The Cypress CY7C1329H-166AXCT is a 2 Mbit synchronous SDR (Single Data Rate) SRAM organized as 64K words by 32 bits. The 32-bit wide data bus matches well with 32-bit processor and DSP memory interfaces, reducing the chip count versus narrower memories.
166 MHz clock and 3.5 ns access time — timing budget for the bus
At 166 MHz the clock period is about 6 ns. With a 3.5 ns access time, the memory leaves roughly 2.5 ns of setup-and-hold margin for the controller — tight but workable with proper PCB trace-length matching and controlled impedance on the data and address lines. This part is sized for designs that cannot tolerate the dead cycles of a late-write or flow-through asynchronous SRAM; every clock edge delivers a word.
Package and footprint — 100-TQFP (14x20)
The exposed pad (if present on this variant) should be stitched to ground plane with thermal vias for heat spreading.
Any BOM using this part should plan for a last-time-buy or a qualification of a newer synchronous SRAM family.