO from the CY7C series. The 4K x 9 organization is the key differentiator here: most FIFOs in this density class are x8 or x9, but the x9 width specifically suits applications that need an extra bit per word for out-of-band signaling or parity without doubling the chip count. This is a first-in, first-out buffer with no FWFT (First-Word Fall-Through) support, so the first word appears on the outputs only after the first read strobe following a write — a standard asynchronous handshake. Retransmit capability is included, allowing the FIFO to replay data from the beginning without a full reset, useful for packet retry in communications links.
The CY7C433-15JXC is obsolete per Cypress lifecycle records. The 32-PLCC J-lead package is a legacy footprint. Given the obsolete status, buyers should expect lead times and pricing to reflect scarcity; we recommend quoting against the exact quantity and target delivery window.
32-PLCC J-lead — legacy footprint, rework considerations
The CY7C433-15JXC comes in a 32-lead PLCC with J-bend leads (package case 32-LCC J-Lead, supplier package 32-PLCC 11.43x13.97mm). This is a surface-mount package but with a footprint that differs from modern QFP or BGA — the J-leads sit under the body, requiring a PLCC socket or a specific land pattern with via-in-pad for hand-solder or rework. For reflow, the J-lead profile is forgiving, but the PLCC body can trap flux; a no-clean flux and post-reflow inspection of the hidden solder joints is standard practice.