NoBL pipeline — why the dead cycle disappears
The CY7C1354CV25-166BZCT uses a NoBL (No Bus Latency) architecture that eliminates the turnaround cycle between read and write operations. On a conventional sync SRAM, the bus direction switch costs one dead clock; NoBL lets the next command start on the following edge regardless of direction. At 166 MHz the 6 ns clock period means that dead cycle would cost 6 ns per bus-turn. NoBL recovers that slot, giving a sustained throughput close to the clock rate on mixed-read-write traffic — useful for frame buffers or look-up tables where the access pattern alternates.
256K x 36 — bus width and memory map
Organised as 256K depth by 36 bits wide, the 9 Mbit array maps onto a 36-bit data bus. The x36 width matches the datapath of a 32-bit processor with parity, or a 36-bit DSP word without packing overhead. Access time is 3.5 ns from clock edge to data valid. That 3.5 ns is the pin-to-pin delay through the memory array and output register — the design must budget this into the setup/hold window at the controller side, especially when the trace length exceeds 50 mm on a standard FR4 board.
Supply rails and temperature grade
Core supply is 2.375 V to 2.625 V — a tight 2.5 V ± 2.5 % window. The commercial temperature grade (0 °C to 70 °C) limits this variant to indoor, controlled-environment equipment.
Lifecycle and sourcing posture
Sourced through independent distribution channels. The Tape & Reel packaging is pick-and-place ready; if your line runs with tray-fed handlers, confirm the reel-to-tray transfer compatibility with your feeder specs.