200 MHz synchronous SRAM with 2.8 ns access — the bus-margin decision
The Cypress CY7C1350G-200AXCT is a 4.5 Mbit synchronous SRAM from the NoBL™ family, organized as 128K x 36 bits. It runs on a 200 MHz clock and delivers a 2.8 ns access time from clock edge to data valid — that 2.8 ns is the window the controller has to capture the read word before the next clock edge. At 200 MHz with a 5 ns period, a 2.8 ns access leaves 2.2 ns of hold and routing margin; enough for most 3.3 V FPGA or ASIC interfaces without inserting wait states, but the board trace delay and clock skew budget need checking. The 36-bit word width (32 data plus 4 parity/ECC) targets systems that need single-bit error correction on the fly — network packet buffers, cache tag stores, or telecom line cards where a single-bit upset stalls a link.
Cypress (now Infineon) has issued a last-time-buy window; after that date the part will no longer be manufactured. If your BOM still specifies the CY7C1350G-200AXCT, the decision window is now — you either place a lifetime buy to cover the remaining production run, or you begin qualifying a pin-compatible alternative. Independent distribution can source remaining inventory, but availability tightens as the LTB deadline approaches.
Package and supply — what the layout engineer needs
The CY7C1350G-200AXCT is supplied in a 100-TQFP package (14x20 mm body, 0.5 mm pitch). Decoupling: place a 0.1 µF ceramic close to each supply pin pair, with a 10 µF bulk cap per side of the package. The 200 MHz clock input is LVTTL-compatible; keep the clock trace impedance-controlled (50 Ω) and length-matched to the data bus if the controller is on the same board.