72Mbit QDR II+ SRAM at 600 MHz — what the clock rate buys you
The CY7C2563XV18-600BZC is a 72Mbit synchronous SRAM from Infineon (formerly Cypress) using the QDR II+ architecture. It is organized as 4M x 18 and runs at a 600 MHz clock frequency, which gives the memory interface a peak data rate of 1.2 Gbps per I/O pin using double-data-rate transfers on both read and write ports. This part targets high-bandwidth, low-latency lookup and buffering in networking gear — switches, routers, and packet processors — as well as test equipment and compute-acceleration cards where the memory bus is the bottleneck. The 1.7V to 1.9V core supply keeps I/O levels in the 1.8V HSTL class, which is standard for this performance tier.
600 MHz — the so-what for timing closure
At 600 MHz the clock period is roughly 1.67 ns. The QDR II+ architecture uses separate read and write data buses, each clocked at the same frequency, so the controller must close timing on both ports simultaneously. This drives the need for tight PCB layout — controlled impedance, matched trace lengths, and minimal stub loading on the address/control lines. The 165-FBGA (13x15) package helps by keeping bond-wire inductance low, but the board designer still needs to budget for the on-chip termination and reference voltage (VREF) plane.
Package and supply — footprint and rail decisions
Surface-mount only. The supply range is 1.7V to 1.9V, so a 1.8V ±5% rail is the typical choice. The QDR II+ interface requires a separate VREF — usually 0.9V — generated from the 1.8V rail via a resistor divider or a dedicated reference buffer. The Tray shipping medium is standard for this BGA package; if your pick-and-place line prefers tape, the part is also available in Tape & Reel under a different order code (check the CY7C2563 family suffix).
There is no last-time-buy window open and no end-of-life notice issued. This is a current-production part, which means it remains eligible for authorized-distributor orders and is not limited to the surplus channel.