72 Mbit DDR II+ SRAM at 550 MHz
The CY7C25682KV18-550BZXC is a 72 Mbit synchronous SRAM from Infineon, organized as 4M x 18 bits and built on DDR II+ technology. The 550 MHz clock rate means the memory delivers double-data-rate transfers on both edges of the clock, effectively doubling the data throughput per pin compared to a single-data-rate part at the same frequency.
Operates from a single 1.7 V to 1.9 V supply rail — a narrow window that keeps the I/O levels compatible with low-voltage ASICs and FPGAs without needing a separate VDDQ rail.
The parallel memory interface routes 18 data lines plus address and control; the 550 MHz edge rate demands careful signal-integrity layout with matched trace lengths and proper termination on the data strobes.