What this NoBL™ synchronous SRAM brings to the bus
The Infineon CY7C1354C-166AXIT is a 9Mbit synchronous SRAM organized 256K x 36, built on the NoBL™ (No Bus Latency) architecture. It clocks at 166 MHz with a 3.5 ns access time, meaning the memory controller can issue back-to-back reads and writes without dead cycles on the bus. That matters when you are sizing the memory subsystem for a network switch, a base station line card, or an industrial controller that cannot stall on a cache miss. The 36-bit word width maps cleanly to a 32-bit data bus plus a parity or ECC nibble, so you skip an external latch for the check bits.
166 MHz clock, 3.5 ns access — what that means for timing closure
At 166 MHz the clock period is about 6 ns. With a 3.5 ns access time from clock edge to data valid, you have roughly 2.5 ns of setup margin before the next clock edge — enough to absorb PCB trace skew and package delay in a well-laid-out 100-TQFP board. The synchronous SDR interface uses a single clock edge for both address and data, so the controller does not need a DLL or PLL to align phases. Supply runs from 3.135V to 3.6V, which is the standard 3.3V rail with margin for ripple.
Infineon lists this part as Active. No last-time-buy notice, no end-of-life warning on the horizon. If you need a few units for a repair or a prototype run, the same reel can be cut-taped.