The Cypress CY7C1265XV18-600BZXC is a 36Mbit QDR II (Quad Data Rate II) synchronous SRAM organized as 1M x 36 bits, clocked at 600 MHz.
600 MHz clock — what it buys the system
The 600 MHz clock rate on this QDR II SRAM translates to a peak data rate of 1.2 Gbps per I/O pin (double-data-rate on both read and write ports). For a 36-bit-wide bus, that is over 43 Gbps aggregate bandwidth — enough to keep a high-end FPGA or ASIC's internal logic fed without stalling. The trade-off is tighter timing closure: the 1.7V to 1.9V core supply and the 165-FBGA package demand careful PCB layout with controlled impedance traces and adequate decoupling within 5 mm of each supply pin.
Obsolete — sourcing path for sustainment programs
Cypress (now part of Infineon) has discontinued this specific speed-grade and package variant. For existing BOM lines in telecom infrastructure or defense systems that require this exact 600 MHz, 1M x 36 QDR II SRAM, procurement must turn to the independent distribution channel — verified surplus stock, last-time-buy inventory, or broker-sourced material.