100 MHz synchronous FIFO — what the 8 ns access buys you
The Cypress CY7C4831-10AC is a synchronous FIFO memory from the CY7C series, organized as 36K (2K x 9 x 2) with a 100 MHz data rate and 8 ns access time. The part supports depth and width expansion, programmable flags, and bidirectional bus direction, but does not include retransmit capability or FWFT support. It comes in a 64-LQFP package for surface-mount assembly.
Obsolete — plan your last-time-buy or find a replacement
The CY7C4831-10AC is listed as obsolete per the lifecycle record. This means Cypress (now Infineon) has discontinued production, and no further factory orders are accepted. If you are maintaining a legacy board, secure your remaining lifetime requirement now — once the surplus channel dries up, this part becomes hard to find.
If your application sees temperature swings outside this band, you need a different part.
Package and footprint — 64-LQFP / 64-TQFP (14x14 mm)
The CY7C4831-10AC is supplied in a 64-LQFP package (supplier device package 64-TQFP, 14x14 mm body). This is a standard fine-pitch surface-mount footprint. If you are evaluating a replacement, the package compatibility is the first check — many synchronous FIFOs from Cypress and others use similar 64-pin TQFP outlines, but pin assignments vary. Verify the footprint against your PCB layout.