9 Mbit synchronous SRAM, 133 MHz — the NoBL™ pipeline
The CY7C1357C-133AXIT: It belongs to the NoBL™ (No Bus Latency) series, which eliminates dead cycles between read and write turns on the same port — the pipeline keeps the data bus moving at full clock rate without idle wait states.
Infineon lists this part as Obsolete. That means the manufacturer has stopped production and no further last-time-buy window is open. The only supply channel is independent distribution — surplus, new-old-stock, or broker inventory. A pin-compatible drop-in from the same NoBL™ family may exist, but without a documented cross-reference, each BOM position must be qualified against the original footprint and timing.
The 0.5 mm pitch demands careful PCB layout — the supply decoupling should sit within 5 mm of each VDD/VSS pair to keep the core noise below the 3.6 V ceiling.