72 Mbit QDR II SRAM at 250 MHz — what it does
It clocks at 250 MHz with a 4M x 18 organization, giving the bus two independent read and write ports that eliminate dead cycles on back-to-back transactions. This part is designed for high-throughput buffer applications — typically network switch fabric packet memory, line-card buffers, and cache in telecom infrastructure where every nanosecond of bus turnaround matters.
250 MHz — what that clock buys you
At 250 MHz the QDR II interface delivers a peak data rate of 1 GB/s per port (double-data-rate on both read and write ports). That sustained throughput is what drives the choice for 40G/100G line-rate packet processing. The 1.7V to 1.9V core supply keeps I/O swing tight, reducing simultaneous-switching noise on a wide bus.
Last Buy — plan the LTB window now
Infineon lists the CY7C1513KV18-250BZC in Last Buy status. That means the final order window is open — once it closes, the part moves to end-of-life and only surplus or broker inventory remains. If this SRAM is in a production design, lock the last-time-buy quantities and qualify a second-source or migration path before the window shuts.
Package and temperature — board-fit constraints
Supplied in a 165-ball LBGA (13x15 mm body, 1.0 mm pitch). That's a fine-pitch BGA — needs controlled impedance on the QDR bus, matched trace lengths, and a full via array under the package for thermal relief. Not rated for outdoor base stations or engine-bay electronics; this is indoor rack-mount equipment territory.